WO2023162947A1

WO2023162947A1 - Compound, organic electroluminescent element material, organic electroluminescent element, and electronic device

Info

Publication number: WO2023162947A1
Application number: PCT/JP2023/006112
Authority: WO
Inventors: 佑典高橋; 将太田中; 裕亮糸井; 拓人深見; 司澤藤
Original assignee: 出光興産株式会社
Priority date: 2022-02-25
Filing date: 2023-02-21
Publication date: 2023-08-31

Abstract

This compound is represented by formula (1) or (2). (Each symbol in formulae (1) and (2) is defined in the description.) Also provided are an organic electroluminescent element that contains the compound, and an electronic device that includes the organic electroluminescent element.

Description

Compounds, materials for organic electroluminescence devices, organic electroluminescence devices, and electronic devices

The present invention relates to a compound, a material for an organic electroluminescence device, an organic electroluminescence device, and an electronic device including the organic electroluminescence device.

Generally, an organic electroluminescence element (hereinafter sometimes referred to as an "organic EL element") is composed of an anode, a cathode, and an organic layer sandwiched between the anode and the cathode. When a voltage is applied between the two electrodes, electrons are injected from the cathode side and holes from the anode side into the light-emitting region. It emits light when the state returns to the ground state. Therefore, development of a material that efficiently transports electrons or holes to the light-emitting region and facilitates recombination of electrons and holes is important for obtaining high-performance organic EL devices.

Patent Documents 1 to 11 disclose compounds used as materials for organic electroluminescence elements.

CN111666929A KR20210122382A KR20210124796A KR102267451B1 KR20210015615A KR20180080100A JP2021520360A CN110229071A KR20210015616A KR20180138333A KR20180079718A

Although many compounds for organic EL devices have been reported in the past, there is still a demand for compounds that further improve the performance of organic EL devices.

The present invention has been made to solve the above problems, and provides a compound that further improves the performance of an organic EL device, an organic EL device with improved device performance, and an electronic device containing such an organic EL device. intended to provide

The present inventors have extensively studied the performance of organic EL devices containing the compounds described in Patent Documents 1 to 11. As a result, organic EL devices containing compounds represented by the following formula (1) or (2) , the performance was found to be better.

In one aspect, the present invention provides a compound represented by formula (1) below.

(In the formula,
N ^* is the central nitrogen atom;
Ra and Rb are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, provided that Ra and Rb may be bonded to each other to form a substituted or unsubstituted spiro ring. may or may not be attached to each other and thus not form a spiro ring;
R ¹ to R ³ are hydrogen atoms, provided that at least one adjacent two selected from R ¹ to R ³ may combine with each other to form one or more unsubstituted benzene rings, may not be attached to each other and therefore not form a ring;
R ⁵ to R ⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 30 ring-forming atoms, provided that at least one adjacent two selected from R ⁵ to R ⁸ are bonded to each other to form one or more unsubstituted benzene rings or may not be attached to each other and thus not form a ring;
R ¹¹ to R ¹⁴ are hydrogen atoms, and adjacent two selected from R ¹¹ to R ¹⁴ are not bonded to each other and thus do not form a ring;
L ¹ and L ² are each independently a single bond or an unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, provided that the arylene group consists only of a 6-membered ring;
Ar ¹ and Ar ² each independently represent a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms, or the following formula (a ), provided that the aryl group consists only of a 6-membered ring. )

(In the formula,
*1 is the point of attachment to one or both of ^L1 and ^L2 ;
One of Rc and Rd is a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring atoms, or a substituted or unsubstituted 5 to 30 ring atoms. a heteroaryl group, the other being a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms;
provided that Rc and Rd may bind to each other to form a substituted or unsubstituted spiro ring, or may not bind to each other to form a spiro ring;
R ²¹ to R ²⁴ are hydrogen atoms, with the proviso that one selected from R ²¹ , R ²² and R ²³ is a single bond that bonds to *2 and is selected from R ²¹ to R ²⁴ that are not the single bond at least one adjacent two may be joined together to form one or more unsubstituted benzene rings or may not be joined together and thus do not form a ring;
R ²⁵ to R ²⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 30 ring-forming atoms, provided that at least one adjacent two selected from R ²⁵ to R ²⁸ are bonded to each other to form one or more unsubstituted benzene rings or may not be attached to each other and thus not form a ring. )

In another aspect, the present invention provides a compound represented by formula (2) below.

(In the formula,
N ^* is the central nitrogen atom;
Ra and Rb are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, provided that Ra and Rb may be bonded to each other to form a substituted or unsubstituted spiro ring. may or may not be attached to each other and thus not form a spiro ring;
R ¹ to R ³ are hydrogen atoms, provided that at least one adjacent two selected from R ¹ to R ³ may combine with each other to form one or more unsubstituted benzene rings, may not be attached to each other and therefore not form a ring;
R ⁵ to R ⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 30 ring-forming atoms, provided that at least one adjacent two selected from R ⁵ to R ⁸ are bonded to each other to form one or more unsubstituted benzene rings or may not be attached to each other and thus not form a ring;
R ¹¹ to R ¹⁴ are hydrogen atoms, and adjacent two selected from R ¹¹ to R ¹⁴ are not bonded to each other and thus do not form a ring;
L ³ is a single bond or a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, provided that the arylene group consists only of a 6-membered ring;
R ³¹ to R ³⁴ are hydrogen atoms, with the proviso that one selected from R ³¹ , R ³² and R ³³ is a single bond that binds to *3 and is selected from R ³¹ to R ³⁴ that is not a single bond at least one adjacent two may be joined together to form one or more unsubstituted benzene rings or may not be joined together and thus do not form a ring;
R ³⁵ to R ³⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 30 ring-forming atoms, provided that at least one adjacent two selected from R ³⁵ to R ³⁸ are bonded to each other to form one or more unsubstituted benzene rings or may not be attached to each other and thus not form a ring;
Ar ³ is a group represented by any of the following formulas (1a-2), (1c-2), (1d-2), (1e-2), (1f-2), or (1g). )

(In the formula,
*41 is the point of attachment to the central nitrogen atom N ^* ;
L ²¹ is a single bond or an unsubstituted biphenylene group;
R ¹⁸¹ to R ¹⁸⁵ each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, and adjacent two selected from R ¹⁸¹ to R ¹⁸⁵ are not bonded to each other; does not form a ring. )

(In the formula,
*24 is the point of attachment to the central nitrogen atom N ^* ;
L ²² is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
R ¹²¹ to R ¹²⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that one selected from R ¹²¹ to R ¹²⁸ is a single bond that bonds to *25, and two adjacent R ¹²¹ to R ¹²⁸ that are not single bonds are not bonded to each other, thus forming a ring. do not form )

(In the formula,
*26 is the point of attachment to the central nitrogen atom N ^* ;
L ²³ is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
R ¹³¹ to R ¹⁴⁰ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that one selected from R ¹³¹ to R ¹⁴⁰ is a single bond that bonds to *27, and two adjacent R ¹³¹ to R ¹⁴⁰ that are not single bonds are not bonded to each other, thus forming a ring. do not form )

(In the formula,
*42 is the point of attachment to the central nitrogen atom N ^* ;
L ²⁴ is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
Y is an oxygen atom, a sulfur atom, NR ^A or CR ^B R ^C ;
R ^A is a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
R ^B and R ^C are each independently a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that R ^B and R ^C may be bonded to each other to form a substituted or unsubstituted spiro ring, or may not be bonded to each other and thus do not form a spiro ring;
R ¹⁴¹ to R ¹⁴⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 13 ring-forming atoms;
with the proviso that one selected from R ¹⁴¹ to R ¹⁴⁸ , R ^A , R ^B , and R ^C is a single bond that bonds to *43;
when L ²⁴ is a single bond and Y is an oxygen atom or a sulfur atom, one selected from R ¹⁴² to R ¹⁴⁷ is a single bond that bonds to *43;
At least one adjacent two selected from R ¹⁴¹ to R ¹⁴⁸ which are not single bonds may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other, therefore It does not have to form a ring. )

(In the formula,
*30 is the point of attachment to the central nitrogen atom N ^* ;
L ²⁵ is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
R ¹⁵¹ to R ¹⁵⁵ are each independently a hydrogen atom, an unsubstituted alkyl group having 1 to 6 carbon atoms, or an unsubstituted phenyl group;
provided that one selected from R ¹⁵¹ to R ¹⁵⁵ is a single bond that bonds to *31, and the other one selected from R ¹⁵¹ to R ¹⁵⁵ is a single bond that bonds to *32;
Adjacent two selected from R ¹⁵¹ to R ¹⁵⁵ that are not the single bond that bonds to *31 nor the single bond that bonds to *32 are not bonded to each other and therefore do not form a ring;
R ¹⁶¹ to R ¹⁶⁵ and R ¹⁷¹ to R ¹⁷⁵ are each independently a hydrogen atom or an unsubstituted alkyl group having 1 to 6 carbon atoms;
However, at least one adjacent two selected from R ¹⁶¹ to R ¹⁶⁵ and R ¹⁷¹ to R ¹⁷⁵ may be bonded to each other to form one or more unsubstituted benzene rings, or and therefore do not form a ring. )

(In the formula,
*44 is the point of attachment to the central nitrogen atom N ^* ;
R ¹⁸¹ to R ¹⁸⁵ are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms;
with the proviso that one selected from R ¹⁸¹ , R ¹⁸² , R ¹⁸⁴ and R ¹⁸⁵ is a single bond that binds to *45;
adjacent two selected from R ¹⁸¹ , R ¹⁸² , R ¹⁸⁴ and R ¹⁸⁵ that are not single bonds bonded to R ¹⁸³ and *45 are not bonded to each other and thus do not form a ring;
R ¹⁹¹ to R ¹⁹⁵ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
Two adjacent groups selected from R ¹⁹¹ to R ¹⁹⁵ are not bonded to each other and thus do not form a ring. )

In another aspect, the present invention provides an organic EL device material containing the compound represented by the formula (1) or (2).

In still another aspect, the present invention is an organic electroluminescent device comprising a cathode, an anode, and an organic layer between the cathode and the anode, wherein the organic layer comprises a light-emitting layer, and at least one of the organic layers Provided is an organic electroluminescence device in which one layer contains the compound represented by the formula (1) or (2).

In still another aspect, the present invention provides an electronic device including the organic electroluminescence element.

An organic EL device containing the compound represented by formula (1) or (2) exhibits improved device performance.

1 is a schematic diagram showing an example of a layer structure of an organic EL element according to one aspect of the present invention; FIG. FIG. 4 is a schematic diagram showing another example of the layer structure of the organic EL element according to one aspect of the present invention; FIG. 4 is a schematic diagram showing another example of the layer structure of the organic EL element according to one aspect of the present invention;

[definition]
As used herein, a hydrogen atom includes isotopes with different neutron numbers, ie, protium, deuterium, and tritium.

In the present specification, in the chemical structural formula, a hydrogen atom, that is, a hydrogen atom, a deuterium atom, or Assume that the tritium atoms are bonded.

As used herein, the number of ring-forming carbon atoms refers to the ring itself of a compound having a structure in which atoms are bonded in a ring (e.g., monocyclic compounds, condensed ring compounds, bridged compounds, carbocyclic compounds, and heterocyclic compounds). represents the number of carbon atoms among the atoms that When the ring is substituted with a substituent, the carbon contained in the substituent is not included in the number of ring-forming carbon atoms. The same applies to the "number of ring-forming carbon atoms" described below unless otherwise specified. For example, a benzene ring has 6 ring carbon atoms, a naphthalene ring has 10 ring carbon atoms, a pyridine ring has 5 ring carbon atoms, and a furan ring has 4 ring carbon atoms. Further, for example, the 9,9-diphenylfluorenyl group has 13 ring-forming carbon atoms, and the 9,9′-spirobifluorenyl group has 25 ring-forming carbon atoms.
When the benzene ring is substituted with, for example, an alkyl group as a substituent, the number of carbon atoms in the alkyl group is not included in the number of ring-forming carbon atoms in the benzene ring. Therefore, the number of ring-forming carbon atoms in the benzene ring substituted with the alkyl group is 6. When the naphthalene ring is substituted with, for example, an alkyl group as a substituent, the number of carbon atoms in the alkyl group is not included in the number of carbon atoms in the naphthalene ring. Therefore, the naphthalene ring substituted with an alkyl group has 10 ring-forming carbon atoms.

In the present specification, the number of ring-forming atoms refers to compounds (e.g., monocyclic compounds, condensed ring compounds, bridged compounds, carbocyclic compound, and heterocyclic compound) represents the number of atoms constituting the ring itself. Atoms that do not constitute a ring (e.g., a hydrogen atom that terminates the bond of an atom that constitutes a ring) and atoms contained in substituents when the ring is substituted by substituents are not included in the number of ring-forming atoms. The same applies to the "number of ring-forming atoms" described below unless otherwise specified. For example, the pyridine ring has 6 ring-forming atoms, the quinazoline ring has 10 ring-forming atoms, and the furan ring has 5 ring-forming atoms. For example, hydrogen atoms bonded to the pyridine ring or atoms constituting substituents are not included in the number of atoms forming the pyridine ring. Therefore, the number of ring-forming atoms of the pyridine ring to which hydrogen atoms or substituents are bonded is 6. Further, for example, hydrogen atoms bonded to carbon atoms of the quinazoline ring or atoms constituting substituents are not included in the number of ring-forming atoms of the quinazoline ring. Therefore, the number of ring-forming atoms of the quinazoline ring to which hydrogen atoms or substituents are bonded is 10.

In the present specification, the expression "substituted or unsubstituted XX to YY carbon number ZZ group" represents the number of carbon atoms when the ZZ group is unsubstituted, and is substituted. Do not include the number of carbon atoms in the substituents. Here, "YY" is greater than "XX", "XX" means an integer of 1 or more, and "YY" means an integer of 2 or more.

In the present specification, the term “substituted or unsubstituted ZZ group having an atomic number of XX to YY”, “the atomic number of XX to YY” represents the number of atoms when the ZZ group is unsubstituted, and is substituted. Do not include the number of atoms of the substituents in the case. Here, "YY" is greater than "XX", "XX" means an integer of 1 or more, and "YY" means an integer of 2 or more.

In the present specification, an unsubstituted ZZ group represents a case where a "substituted or unsubstituted ZZ group" is an "unsubstituted ZZ group", and a substituted ZZ group is a "substituted or unsubstituted ZZ group". is a "substituted ZZ group".
As used herein, "unsubstituted" in the case of "substituted or unsubstituted ZZ group" means that a hydrogen atom in the ZZ group is not replaced with a substituent. A hydrogen atom in the "unsubstituted ZZ group" is a protium atom, a deuterium atom, or a tritium atom.
Further, in the present specification, "substituted" in the case of "substituted or unsubstituted ZZ group" means that one or more hydrogen atoms in the ZZ group are replaced with a substituent. "Substituted" in the case of "a BB group substituted with an AA group" similarly means that one or more hydrogen atoms in the BB group are replaced with an AA group.

"substituents described herein"
The substituents described in this specification are described below.

The number of ring-forming carbon atoms in the "unsubstituted aryl group" described herein is 6 to 50, preferably 6 to 30, more preferably 6 to 18, unless otherwise specified. .
The number of ring-forming atoms of the "unsubstituted heterocyclic group" described herein is 5 to 50, preferably 5 to 30, more preferably 5 to 18, unless otherwise specified. be.
The number of carbon atoms in the "unsubstituted alkyl group" described herein is 1-50, preferably 1-20, more preferably 1-6, unless otherwise specified.
The number of carbon atoms in the "unsubstituted alkenyl group" described herein is 2-50, preferably 2-20, more preferably 2-6, unless otherwise specified in the specification.
The number of carbon atoms in the "unsubstituted alkynyl group" described herein is 2-50, preferably 2-20, more preferably 2-6, unless otherwise specified in the specification.
The number of ring-forming carbon atoms in the "unsubstituted cycloalkyl group" described herein is 3 to 50, preferably 3 to 20, more preferably 3 to 6, unless otherwise specified. be.
The number of ring-forming carbon atoms of the "unsubstituted arylene group" described herein is 6 to 50, preferably 6 to 30, more preferably 6 to 18, unless otherwise specified. .
The number of ring-forming atoms of the "unsubstituted divalent heterocyclic group" described herein is 5 to 50, preferably 5 to 30, more preferably 5, unless otherwise specified herein. ~18.
The number of carbon atoms in the "unsubstituted alkylene group" described herein is 1-50, preferably 1-20, more preferably 1-6, unless otherwise specified.

・"Substituted or unsubstituted aryl group"
Specific examples of the "substituted or unsubstituted aryl group" described in the specification (specific example group G1) include the following unsubstituted aryl groups (specific example group G1A) and substituted aryl groups (specific example group G1B ) and the like. (Here, the unsubstituted aryl group refers to the case where the "substituted or unsubstituted aryl group" is the "unsubstituted aryl group", and the substituted aryl group is the "substituted or unsubstituted aryl group" It refers to a "substituted aryl group.") In the present specification, the term "aryl group" includes both "unsubstituted aryl group" and "substituted aryl group."
A "substituted aryl group" means a group in which one or more hydrogen atoms of an "unsubstituted aryl group" are replaced with a substituent. Examples of the "substituted aryl group" include, for example, a group in which one or more hydrogen atoms of the "unsubstituted aryl group" of Specific Example Group G1A below is replaced with a substituent, and a substituted aryl group of Specific Example Group G1B below. Examples include: The examples of the "unsubstituted aryl group" and the examples of the "substituted aryl group" listed here are only examples, and the "substituted aryl group" described herein includes the following specific examples A group in which the hydrogen atom bonded to the carbon atom of the aryl group itself in the "substituted aryl group" of Group G1B is further replaced with a substituent, and the hydrogen atom of the substituent in the "substituted aryl group" of Specific Example Group G1B below Furthermore, groups substituted with substituents are also included.

- Unsubstituted aryl group (specific example group G1A):
phenyl group,
a p-biphenyl group,
m-biphenyl group,
an o-biphenyl group,
p-terphenyl-4-yl group,
p-terphenyl-3-yl group,
p-terphenyl-2-yl group,
m-terphenyl-4-yl group,
m-terphenyl-3-yl group,
m-terphenyl-2-yl group,
o-terphenyl-4-yl group,
o-terphenyl-3-yl group,
o-terphenyl-2-yl group,
1-naphthyl group,
2-naphthyl group,
anthryl group,
benzoanthryl group,
a phenanthryl group,
a benzophenanthryl group,
a phenalenyl group,
a pyrenyl group,
a chrysenyl group,
a benzochrysenyl group,
a triphenylenyl group,
a benzotriphenylenyl group,
a tetracenyl group,
pentacenyl group,
fluorenyl group,
9,9′-spirobifluorenyl group,
a benzofluorenyl group,
a dibenzofluorenyl group,
a fluoranthenyl group,
a benzofluoranthenyl group,
A perylenyl group and a monovalent aryl group derived by removing one hydrogen atom from the ring structures represented by the following general formulas (TEMP-1) to (TEMP-15).

- Substituted aryl group (specific example group G1B):
an o-tolyl group,
m-tolyl group,
p-tolyl group,
para-xylyl group,
meta-xylyl group,
an ortho-xylyl group,
para-isopropylphenyl group,
meta-isopropylphenyl group,
an ortho-isopropylphenyl group,
para-t-butylphenyl group,
meta-t-butylphenyl group,
ortho-t-butylphenyl group,
3,4,5-trimethylphenyl group,
9,9-dimethylfluorenyl group,
9,9-diphenylfluorenyl group 9,9-bis(4-methylphenyl)fluorenyl group,
9,9-bis(4-isopropylphenyl)fluorenyl group,
9,9-bis(4-t-butylphenyl) fluorenyl group,
a cyanophenyl group,
a triphenylsilylphenyl group,
a trimethylsilylphenyl group,
a phenylnaphthyl group,
A naphthylphenyl group and a group in which one or more hydrogen atoms of a monovalent group derived from a ring structure represented by the general formulas (TEMP-1) to (TEMP-15) is replaced with a substituent.

・"Substituted or unsubstituted heterocyclic group"
As used herein, a "heterocyclic group" is a cyclic group containing at least one heteroatom as a ring-forming atom. Specific examples of heteroatoms include nitrogen, oxygen, sulfur, silicon, phosphorus, and boron atoms.
A "heterocyclic group" as described herein is a monocyclic group or a condensed ring group.
A "heterocyclic group" as described herein is either an aromatic heterocyclic group or a non-aromatic heterocyclic group.
Specific examples of the "substituted or unsubstituted heterocyclic group" described herein (specific example group G2) include the following unsubstituted heterocyclic groups (specific example group G2A), and substituted heterocyclic groups ( Specific example group G2B) and the like can be mentioned. (Here, unsubstituted heterocyclic group refers to the case where “substituted or unsubstituted heterocyclic group” is “unsubstituted heterocyclic group”, and substituted heterocyclic group refers to “substituted or unsubstituted "Heterocyclic group" refers to a "substituted heterocyclic group".) In the present specification, simply referring to a "heterocyclic group" means "unsubstituted heterocyclic group" and "substituted heterocyclic group". including both.
A "substituted heterocyclic group" means a group in which one or more hydrogen atoms of an "unsubstituted heterocyclic group" are replaced with a substituent. Specific examples of the "substituted heterocyclic group" include groups in which the hydrogen atoms of the "unsubstituted heterocyclic group" of the following specific example group G2A are replaced, and examples of the substituted heterocyclic groups of the following specific example group G2B. mentioned. The examples of the "unsubstituted heterocyclic group" and the examples of the "substituted heterocyclic group" listed here are only examples, and the "substituted heterocyclic group" described herein specifically includes A group in which the hydrogen atom bonded to the ring-forming atom of the heterocyclic group itself in the "substituted heterocyclic group" of Example Group G2B is further replaced with a substituent, and a substituent in the "substituted heterocyclic group" of Specific Example Group G2B A group in which the hydrogen atom of is further replaced with a substituent is also included.

Specific example group G2A includes, for example, the following nitrogen atom-containing unsubstituted heterocyclic groups (specific example group G2A1), oxygen atom-containing unsubstituted heterocyclic groups (specific example group G2A2), sulfur atom-containing unsubstituted (specific example group G2A3), and a monovalent heterocyclic group derived by removing one hydrogen atom from the ring structures represented by the following general formulas (TEMP-16) to (TEMP-33) (specific example group G2A4).

Specific example group G2B includes, for example, the following substituted heterocyclic group containing a nitrogen atom (specific example group G2B1), substituted heterocyclic group containing an oxygen atom (specific example group G2B2), substituted heterocyclic ring containing a sulfur atom group (specific example group G2B3), and one or more hydrogen atoms of a monovalent heterocyclic group derived from a ring structure represented by the following general formulas (TEMP-16) to (TEMP-33) as a substituent Including substituted groups (example group G2B4).

- an unsubstituted heterocyclic group containing a nitrogen atom (specific example group G2A1):
pyrrolyl group,
an imidazolyl group,
a pyrazolyl group,
a triazolyl group,
a tetrazolyl group,
an oxazolyl group,
an isoxazolyl group,
an oxadiazolyl group,
a thiazolyl group,
an isothiazolyl group,
a thiadiazolyl group,
a pyridyl group,
a pyridazinyl group,
a pyrimidinyl group,
pyrazinyl group,
a triazinyl group,
an indolyl group,
an isoindolyl group,
an indolizinyl group,
a quinolidinyl group,
quinolyl group,
an isoquinolyl group,
cinnolyl group,
a phthalazinyl group,
a quinazolinyl group,
a quinoxalinyl group,
a benzimidazolyl group,
an indazolyl group,
a phenanthrolinyl group,
a phenanthridinyl group,
acridinyl group,
phenazinyl group,
a carbazolyl group,
a benzocarbazolyl group,
a morpholino group,
a phenoxazinyl group,
a phenothiazinyl group,
an azacarbazolyl group and a diazacarbazolyl group;

- an unsubstituted heterocyclic group containing an oxygen atom (specific example group G2A2):
furyl group,
an oxazolyl group,
an isoxazolyl group,
an oxadiazolyl group,
xanthenyl group,
benzofuranyl group,
an isobenzofuranyl group,
a dibenzofuranyl group,
a naphthobenzofuranyl group,
a benzoxazolyl group,
a benzisoxazolyl group,
a phenoxazinyl group,
a morpholino group,
a dinaphthofuranyl group,
an azadibenzofuranyl group,
a diazadibenzofuranyl group,
azanaphthobenzofuranyl group and diazanaphthobenzofuranyl group;

- an unsubstituted heterocyclic group containing a sulfur atom (specific example group G2A3):
thienyl group,
a thiazolyl group,
an isothiazolyl group,
a thiadiazolyl group,
benzothiophenyl group (benzothienyl group),
isobenzothiophenyl group (isobenzothienyl group),
dibenzothiophenyl group (dibenzothienyl group),
naphthobenzothiophenyl group (naphthobenzothienyl group),
a benzothiazolyl group,
a benzoisothiazolyl group,
a phenothiazinyl group,
a dinaphthothiophenyl group (dinaphthothienyl group),
azadibenzothiophenyl group (azadibenzothienyl group),
diazadibenzothiophenyl group (diazadibenzothienyl group),
Azanaphthobenzothiophenyl group (azanaphthobenzothienyl group) and diazanaphthobenzothiophenyl group (diazanaphthobenzothienyl group).

- A monovalent heterocyclic group derived by removing one hydrogen atom from the ring structures represented by the following general formulas (TEMP-16) to (TEMP-33) (specific example group G2A4):

In general formulas (TEMP-16) to (TEMP-33), X _A and Y _A are each independently an oxygen atom, a sulfur atom, NH, or CH ₂ . However, at least one of X _A and Y _A is an oxygen atom, a sulfur atom, or NH.
In the general formulas (TEMP-16) to (TEMP-33), when at least one of X _A and Y _A is NH or CH ₂ , in the general formulas (TEMP-16) to (TEMP-33) The monovalent heterocyclic groups derived from the represented ring structures include monovalent groups obtained by removing one hydrogen atom from these NH or _CH2 .

- A substituted heterocyclic group containing a nitrogen atom (specific example group G2B1):
(9-phenyl)carbazolyl group,
(9-biphenylyl)carbazolyl group,
(9-phenyl) phenylcarbazolyl group,
(9-naphthyl)carbazolyl group,
diphenylcarbazol-9-yl group,
a phenylcarbazol-9-yl group,
a methylbenzimidazolyl group,
ethylbenzimidazolyl group,
a phenyltriazinyl group,
a biphenylyltriazinyl group,
a diphenyltriazinyl group,
a phenylquinazolinyl group and a biphenylylquinazolinyl group;

- A substituted heterocyclic group containing an oxygen atom (specific example group G2B2):
phenyldibenzofuranyl group,
methyldibenzofuranyl group,
A t-butyldibenzofuranyl group and a monovalent residue of spiro[9H-xanthene-9,9′-[9H]fluorene].

- A substituted heterocyclic group containing a sulfur atom (specific example group G2B3):
a phenyldibenzothiophenyl group,
a methyldibenzothiophenyl group,
A t-butyldibenzothiophenyl group and a monovalent residue of spiro[9H-thioxanthene-9,9′-[9H]fluorene].

- A group in which one or more hydrogen atoms of a monovalent heterocyclic group derived from a ring structure represented by the general formulas (TEMP-16) to (TEMP-33) is replaced with a substituent (specific example group G2B4 ):

The "one or more hydrogen atoms of the monovalent heterocyclic group" means that at least one of the hydrogen atoms bonded to the ring-forming carbon atoms of the monovalent heterocyclic group, XA and YA is NH. one or more hydrogen atoms selected from a hydrogen atom bonded to a nitrogen atom when one of XA and YA is CH2, and a hydrogen atom of a methylene group when one of XA and YA is CH2.

・ "Substituted or unsubstituted alkyl group"
Specific examples of the "substituted or unsubstituted alkyl group" described in the specification (specific example group G3) include the following unsubstituted alkyl groups (specific example group G3A) and substituted alkyl groups (specific example group G3B ). (Here, an unsubstituted alkyl group refers to a case where a "substituted or unsubstituted alkyl group" is an "unsubstituted alkyl group", and a substituted alkyl group is a case where a "substituted or unsubstituted alkyl group" is It refers to a "substituted alkyl group".) Hereinafter, simply referred to as an "alkyl group" includes both an "unsubstituted alkyl group" and a "substituted alkyl group".
A "substituted alkyl group" means a group in which one or more hydrogen atoms in an "unsubstituted alkyl group" are replaced with a substituent. Specific examples of the "substituted alkyl group" include groups in which one or more hydrogen atoms in the following "unsubstituted alkyl group" (specific example group G3A) are replaced with substituents, and substituted alkyl groups (specific examples Examples of group G3B) and the like can be mentioned. As used herein, the alkyl group in the "unsubstituted alkyl group" means a chain alkyl group. Therefore, the "unsubstituted alkyl group" includes a linear "unsubstituted alkyl group" and a branched "unsubstituted alkyl group". The examples of the "unsubstituted alkyl group" and the examples of the "substituted alkyl group" listed here are only examples, and the "substituted alkyl group" described herein includes specific example group G3B A group in which the hydrogen atom of the alkyl group itself in the "substituted alkyl group" of Specific Example Group G3B is further replaced with a substituent, and a group in which the hydrogen atom of the substituent in the "substituted alkyl group" of Specific Example Group G3B is further replaced by a substituent included.

- Unsubstituted alkyl group (specific example group G3A):
methyl group,
ethyl group,
n-propyl group,
isopropyl group,
n-butyl group,
isobutyl group,
s-butyl group, and t-butyl group.

- Substituted alkyl group (specific example group G3B):
a heptafluoropropyl group (including isomers),
pentafluoroethyl group,
2,2,2-trifluoroethyl group and trifluoromethyl group;

・ "Substituted or unsubstituted alkenyl group"
Specific examples of the "substituted or unsubstituted alkenyl group" described in the specification (specific example group G4) include the following unsubstituted alkenyl groups (specific example group G4A) and substituted alkenyl groups (specific example group G4B) and the like. (Here, unsubstituted alkenyl group refers to the case where "substituted or unsubstituted alkenyl group" is "unsubstituted alkenyl group", and "substituted alkenyl group" means "substituted or unsubstituted alkenyl group ” is a “substituted alkenyl group”.) In the present specification, simply referring to an “alkenyl group” includes both an “unsubstituted alkenyl group” and a “substituted alkenyl group”.
A "substituted alkenyl group" means a group in which one or more hydrogen atoms in an "unsubstituted alkenyl group" are replaced with a substituent. Specific examples of the "substituted alkenyl group" include groups in which the following "unsubstituted alkenyl group" (specific example group G4A) has a substituent, and substituted alkenyl groups (specific example group G4B). be done. The examples of the "unsubstituted alkenyl group" and the examples of the "substituted alkenyl group" listed here are only examples, and the "substituted alkenyl group" described herein includes specific example group G4B A group in which the hydrogen atom of the alkenyl group itself in the "substituted alkenyl group" of Specific Example Group G4B is further replaced with a substituent, and a group in which the hydrogen atom of the substituent in the "substituted alkenyl group" of Specific Example Group G4B is further replaced by a substituent included.

- Unsubstituted alkenyl group (specific example group G4A):
a vinyl group,
allyl group,
1-butenyl group,
2-butenyl group, and 3-butenyl group.

- Substituted alkenyl group (specific example group G4B):
1,3-butandienyl group,
1-methylvinyl group,
1-methylallyl group,
1,1-dimethylallyl group,
a 2-methylallyl group and a 1,2-dimethylallyl group;

・ "Substituted or unsubstituted alkynyl group"
Specific examples of the "substituted or unsubstituted alkynyl group" described in the specification (specific example group G5) include the following unsubstituted alkynyl groups (specific example group G5A). (Here, the unsubstituted alkynyl group refers to the case where a "substituted or unsubstituted alkynyl group" is an "unsubstituted alkynyl group".) Hereinafter, simply referred to as an "alkynyl group" means "unsubstituted includes both "alkynyl group" and "substituted alkynyl group".
A "substituted alkynyl group" means a group in which one or more hydrogen atoms in an "unsubstituted alkynyl group" are replaced with a substituent. Specific examples of the "substituted alkynyl group" include groups in which one or more hydrogen atoms in the following "unsubstituted alkynyl group" (specific example group G5A) are replaced with substituents.

- Unsubstituted alkynyl group (specific example group G5A):
ethynyl group

・ "Substituted or unsubstituted cycloalkyl group"
Specific examples of the "substituted or unsubstituted cycloalkyl group" described in the specification (specific example group G6) include the following unsubstituted cycloalkyl groups (specific example group G6A), and substituted cycloalkyl groups ( Specific example group G6B) and the like can be mentioned. (Here, unsubstituted cycloalkyl group refers to the case where "substituted or unsubstituted cycloalkyl group" is "unsubstituted cycloalkyl group", and substituted cycloalkyl group refers to "substituted or unsubstituted It refers to the case where "cycloalkyl group" is "substituted cycloalkyl group".) In the present specification, simply referring to "cycloalkyl group" means "unsubstituted cycloalkyl group" and "substituted cycloalkyl group". including both.
A "substituted cycloalkyl group" means a group in which one or more hydrogen atoms in an "unsubstituted cycloalkyl group" are replaced with a substituent. Specific examples of the "substituted cycloalkyl group" include groups in which one or more hydrogen atoms in the following "unsubstituted cycloalkyl group" (specific example group G6A) are replaced with substituents, and substituted cycloalkyl groups (Specific example group G6B) and the like. The examples of the "unsubstituted cycloalkyl group" and the examples of the "substituted cycloalkyl group" listed here are only examples, and the "substituted cycloalkyl group" described herein specifically includes A group in which one or more hydrogen atoms bonded to a carbon atom of the cycloalkyl group itself in the “substituted cycloalkyl group” of Example Group G6B is replaced with a substituent, and in the “substituted cycloalkyl group” of Specific Example Group G6B A group in which a hydrogen atom of a substituent is further replaced with a substituent is also included.

- Unsubstituted cycloalkyl group (specific example group G6A):
a cyclopropyl group,
cyclobutyl group,
a cyclopentyl group,
a cyclohexyl group,
1-adamantyl group,
2-adamantyl group,
1-norbornyl group and 2-norbornyl group.

- Substituted cycloalkyl group (specific example group G6B):
4-methylcyclohexyl group;

- "A group represented by -Si (R ₉₀₁ ) (R ₉₀₂ ) (R ₉₀₃ )"
Specific examples of the group represented by —Si(R ₉₀₁ )(R ₉₀₂ )(R ₉₀₃ ) described in the specification (specific example group G7) include:
-Si(G1)(G1)(G1),
- Si (G1) (G2) (G2),
- Si (G1) (G1) (G2),
-Si(G2)(G2)(G2),
-Si(G3)(G3)(G3) and -Si(G6)(G6)(G6)
is mentioned. here,
G1 is a "substituted or unsubstituted aryl group" described in specific example group G1.
G2 is a "substituted or unsubstituted heterocyclic group" described in Specific Example Group G2.
G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3.
G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6.
A plurality of G1's in -Si(G1)(G1)(G1) are the same or different from each other.
A plurality of G2 in -Si (G1) (G2) (G2) are the same or different from each other.
A plurality of G1's in -Si(G1)(G1)(G2) are the same or different from each other.
A plurality of G2 in -Si(G2)(G2)(G2) are the same or different from each other.
A plurality of G3 in -Si(G3)(G3)(G3) are the same or different from each other.
A plurality of G6 in -Si(G6)(G6)(G6) are the same or different from each other.

- "A group represented by -O- (R ₉₀₄ )"
Specific examples of the group represented by —O—(R ₉₀₄ ) described in the specification (specific example group G8) include:
-O(G1),
-O(G2),
-O (G3), and -O (G6)
are mentioned.
here,
G1 is a "substituted or unsubstituted aryl group" described in specific example group G1.
G2 is a "substituted or unsubstituted heterocyclic group" described in Specific Example Group G2.
G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3.
G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6.

- "A group represented by -S- (R ₉₀₅ )"
Specific examples of the group represented by -S-(R ₉₀₅ ) described in the specification (specific example group G9) include:
-S(G1),
-S(G2),
-S (G3) and -S (G6)
is mentioned.
here,
G1 is a "substituted or unsubstituted aryl group" described in specific example group G1.
G2 is a "substituted or unsubstituted heterocyclic group" described in Specific Example Group G2.
G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3.
G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6.

- "A group represented by -N (R ₉₀₆ ) (R ₉₀₇ )"
Specific examples of the group represented by —N(R ₉₀₆ )(R ₉₀₇ ) described in the specification (specific example group G10) include:
- N (G1) (G1),
-N(G2)(G2),
- N (G1) (G2),
-N (G3) (G3) and -N (G6) (G6)
are mentioned.
here,
G1 is a "substituted or unsubstituted aryl group" described in specific example group G1.
G2 is a "substituted or unsubstituted heterocyclic group" described in Specific Example Group G2.
G3 is a "substituted or unsubstituted alkyl group" described in specific example group G3.
G6 is a "substituted or unsubstituted cycloalkyl group" described in specific example group G6.
A plurality of G1's in -N(G1)(G1) are the same or different from each other.
A plurality of G2 in -N(G2)(G2) are the same or different from each other.
A plurality of G3s in -N(G3)(G3) are the same or different from each other.
A plurality of G6 in -N(G6)(G6) are the same or different from each other.

・"Halogen atom"
Specific examples of the "halogen atom" described in this specification (specific example group G11) include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, and the like.

・ "Substituted or unsubstituted fluoroalkyl group"
The "substituted or unsubstituted fluoroalkyl group" described in this specification means that at least one hydrogen atom bonded to a carbon atom constituting the alkyl group in the "substituted or unsubstituted alkyl group" is replaced with a fluorine atom. Also includes a group (perfluoro group) in which all hydrogen atoms bonded to carbon atoms constituting the alkyl group in the "substituted or unsubstituted alkyl group" are replaced with fluorine atoms. The carbon number of the “unsubstituted fluoroalkyl group” is 1-50, preferably 1-30, more preferably 1-18, unless otherwise specified in the specification. A "substituted fluoroalkyl group" means a group in which one or more hydrogen atoms of a "fluoroalkyl group" are replaced with a substituent. In addition, the "substituted fluoroalkyl group" described in this specification includes a group in which one or more hydrogen atoms bonded to the carbon atoms of the alkyl chain in the "substituted fluoroalkyl group" are further replaced with a substituent, and A group in which one or more hydrogen atoms of a substituent in a "substituted fluoroalkyl group" is further replaced with a substituent is also included. Specific examples of the "unsubstituted fluoroalkyl group" include groups in which one or more hydrogen atoms in the above "alkyl group" (specific example group G3) are replaced with fluorine atoms.

- "substituted or unsubstituted haloalkyl group"
"Substituted or unsubstituted haloalkyl group" described herein means that at least one hydrogen atom bonded to a carbon atom constituting the alkyl group in the "substituted or unsubstituted alkyl group" is replaced with a halogen atom Also includes a group in which all hydrogen atoms bonded to carbon atoms constituting the alkyl group in the "substituted or unsubstituted alkyl group" are replaced with halogen atoms. The carbon number of the “unsubstituted haloalkyl group” is 1-50, preferably 1-30, more preferably 1-18, unless otherwise specified in the specification. A "substituted haloalkyl group" means a group in which one or more hydrogen atoms of a "haloalkyl group" are replaced with a substituent. In addition, the "substituted haloalkyl group" described in this specification includes a group in which one or more hydrogen atoms bonded to the carbon atoms of the alkyl chain in the "substituted haloalkyl group" are further replaced with a substituent group, and a "substituted A group in which one or more hydrogen atoms of the substituent in the "haloalkyl group of" is further replaced with a substituent is also included. Specific examples of the "unsubstituted haloalkyl group" include groups in which one or more hydrogen atoms in the above "alkyl group" (specific example group G3) are replaced with halogen atoms. A haloalkyl group may be referred to as a halogenated alkyl group.

・ "Substituted or unsubstituted alkoxy group"
Specific examples of the “substituted or unsubstituted alkoxy group” described in this specification are groups represented by —O(G3), where G3 is the “substituted or unsubstituted alkyl group". The carbon number of the "unsubstituted alkoxy group" is 1-50, preferably 1-30, more preferably 1-18, unless otherwise specified in the specification.

・ "Substituted or unsubstituted alkylthio group"
A specific example of the "substituted or unsubstituted alkylthio group" described in this specification is a group represented by -S(G3), wherein G3 is the "substituted or unsubstituted alkyl group". The carbon number of the "unsubstituted alkylthio group" is 1-50, preferably 1-30, more preferably 1-18, unless otherwise specified in the specification.

・ "Substituted or unsubstituted aryloxy group"
Specific examples of the “substituted or unsubstituted aryloxy group” described in this specification are groups represented by —O(G1), where G1 is the “substituted or an unsubstituted aryl group". The number of ring-forming carbon atoms in the "unsubstituted aryloxy group" is 6-50, preferably 6-30, more preferably 6-18, unless otherwise specified in the specification.

・"Substituted or unsubstituted arylthio group"
A specific example of the "substituted or unsubstituted arylthio group" described in this specification is a group represented by -S(G1), where G1 is the "substituted or unsubstituted unsubstituted aryl group". The number of ring-forming carbon atoms in the "unsubstituted arylthio group" is 6-50, preferably 6-30, more preferably 6-18, unless otherwise specified in the specification.

・"Substituted or unsubstituted trialkylsilyl group"
Specific examples of the "trialkylsilyl group" described in this specification are groups represented by -Si(G3)(G3)(G3), where G3 is the group described in Specific Example Group G3. It is a "substituted or unsubstituted alkyl group". A plurality of G3 in -Si(G3)(G3)(G3) are the same or different from each other. The number of carbon atoms in each alkyl group of the "trialkylsilyl group" is 1-50, preferably 1-20, more preferably 1-6, unless otherwise specified in the specification.

・"Substituted or unsubstituted aralkyl group"
A specific example of the "substituted or unsubstituted aralkyl group" described in this specification is a group represented by -(G3)-(G1), wherein G3 is the group described in Specific Example Group G3. It is a "substituted or unsubstituted alkyl group", and G1 is a "substituted or unsubstituted aryl group" described in specific example group G1. Therefore, an "aralkyl group" is a group in which a hydrogen atom of an "alkyl group" is replaced with an "aryl group" as a substituent, and is one aspect of a "substituted alkyl group". An "unsubstituted aralkyl group" is an "unsubstituted alkyl group" substituted with an "unsubstituted aryl group", and the number of carbon atoms in the "unsubstituted aralkyl group" is unless otherwise specified herein. , 7-50, preferably 7-30, more preferably 7-18.
Specific examples of the "substituted or unsubstituted aralkyl group" include a benzyl group, 1-phenylethyl group, 2-phenylethyl group, 1-phenylisopropyl group, 2-phenylisopropyl group, phenyl-t-butyl group, α -naphthylmethyl group, 1-α-naphthylethyl group, 2-α-naphthylethyl group, 1-α-naphthylisopropyl group, 2-α-naphthylisopropyl group, β-naphthylmethyl group, 1-β-naphthylethyl group , 2-β-naphthylethyl group, 1-β-naphthylisopropyl group, and 2-β-naphthylisopropyl group.

A substituted or unsubstituted aryl group described herein is preferably a phenyl group, p-biphenyl group, m-biphenyl group, o-biphenyl group, p-terphenyl- 4-yl group, p-terphenyl-3-yl group, p-terphenyl-2-yl group, m-terphenyl-4-yl group, m-terphenyl-3-yl group, m-terphenyl- 2-yl group, o-terphenyl-4-yl group, o-terphenyl-3-yl group, o-terphenyl-2-yl group, 1-naphthyl group, 2-naphthyl group, anthryl group, phenanthryl group , pyrenyl group, chrysenyl group, triphenylenyl group, fluorenyl group, 9,9′-spirobifluorenyl group, 9,9-dimethylfluorenyl group, and 9,9-diphenylfluorenyl group.

The substituted or unsubstituted heterocyclic groups described herein are preferably pyridyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, quinazolinyl, benzimidazolyl, phenyl, unless otherwise stated herein. nantholinyl group, carbazolyl group (1-carbazolyl group, 2-carbazolyl group, 3-carbazolyl group, 4-carbazolyl group, or 9-carbazolyl group), benzocarbazolyl group, azacarbazolyl group, diazacarbazolyl group , dibenzofuranyl group, naphthobenzofuranyl group, azadibenzofuranyl group, diazadibenzofuranyl group, dibenzothiophenyl group, naphthobenzothiophenyl group, azadibenzothiophenyl group, diazadibenzothiophenyl group, ( 9-phenyl)carbazolyl group ((9-phenyl)carbazol-1-yl group, (9-phenyl)carbazol-2-yl group, (9-phenyl)carbazol-3-yl group, or (9-phenyl)carbazole -4-yl group), (9-biphenylyl)carbazolyl group, (9-phenyl)phenylcarbazolyl group, diphenylcarbazol-9-yl group, phenylcarbazol-9-yl group, phenyltriazinyl group, biphenylyl group riazinyl group, diphenyltriazinyl group, phenyldibenzofuranyl group, phenyldibenzothiophenyl group and the like.

In the present specification, a carbazolyl group is specifically any one of the following groups unless otherwise specified in the specification.

As used herein, the (9-phenyl)carbazolyl group is specifically any of the following groups unless otherwise specified in the specification.

In the general formulas (TEMP-Cz1) to (TEMP-Cz9), * represents a binding position.

As used herein, a dibenzofuranyl group and a dibenzothiophenyl group are specifically any of the following groups, unless otherwise specified.

In the general formulas (TEMP-34) to (TEMP-41), * represents the binding position.

The substituted or unsubstituted alkyl groups described herein are preferably methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, and t- butyl group and the like.

・"Substituted or unsubstituted arylene group"
Unless otherwise specified, the "substituted or unsubstituted arylene group" described herein is derived from the above "substituted or unsubstituted aryl group" by removing one hydrogen atom on the aryl ring. is the base of the valence. Specific examples of the “substituted or unsubstituted arylene group” (specific example group G12) include the “substituted or unsubstituted aryl group” described in specific example group G1 by removing one hydrogen atom on the aryl ring. Induced divalent groups and the like can be mentioned.

・ "Substituted or unsubstituted divalent heterocyclic group"
Unless otherwise specified, the "substituted or unsubstituted divalent heterocyclic group" described herein is the above "substituted or unsubstituted heterocyclic group" except that one hydrogen atom on the heterocyclic ring is removed. is a divalent group derived from Specific examples of the "substituted or unsubstituted divalent heterocyclic group" (specific example group G13) include one hydrogen on the heterocyclic ring from the "substituted or unsubstituted heterocyclic group" described in specific example group G2. Examples include divalent groups derived by removing atoms.

・ "Substituted or unsubstituted alkylene group"
Unless otherwise specified, the "substituted or unsubstituted alkylene group" described herein is derived from the above "substituted or unsubstituted alkyl group" by removing one hydrogen atom on the alkyl chain. is the base of the valence. Specific examples of the “substituted or unsubstituted alkylene group” (specific example group G14) include the “substituted or unsubstituted alkyl group” described in specific example group G3 by removing one hydrogen atom on the alkyl chain. Induced divalent groups and the like can be mentioned.

The substituted or unsubstituted arylene group described in this specification is preferably any group of the following general formulas (TEMP-42) to (TEMP-68), unless otherwise specified in this specification.

In general formulas (TEMP-42) to (TEMP-52), Q ₁ to Q ₁₀ each independently represent a hydrogen atom or a substituent.
In the general formulas (TEMP-42) to (TEMP-52), * represents a binding position.

In general formulas (TEMP-53) to (TEMP-62), Q ₁ to Q ₁₀ each independently represent a hydrogen atom or a substituent.
Formulas _Q9 and _Q10 may be linked together through a single bond to form a ring.
In the general formulas (TEMP-53) to (TEMP-62), * represents a bonding position.

In general formulas (TEMP-63) to (TEMP-68), Q ₁ to Q ₈ are each independently a hydrogen atom or a substituent.
In the general formulas (TEMP-63) to (TEMP-68), * represents a bonding position.

The substituted or unsubstituted divalent heterocyclic group described herein is preferably any group of the following general formulas (TEMP-69) to (TEMP-102), unless otherwise specified herein is.

In general formulas (TEMP-69) to (TEMP-82), Q ₁ to Q ₉ are each independently a hydrogen atom or a substituent.

In general formulas (TEMP-83) to (TEMP-102), Q ₁ to Q ₈ are each independently a hydrogen atom or a substituent.

The above is the description of the "substituents described in this specification".

・"When combining to form a ring"
In the present specification, "one or more pairs of two or more adjacent pairs are bonded to each other to form a substituted or unsubstituted monocyclic ring, or bonded to each other to form a substituted or unsubstituted condensed ring The phrases "form or are not bonded to each other" refer to "at least one pair of two or more adjacent pairs bonded together to form a substituted or unsubstituted monocyclic ring" and "adjacent are bonded to each other to form a substituted or unsubstituted condensed ring" and "one or more adjacent pairs of two or more are not bonded to each other. ' means if.
In the present specification, when "one or more pairs of two or more adjacent pairs are bonded to each other to form a substituted or unsubstituted monocyclic ring", and "one of two or more adjacent pairs In the case where two or more groups combine with each other to form a substituted or unsubstituted condensed ring (hereinafter, these cases may be collectively referred to as "the case where they combine to form a ring"), the following ,explain. An anthracene compound represented by the following general formula (TEMP-103) having an anthracene ring as a base skeleton will be described as an example.

For example, when "one or more pairs of two or more adjacent pairs of R ₉₂₁ to R ₉₃₀ are combined to form a ring", is a pair of R ₉₂₁ and R ₉₂₂ , a pair of R ₉₂₂ and R ₉₂₃ , a pair of R ₉₂₃ and R ₉₂₄ , a pair of R ₉₂₄ and R ₉₃₀ , a pair of R ₉₃₀ and R ₉₂₅ , R ₉₂₅ and R ₉₂₆ , R ₉₂₆ and R ₉₂₇ , R ₉₂₇ and R ₉₂₈ , R ₉₂₈ and R ₉₂₉ , and R ₉₂₉ and R ₉₂₁ .

The above-mentioned "one or more pairs" means that two or more of the groups consisting of two or more adjacent groups may form a ring at the same time. For example, when R ₉₂₁ and R ₉₂₂ are bonded together to form ring Q _A , and R ₉₂₅ and R ₉₂₆ are bonded together to form ring Q _B , the general formula (TEMP-103) The represented anthracene compound is represented by the following general formula (TEMP-104).

The case where "a group consisting of two or more adjacent pairs" forms a ring is not limited to the case where a group consisting of two adjacent "two" is combined as in the above example, but It also includes the case where a pair is combined. For example, R ₉₂₁ and R ₉₂₂ are bonded together to form ring Q _A , and R ₉₂₂ and R ₉₂₃ are bonded together to form ring Q _C , and the adjacent three (R ₉₂₁ , R ₉₂₂ and R ₉₂₃ ) are combined to form a ring and condensed to the anthracene base skeleton. In this case, the anthracene compound represented by the general formula (TEMP-103) has It is represented by the general formula (TEMP-105). In the general formula (TEMP-105) below, ring Q _A and ring Q _C share R ₉₂₂ .

The "monocyclic ring" or "condensed ring" to be formed may be a saturated ring or an unsaturated ring as the structure of only the formed ring. Even when "one pair of adjacent pairs" forms a "single ring" or a "fused ring", the "single ring" or "fused ring" is a saturated ring, or Unsaturated rings can be formed. For example, ring Q _A and ring Q _B formed in the general formula (TEMP-104) are each a “monocyclic ring” or a “fused ring”. Moreover, the ring Q _A and the ring Q _C formed in the general formula (TEMP-105) are “fused rings”. Ring Q _A and ring Q _C in the general formula (TEMP-105) form a condensed ring by condensing ring Q _A and ring Q _C. If the ring Q _A in the general formula (TEMP-104) is a benzene ring, the ring Q _A is monocyclic. When the ring Q _A of the general formula (TEMP-104) is a naphthalene ring, the ring Q _A is a condensed ring.

"Unsaturated ring" means an aromatic hydrocarbon ring or an aromatic heterocyclic ring. A "saturated ring" means an aliphatic hydrocarbon ring or a non-aromatic heterocyclic ring.
Specific examples of the aromatic hydrocarbon ring include structures in which the groups listed as specific examples in the specific example group G1 are terminated with a hydrogen atom.
Specific examples of the aromatic heterocyclic ring include structures in which the aromatic heterocyclic groups listed as specific examples in the specific example group G2 are terminated with a hydrogen atom.
Specific examples of the aliphatic hydrocarbon ring include structures in which the groups listed as specific examples in the specific example group G6 are terminated with a hydrogen atom.
"Forming a ring" means forming a ring only with a plurality of atoms of the mother skeleton, or with a plurality of atoms of the mother skeleton and one or more arbitrary elements. For example, the ring Q _A formed by combining R ₉₂₁ and R ₉₂₂ shown in the general formula (TEMP-104) has the carbon atom of the anthracene skeleton to which R ₉₂₁ is bonded and the anthracene skeleton to which R ₉₂₂ is bonded. It means a ring formed by a skeleton carbon atom and one or more arbitrary elements. As a specific example, when R ₉₂₁ and R ₉₂₂ form a ring Q _A , the carbon atom of the anthracene skeleton to which R ₉₂₁ is bound, the carbon atom of the anthracene skeleton to which R ₉₂₂ is bound, and four carbon atoms and form a monocyclic unsaturated ring, the ring formed by R ₉₂₁ and R ₉₂₂ is a benzene ring.

Here, the "arbitrary element" is preferably at least one element selected from the group consisting of carbon element, nitrogen element, oxygen element, and sulfur element, unless otherwise specified in this specification. In any element (for example, in the case of a carbon element or a nitrogen element), a bond that does not form a ring may be terminated with a hydrogen atom or the like, or may be substituted with an "optional substituent" described later. When it contains any element other than the carbon atom, the ring formed is a heterocycle.
"One or more arbitrary elements" constituting a single ring or condensed ring are preferably 2 or more and 15 or less, more preferably 3 or more and 12 or less, unless otherwise specified in the present specification. , more preferably 3 or more and 5 or less.
Among "monocyclic ring" and "condensed ring", "monocyclic ring" is preferred, unless otherwise stated in the present specification.
Of the "saturated ring" and the "unsaturated ring", the "unsaturated ring" is preferred, unless otherwise specified in the present specification.
Unless otherwise stated herein, "monocyclic" is preferably a benzene ring.
Unless otherwise stated herein, the "unsaturated ring" is preferably a benzene ring.
When "one or more pairs of two or more adjacent pairs" are "bonded to each other to form a substituted or unsubstituted monocyclic ring", or "bonded to each other to form a substituted or unsubstituted condensed ring When forming, unless otherwise stated herein, preferably one or more sets of two or more adjacent groups are bonded together to form a plurality of atoms of the backbone and 1 or more 15 It forms a substituted or unsubstituted "unsaturated ring" with at least one element selected from the group consisting of the following carbon, nitrogen, oxygen and sulfur elements.

When the above "monocyclic ring" or "condensed ring" has a substituent, the substituent is, for example, the "optional substituent" described later. Specific examples of substituents in the case where the above "monocyclic ring" or "condensed ring" has a substituent are the substituents described in the section "Substituents described herein" above.
When the above "saturated ring" or "unsaturated ring" has a substituent, the substituent is, for example, the "optional substituent" described later. Specific examples of substituents in the case where the above "monocyclic ring" or "condensed ring" has a substituent are the substituents described in the section "Substituents described herein" above.
The above is the case where "one or more pairs of two or more adjacent pairs are bonded to each other to form a substituted or unsubstituted monocyclic ring", and "one or more pairs of two or more adjacent pairs are combined with each other to form a substituted or unsubstituted condensed ring"("combine to form a ring").

- Substituent in the case of "substituted or unsubstituted" In one embodiment of the present specification, the substituent in the case of "substituted or unsubstituted" (herein referred to as "optional substituent") ) is, for example, an unsubstituted alkyl group having 1 to 50 carbon atoms,
an unsubstituted alkenyl group having 2 to 50 carbon atoms,
an unsubstituted alkynyl group having 2 to 50 carbon atoms,
an unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms,
—Si(R ₉₀₁ ) (R ₉₀₂ ) (R ₉₀₃ ),
—O—(R ₉₀₄ ),
-S-(R ₉₀₅ ),
-N(R ₉₀₆ )(R ₉₀₇ ),
halogen atom, cyano group, nitro group,
a group selected from the group consisting of an unsubstituted aryl group having 6 to 50 ring-forming carbon atoms and an unsubstituted heterocyclic group having 5 to 50 ring-forming atoms;
Here, R ₉₀₁ to R ₉₀₇ are each independently
hydrogen atom,
a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms,
a substituted or unsubstituted cycloalkyl group having 3 to 50 ring carbon atoms,
It is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 50 ring atoms.
when two or more R ₉₀₁ are present, the two or more R ₉₀₁ are the same or different from each other,
when two or more R ₉₀₂ are present, the two or more R ₉₀₂ are the same or different from each other;
when two or more R ₉₀₃ are present, the two or more R ₉₀₃ are the same or different from each other,
when two or more R ₉₀₄ are present, the two or more R ₉₀₄ are the same or different from each other;
when two or more R ₉₀₅ are present, the two or more R ₉₀₅ are the same or different from each other,
when two or more R ₉₀₆ are present, the two or more R ₉₀₆ are the same or different from each other;
When two or more R ₉₀₇ are present, the two or more R ₉₀₇ are the same or different from each other.

In one embodiment, the substituents referred to above as "substituted or unsubstituted" are
an alkyl group having 1 to 50 carbon atoms,
It is a group selected from the group consisting of an aryl group having 6 to 50 ring carbon atoms and a heterocyclic group having 5 to 50 ring atoms.

In one embodiment, the substituents referred to above as "substituted or unsubstituted" are
an alkyl group having 1 to 18 carbon atoms,
It is a group selected from the group consisting of an aryl group having 6 to 18 ring carbon atoms and a heterocyclic group having 5 to 18 ring atoms.

Specific examples of each group of the above optional substituents are specific examples of the substituents described in the section "Substituents described in the specification" above.

Unless otherwise stated in this specification, any adjacent substituents may form a “saturated ring” or an “unsaturated ring”, preferably a substituted or unsubstituted saturated 5 forming a membered ring, a substituted or unsubstituted saturated 6-membered ring, a substituted or unsubstituted unsaturated 5-membered ring, or a substituted or unsubstituted unsaturated 6-membered ring, more preferably a benzene ring do.
Unless stated otherwise herein, any substituent may have further substituents. Substituents further possessed by the optional substituents are the same as the above optional substituents.

In this specification, the numerical range represented using "AA to BB" has the numerical value AA described before "AA to BB" as the lower limit, and the numerical value BB described after "AA to BB" as the upper limit.

The compounds of the present invention are described below.
The compound of the present invention is represented by the above formula (1) or (2). Hereinafter, symbols in formulas (1) or (2) and formulas (1) or (2), which will be described later, will be described. Identical symbols have the same meaning unless otherwise indicated.
Hereinafter, the compounds of the present invention represented by formulas (1) or (2) and formulas (1) or (2), which will be described later, may be referred to as "invention compounds".

The first compound of the present invention (invention compound (1)) is represented by the following formula (1).

N ^* is the central nitrogen atom.

Ra and Rb are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, preferably substituted or unsubstituted 1 to 30 carbon atoms, preferably 1 to 18 carbon atoms, more preferably 1 ∼6 alkyl groups.
In one aspect of the present invention, preferably Ra and Rb are each independently an unsubstituted alkyl group having 1 to 6 carbon atoms.
The unsubstituted alkyl group of the substituted or unsubstituted alkyl group having 1 to 30 carbon atoms is, for example,
methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, t-butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, is an undecyl group or a dodecyl group;
preferably methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, t-butyl group, or pentyl group;
more preferably methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, or t-butyl group;
more preferably a methyl group, an ethyl group, an isopropyl group or a t-butyl group;
A methyl group is particularly preferred.
Ra and Rb may be bonded to each other to form a substituted or unsubstituted spiro ring, or may not be bonded to each other to form a spiro ring.
The spiro ring is a hydrocarbon ring or hetero ring, and is selected from a monocyclic ring, a condensed ring, a bridged bicyclo ring, and a bridged tricyclo ring. Examples of substituted or unsubstituted spiro rings are shown below, but are not limited thereto. * indicates the bonding position of the fluorene skeleton to the benzene ring.

R ¹ to R ³ are hydrogen atoms, provided that two adjacent ones selected from R ¹ to R ³ , that is, one or both of R ¹ and R ² and R ² and R ³ are bonded to each other to form 1 or Multiple unsubstituted benzene rings may be formed, or they may not be bonded to each other and thus not form a ring.

R ⁵ to R ⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted A heteroaryl group (aromatic heterocyclic group) having 5 to 30 ring atoms, preferably a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or a substituted or unsubstituted 6 ring carbon atoms to 30 aryl groups, more preferably hydrogen atoms or substituted or unsubstituted alkyl groups having 1 to 30 carbon atoms, more preferably hydrogen atoms.
All of R ⁵ to R ⁸ may be hydrogen atoms.

Details of the substituted or unsubstituted alkyl group having 1 to 30 carbon atoms are as described for Ra and Rb.
The unsubstituted aryl group of the substituted or unsubstituted aryl group having 6 to 30, preferably 6 to 18, more preferably 6 to 12 ring-forming carbon atoms is, for example,
phenyl group, biphenyl group, terphenyl group, naphthyl group, anthryl group, benzoanthryl group, phenanthryl group, benzophenanthryl group, pyrenyl group, chrysenyl group, benzochrysenyl group, fluorenyl group, fluoranthenyl group, perylenyl group, or a triphenylenyl group;
preferably a phenyl group, a biphenyl group, a terphenyl group, or a naphthyl group;
More preferably, phenyl group, 2-, 3- or 4-biphenylyl group, 2-, 3- or 4-o-terphenylyl group, 2-, 3- or 4-m-terphenylyl group, 2-, a 3- or 4-p-terphenylyl group, or a 1- or 2-naphthyl group;
more preferably a phenyl group, a 2-, 3-, or 4-biphenylyl group, or a 1- or 2-naphthyl group;
A phenyl group is particularly preferred.
A substituted or unsubstituted heteroaryl group having 5 to 30, preferably 5 to 20, more preferably 5 to 13 ring-forming atoms is, for example,
pyrrolyl group, furyl group, thienyl group, pyridyl group, imidazopyridyl group, pyridazinyl group, pyrimidinyl group, pyrazinyl group, triazinyl group, imidazolyl group, oxazolyl group, thiazolyl group, pyrazolyl group, isoxazolyl group, isothiazolyl group, oxadiazolyl group, thiadiazolyl group, triazolyl group, tetrazolyl group, indolyl group, isoindolyl group, indolizinyl group, quinolidinyl group, quinolyl group, isoquinolyl group, cinnolyl group, phthalazinyl group, quinazolinyl group, quinoxalinyl group, benzimidazolyl group, benzoxazolyl group, benzothiazolyl group, indazolyl group, benzoisoxazolyl group, benzoisothiazolyl group, phenanthridinyl group, acridinyl group, phenanthrolinyl group, phenazinyl group, phenothiazinyl group, phenoxazinyl group, xanthenyl group, benzofuranyl group, isobenzofuran nyl group, naphthobenzofuranyl group, dibenzofuranyl group, benzothiophenyl group (benzothienyl group, hereinafter the same), isobenzothiophenyl group (isobenzothienyl group, hereinafter the same), naphthobenzothiophenyl group (naphthobenzo thienyl group, hereinafter the same), dibenzothiophenyl group (dibenzothienyl group, hereinafter the same), or carbazolyl group (9-carbazolyl group, or 1-, 2-, 3- or 4-carbazolyl group, hereinafter the same .) and;
Benzofuranyl group, isobenzofuranyl group, naphthobenzofuranyl group, dibenzofuranyl group, benzothiophenyl group, isobenzothiophenyl group, naphthobenzothiophenyl group, dibenzothiophenyl group or carbazolyl group are preferred. ,
Dibenzofuranyl group, dibenzothiophenyl group, or carbazolyl group is more preferred.

Adjacent two selected from R ⁵ to R ⁸ , that is, at least one adjacent two selected from R ⁵ and R ⁶ , R ⁶ and R ⁷ , and R ⁷ and R ⁸ are bonded together to form 1 or Multiple unsubstituted benzene rings may be formed, or they may not be bonded to each other and thus not form a ring.

R ¹¹ to R ¹⁴ are hydrogen atoms, and adjacent two selected from R ¹¹ to R ¹⁴ are not bonded to each other and therefore do not form a ring.

L ¹ and L ² are each independently a single bond or an unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, provided that the arylene group consists only of a 6-membered ring.
The unsubstituted arylene group of the substituted or unsubstituted arylene group having 6 to 30, preferably 6 to 18, more preferably ⁶ to ¹² ring-forming carbon atoms is, for example, the unsubstituted A divalent group obtained by removing one hydrogen atom from an aryl group (consisting of only a 6-membered ring), preferably o-, m- or p-phenylene group, 4,4'- , 4,3′- or 4,2′-biphenylene group, or 1,4- or 2,6-naphthylene group, more preferably o-, m- or p-phenylene group.
Both L ¹ and L ² may be single bonds, one may be a single bond and the other may be a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, both may be substituted or unsubstituted It may be a substituted arylene group having 6 to 30 ring-forming carbon atoms.

Ar ¹ and Ar ² each independently represent a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms, or the following formula (a ), provided that the aryl group consists only of a 6-membered ring.
The details of the substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and the substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms are as described for R ⁵ to R ⁸ .

The formula (a) is represented by the following formula.

*1 is the binding position to one or both of ^L1 and ^L2 .

One of Rc and Rd is a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring atoms, or a substituted or unsubstituted 5 to 30 ring atoms. It is a heteroaryl group, and the other is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms.
Preferably one of Rc and Rd is a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, and the other is a substituted or unsubstituted ring carbon atom It is an aryl group of number 6-30.
The details of the substituted or unsubstituted alkyl group having 1 to 30 carbon atoms are as described for Ra and Rb. The details of the substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and the substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms are as described for R ⁵ to R ⁸ .
In a particularly preferred embodiment of the invention, one of Rc and Rd is methyl or phenyl and the other is phenyl.

Rc and Rd may be bonded to each other to form a substituted or unsubstituted spiro ring, or may not be bonded to each other to form a spiro ring.
Details of the substituted or unsubstituted spiro ring are as described for Ra and Rb.

R ²¹ to R ²⁴ are hydrogen atoms. However, one selected from R ²¹ , R ²² and R ²³ , preferably R ²² or R ²³ , more preferably R ²² is a single bond that binds to *2. At least one adjacent two selected from R ²¹ to R ²⁴ which are not single bonds may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other to form a ring You don't have to.
All of R ²¹ to R ²⁴ which are not single bonds may be hydrogen atoms.

R ²⁵ to R ²⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted A heteroaryl group having 5 to 30 ring atoms, preferably a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring atoms, and more A hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms is preferred, and a hydrogen atom is more preferred.
Details of the substituted or unsubstituted alkyl group having 1 to 30 carbon atoms are as described for Ra and Rb. The details of the substituted or unsubstituted aryl having 6 to 30 ring carbon atoms and the substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms are as described for R ⁵ to R ⁸ .
at least one adjacent pair selected from R ²⁵ to R ²⁸ , that is, at least one adjacent pair selected from R ²⁵ and R ²⁶ , R ²⁶ and R ²⁷ , and R ²⁷ and R ²⁸ are bonded to each other; They may form one or more unsubstituted benzene rings, or may not be bonded together and thus form no ring.
All of R ²⁵ to R ²⁸ may be hydrogen atoms.

Formula (a) is preferably represented by the following formula. In the following formula, R is omitted for simplification.

In a preferred embodiment of the present invention, Ar ¹ and Ar ² are each independently selected from formula (a) above and formulas (1a), (1c), (1d), (1e), and (1f) below. .

Formula (1a) is represented by the following formula.

*21 is the binding position to one or both of ^L1 and ^L2 .

R ¹⁰¹ to R ¹⁰⁵ and R ¹⁰⁶ to R ¹¹⁰ are each independently a hydrogen atom, an unsubstituted alkyl group having 1 to 6 carbon atoms, or an unsubstituted aryl group having 6 to 12 ring carbon atoms. However, one selected from R ¹⁰¹ to R ¹⁰⁵ is a single bond that bonds to *22, and one selected from R ¹⁰⁶ to R ¹¹⁰ is a single bond that bonds to *23.
The details of the unsubstituted alkyl group having 1 to 6 carbon atoms are as described for Ra and Rb in formula (1), except that the group has 1 to 6 carbon atoms.
The details of the unsubstituted aryl group having 6 to 12 ring-forming carbon atoms are as described for R ⁵ to R ⁸ in formula (1), except that the ring-forming carbon number is 6 to 12.
Adjacent two groups selected from R ¹⁰¹ to R ¹⁰⁵ which are not single bonds are not bonded to each other and thus do not form a ring.
Adjacent two groups selected from R ¹⁰⁶ to R ¹¹⁰ which are not single bonds are not bonded to each other and thus do not form a ring.
All of R ¹⁰¹ to R ¹⁰⁵ which are not single bonds may be hydrogen atoms.
All of R ¹⁰⁶ to R ¹¹⁰ which are not single bonds may be hydrogen atoms.

m is 0 or 1 and n is 0 or 1;
In one aspect of the invention, m is 0 and n is 0. In this case, *23 represents *21, and formula (1a) is represented by the following formula.

In another aspect of the invention, m is 1 and n is 0. In this case, *23 represents *22, and formula (1a) is represented by the following formula.

In another aspect of the invention, m is 0 and n is 1. In this case, *22 represents *21, and formula (1a) is represented by the following formula.

In another aspect of the invention, m is 1 and n is 1. In this case, formula (1a) is represented by the following formula.

R ¹¹¹ to R ¹¹⁵ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 13 ring-forming atoms.
two adjacent ones selected from R ¹¹¹ to R ¹¹⁵ , that is, at least one adjacent two selected from R ¹¹¹ and R ¹¹² , R ¹¹² and R ¹¹³ , R ¹¹³ and R ¹¹⁴ , and R ¹¹⁴ and R ¹¹⁵ , They may be joined together to form one or more unsubstituted benzene rings, or may not be joined together, thus forming no ring.
The details of the substituted or unsubstituted alkyl group having 1 to 6 carbon atoms are as described for Ra and Rb in formula (1), except that the group has 1 to 6 carbon atoms.
The details of the substituted or unsubstituted aryl group having 6 to 12 ring-forming carbon atoms are as described for R ⁵ to R ⁸ in formula (1), except that the ring-forming carbon number is 6 to 12. .
The details of the substituted or unsubstituted heteroaryl group having 5 to 13 ring-forming atoms are as described for R ⁵ to R ⁸ in formula (1), except that the number of ring-forming atoms is 5 to 13. be.
All of R ¹¹¹ to R ¹¹⁵ may be hydrogen atoms.

The group represented by formula (1a) is preferably represented by the following formula. In the following formula, R is omitted for simplification.

Formula (1c) is represented by the following formula.

*24 is the binding position to one or both of ^L1 and ^L2 .
R ¹²¹ to R ¹²⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms.
provided that one selected from R ¹²¹ to R ¹²⁸ is a single bond that bonds to *25, and two adjacent R ¹²¹ to R ¹²⁸ that are not single bonds are not bonded to each other, thus forming a ring. do not form
The details of the unsubstituted alkyl group having 1 to 6 carbon atoms are as described for Ra and Rb in formula (1), except that the group has 1 to 6 carbon atoms.
The details of the unsubstituted aryl group having 6 to 12 ring-forming carbon atoms are as described for R ⁵ to R ⁸ in formula (1), except that the ring-forming carbon number is 6 to 12.
In one aspect of the present invention, R ¹²¹ is preferably a single bond that bonds to *25, and in another aspect, R ¹²² is preferably a single bond that bonds to *25.
All of R ¹²¹ to R ¹²⁸ which are not single bonds may be hydrogen atoms.

Formula (1d) is represented by the following formula.

*26 is the binding position to one or both of ^L1 and ^L2 .
R ¹³¹ to R ¹⁴⁰ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms.
provided that one selected from R ¹³¹ to R ¹⁴⁰ is a single bond that bonds to *27, and two adjacent R ¹³¹ to R ¹⁴⁰ that are not single bonds are not bonded to each other, thus forming a ring. do not form
The details of the unsubstituted alkyl group having 1 to 6 carbon atoms are as described for Ra and Rb in formula (1), except that the group has 1 to 6 carbon atoms.
The details of the unsubstituted aryl group having 6 to 12 ring-forming carbon atoms are as described for R ⁵ to R ⁸ in formula (1), except that the ring-forming carbon number is 6 to 12.
One selected from R ¹³¹ , R ¹³² and R ¹⁴⁰ is preferably a single bond that bonds to *27. In one aspect of the invention, R ¹³¹ , R ¹³² in another aspect, and R ¹⁴⁰ in yet another aspect, is a single bond attached to *27.
All of R ¹³¹ to R ¹⁴⁰ which are not single bonds may be hydrogen atoms.

Formula (1e) is represented by the following formula.

(In the formula,
*28 is the binding position to one or both of ^L1 and ^L2 .
X is an oxygen atom, a sulfur atom, or ^NRA .
R ^A is a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms.
R ¹⁴¹ to R ¹⁴⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 13 ring atoms.
However, one selected from R ¹⁴¹ to R ¹⁴⁸ and R ^A is a single bond that binds to *29.
At least one adjacent two selected from R ¹⁴¹ to R ¹⁴⁸ which are not single bonds may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other. It does not have to form a ring.

Formula (1e) is represented by either of the following formulae.

The details of the substituted or unsubstituted alkyl group having 1 to 6 carbon atoms are as described for Ra and Rb in formula (1), except that the group has 1 to 6 carbon atoms.
The details of the substituted or unsubstituted aryl group having 6 to 12 ring-forming carbon atoms are as described for R ⁵ to R ⁸ in formula (1), except that the ring-forming carbon number is 6 to 12. .
The details of the substituted or unsubstituted heteroaryl group having 5 to 13 ring-forming atoms are as described for R ⁵ to R ⁸ in formula (1), except that the number of ring-forming atoms is 5 to 13. be.
All of R ¹⁴¹ to R ¹⁴⁸ which are not single bonds may be hydrogen atoms.

When X is an oxygen atom or a sulfur atom, preferably one selected from R ¹⁴¹ to R ¹⁴⁴ is a single bond that bonds to *29.
When X is NR ^A , preferably one selected from R ¹⁴¹ to R ¹⁴⁴ and R ^A is a single bond attached to *29.
^RA is particularly preferably a single bond or an unsubstituted phenyl group bonded to *29.

Formula (1f) is represented by the following formula.

*30 is the binding position to one or both of ^L1 and ^L2 .
R ¹⁵¹ to R ¹⁵⁵ are each independently a hydrogen atom, an unsubstituted alkyl group having 1 to 6 carbon atoms, or an unsubstituted phenyl group.
However, one selected from R ¹⁵¹ to R ¹⁵⁵ is a single bond that bonds to *31, and the other one selected from R ¹⁵¹ to R ¹⁵⁵ is a single bond that bonds to *32.
Adjacent two selected from R ¹⁵¹ to R ¹⁵⁵ which are neither single bond bonded to *31 nor single bond bonded to *32 are not bonded to each other and thus do not form a ring.
R ¹⁶¹ to R ¹⁶⁵ and R ¹⁷¹ to R ¹⁷⁵ are each independently a hydrogen atom or an unsubstituted alkyl group having 1 to 6 carbon atoms.
However, at least one adjacent two selected from R ¹⁶¹ to R ¹⁶⁵ may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other to form a ring You don't have to. At least one adjacent two selected from R ¹⁷¹ to R ¹⁷⁵ may be bonded to each other to form one or more unsubstituted benzene rings, or are not bonded to each other and thus do not form a ring. may

The details of the unsubstituted alkyl group having 1 to 6 carbon atoms are as described for Ra and Rb in formula (1), except that the group has 1 to 6 carbon atoms.
All of R ¹⁵¹ to R 155 that are neither single bonds that bond to *31 nor single bonds that bond to *32 may be hydrogen atoms, and all of R ¹⁶¹ ^{to R 165} ^are hydrogen atoms. or all of R ¹⁷¹ to R ¹⁷⁵ may be hydrogen atoms.

Formula (1f) includes groups represented by the following formulas (1fa) to (1fe), with formula (1fa), (1fb) or (1fe) being preferred.

Ar ¹ and Ar ² are each independently preferably a group represented by formula (a), (1a), (1c), (1e) or (1f), more preferably formula (a) , (1a), (1e) or (1f), more preferably a group represented by formula (a), (1a) or (1e).
In one aspect of the present invention, at least one of Ar ¹ and Ar ² is preferably a group represented by formula (a), (1a) or (1e).

The second compound of the present invention (invention compound (2)) is represented by the following formula (2).

Each symbol included in formula (2) is described below. In formula (2), ^N ^* , Ra, Rb, R ¹ to R ³ , R ⁵ to R ⁸ , and ^R as defined in
L ³ is a single bond or a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, provided that the arylene group consists only of 6-membered rings. The details of the substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms are as described for Ra and Rb in formula (1).
R ³¹ to R ³⁴ are hydrogen atoms, with the proviso that one selected from R ³¹ , R ³² and R ³³ is a single bond that binds to *3 and is selected from R ³¹ to R ³⁴ that is not a single bond At least one adjacent two may be bonded together to form one or more unsubstituted benzene rings or may not be bonded together and thus do not form a ring.
It is particularly preferred that R ³² is a single bond attached to *3.
R ³⁵ to R ³⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 30 ring-forming atoms, provided that at least one adjacent two selected from R ³⁵ to R ³⁸ are bonded to each other to form one or more unsubstituted benzene rings or may not be attached to each other and thus not form a ring.
The details of the substituted or unsubstituted alkyl group having 1 to 30 carbon atoms are as described for Ra and Rb in formula (1).
The details of the substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms and the substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming atoms are described with respect to R ⁵ to R ⁸ in formula (1). That's right.
Ar ³ is any one of the following formulas (1a-2), (1c-2), (1d-2), (1e-2), (1f-2), or (1g), preferably (1a-2) , (1c-2), (1e-2), (1f-2), or (1g), more preferably (1a-2), (1e-2), (1f-2), or ( 1g), more preferably (1a-2), (1e-2) or (1g), particularly preferably a group represented by formula (1e-2).

Formula (1a-2) is represented by the following formula.

During the ceremony,
*41 is the point of attachment to the central nitrogen atom N ^* ;
L ²¹ is a single bond or an unsubstituted biphenylene group;
R ¹⁸¹ to R ¹⁸⁵ each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, and adjacent two selected from R ¹⁸¹ to R ¹⁸⁵ are not bonded to each other; does not form a ring.
The details of the substituted or unsubstituted alkyl group having 1 to 6 carbon atoms are as described for Ra and Rb in formula (1), except that the group has 1 to 6 carbon atoms.
All of R ¹⁸¹ to R ¹⁸⁵ may be hydrogen atoms.

Formula (1c-2) is represented by the following formula.

During the ceremony,
*24 is the point of attachment to the central nitrogen atom N ^* ;
L ²² is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
R ¹²¹ to R ¹²⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that one selected from R ¹²¹ to R ¹²⁸ is a single bond that bonds to *25, and two adjacent R ¹²¹ to R ¹²⁸ that are not single bonds are not bonded to each other, thus forming a ring. do not form
Formula (1c-2) is the same as formula (1c) except that L ²² is present.
The details of the unsubstituted arylene group having 6 to 12 ring carbon atoms represented by L ²² are as described for L ¹ and L ² , except that the ring carbon atoms are 6 to 12.

Formula (1d-2) is represented by the following formula.

During the ceremony,
*26 is the point of attachment to the central nitrogen atom N ^* ;
L ²³ is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
R ¹³¹ to R ¹⁴⁰ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that one selected from R ¹³¹ to R ¹⁴⁰ is a single bond that bonds to *27, and two adjacent R ¹³¹ to R ¹⁴⁰ that are not single bonds are not bonded to each other, thus forming a ring. do not form
Formula (1d-2) is the same as formula (1d) except that L ²³ is present.
The details of the unsubstituted arylene group having 6 to 12 ring carbon atoms represented by L ²³ are as described for L ¹ and L ² , except that the ring carbon atoms are 6 to 12.

Formula (1e-2) is represented by the following formula.

During the ceremony,
*42 is the point of attachment to the central nitrogen atom N ^* ;
L ²⁴ is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
Y is an oxygen atom, a sulfur atom, NR ^A or CR ^B R ^C ;
R ^A is a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
R ^B and R ^C are each independently a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that R ^B and R ^C may be bonded to each other to form a substituted or unsubstituted spiro ring, or may not be bonded to each other and thus do not form a spiro ring;
R ¹⁴¹ to R ¹⁴⁸ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 13 ring-forming atoms;
provided that one selected from R ¹⁴¹ to R ¹⁴⁸ , R ^A , R ^B and R ^C is a single bond that binds to *43;
when L ²⁴ is a single bond and Y is an oxygen atom or a sulfur atom, one selected from R ¹⁴² to R ¹⁴⁷ is a single bond that bonds to *43;
At least one adjacent two selected from R ¹⁴¹ to R ¹⁴⁸ which are not single bonds may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other, therefore It does not have to form a ring.

The details of the unsubstituted arylene group having 6 to 12 ring-forming carbon atoms are as described for L ¹ and L ² , except that the ring-forming carbon number is 6 to 12.
Details of R ^A are as described for R ^A in formula (1e). ^RA is particularly preferably a single bond or an unsubstituted phenyl group bonded to *43.
The details of the substituted or unsubstituted spiro ring optionally formed by R ^B and R ^C are as described for Ra and Rb in formula (1).
The details of the substituted or unsubstituted alkyl group having 1 to 6 carbon atoms represented by R ^B , R ^C and R ¹⁴¹ to R ¹⁴⁸ are Ra and As described for Rb.
The details of the substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms represented by R ^B , R ^C and R ¹⁴¹ to R ¹⁴⁸ are the ) are as described for R ⁵ to R ⁸ of ).
The details of the substituted ^or unsubstituted heteroaryl group having 5 to 13 ring atoms represented by R ¹⁴¹ to R ¹⁴⁸ are R 5 to R 5 to R 148 of formula (1), except that the number of ring atoms is 5 to 13. As described for ^R8 .
All of R ¹⁴¹ to R ¹⁴⁸ which are not single bonds may be hydrogen atoms.

when L ²⁴ is a single bond and Y is an oxygen atom or a sulfur atom, preferably one selected from R ¹⁴² to R ¹⁴⁴ , more preferably a single bond in which R ¹⁴² or R ¹⁴⁴ is bonded to *43 is.
When L ²⁴ is an unsubstituted arylene group having 6 to 12 ring-forming carbon atoms, and Y is an oxygen atom or a sulfur atom, preferably one selected from R ¹⁴¹ to R ¹⁴⁴ is a single compound bonded to *43. It is a bond.
When Y is NR ^A , preferably one selected from R ¹⁴¹ to R ¹⁴⁴ and ^RA , more preferably R ¹⁴² , R ¹⁴³ or R ¹⁴⁴ , still more preferably R ¹⁴² or R ¹⁴³ is bound to *43 is a single bond that
When Y is CR ^B R ^C , preferably one selected from R ¹⁴¹ to R ¹⁴⁴ , more preferably R ¹⁴² or R ¹⁴³ , still more preferably R ¹⁴³ is a single bond that bonds to *43. It is particularly preferred that both R ^B and R ^C are unsubstituted phenyl groups or unsubstituted methyl groups, or one is an unsubstituted phenyl group and the other is an unsubstituted methyl group.

Formula (1f-2) is represented by the following formula.

During the ceremony,
*30 is the point of attachment to the central nitrogen atom N ^* ;
L ²⁵ is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
R ¹⁵¹ to R ¹⁵⁵ are each independently a hydrogen atom, an unsubstituted alkyl group having 1 to 6 carbon atoms, or an unsubstituted phenyl group;
provided that one selected from R ¹⁵¹ to R ¹⁵⁵ is a single bond that bonds to *31, and the other one selected from R ¹⁵¹ to R ¹⁵⁵ is a single bond that bonds to *32;
Adjacent two selected from R ¹⁵¹ to R ¹⁵⁵ that are not the single bond that bonds to *31 nor the single bond that bonds to *32 are not bonded to each other and therefore do not form a ring;
R ¹⁶¹ to R ¹⁶⁵ and R ¹⁷¹ to R ¹⁷⁵ are each independently a hydrogen atom or an unsubstituted alkyl group having 1 to 6 carbon atoms;
However, at least one adjacent two selected from R ¹⁶¹ to R ¹⁶⁵ and R ¹⁷¹ to R ¹⁷⁵ may be bonded to each other to form one or more unsubstituted benzene rings, or and therefore do not form a ring.

Formula (1f-2) is the same as formula (1f) except that L ²⁵ is present.
The details of the unsubstituted arylene group having 6 to 12 ring carbon atoms represented by L ²⁵ are as described for L ¹ and L ² , except that the ring carbon atoms are 6 to 12.

Formula (1g) is represented by the following formula.

During the ceremony,
*50 is the point of attachment to the central nitrogen atom N ^* ;
R ¹⁸¹ to R ¹⁸⁵ are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms;
with the proviso that one selected from R ¹⁸¹ , R ¹⁸² , R ¹⁸⁴ and R ¹⁸⁵ is a single bond that binds to *51;
adjacent two selected from R ¹⁸¹ , R ¹⁸² , R ¹⁸⁴ and R ¹⁸⁵ that are not single bonds bonded to R ¹⁸³ and *51 are not bonded to each other and thus do not form a ring;
R ¹⁹¹ to R ¹⁹⁵ are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
Two adjacent groups selected from R ¹⁹¹ to R ¹⁹⁵ are not bonded to each other and thus do not form a ring.

The details of the substituted or unsubstituted alkyl group having 1 to 6 carbon atoms represented by R ¹⁸¹ to R ¹⁸⁵ and R ¹⁹¹ to R ¹⁹⁵ are Ra and As described for Rb.
Details of the substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms represented by R ¹⁹¹ to R ¹⁹⁵ are R ⁵ to R ⁸ of formula (1) except that the ring carbon atoms are 6 to 12. It is as described with respect to
All of R ¹⁸¹ to R ¹⁸⁵ may be hydrogen atoms.
All of R ¹⁹¹ to R ¹⁹⁵ may be hydrogen atoms.

As noted above, "hydrogen atom" as used herein includes protium, deuterium, and tritium atoms. Accordingly, invention compounds may contain naturally occurring deuterium atoms.
Alternatively, deuterium atoms may be intentionally introduced into the invention compound A by using a deuterated compound as part or all of the raw material compound. Accordingly, in one aspect of the invention, the compounds of the invention contain at least one deuterium atom. That is, the compound of the invention may be a compound represented by formula (1) or (2), wherein at least one hydrogen atom contained in the compound is a deuterium atom.

At least one hydrogen atom selected from the following hydrogen atoms may be a deuterium atom. In the following description, “substituted or unsubstituted”, number of carbon atoms and number of atoms are omitted for simplification.
Hydrogen atoms represented by Ra and Rb of formula (1);
Hydrogen atoms possessed by alkyl groups represented by Ra and Rb of formula (1);
A hydrogen atom of a spiro ring optionally formed by Ra and Rb of formula (1);
hydrogen atoms represented by R ¹ to R ³ , R ⁵ to R ⁸ , and R ¹¹ to R ¹⁴ of formula (1);
A hydrogen atom possessed by an alkyl group, an aryl group, or a heteroaryl group represented by R ⁵ to R ⁸ of formula (1);
Hydrogen atoms possessed by aryl groups represented by L ¹ and L ² of formula (1);
A hydrogen atom possessed by the aryl group or heteroaryl group represented by Ar ¹ and Ar ² of formula (1), or the fluorene residue represented by formula (a);
Hydrogen atoms represented by Ra and Rb of formula (2);
Hydrogen atoms possessed by alkyl groups represented by Ra and Rb of formula (2);
A hydrogen atom of a spiro ring optionally formed by Ra and Rb of formula (2);
hydrogen atoms represented by R ¹ to R ³ , R ⁵ to R ⁸ , and R ¹¹ to R ¹⁴ in formula (2);
hydrogen atoms of the alkyl groups, aryl groups, or heteroaryl groups represented by R ⁵ to R ⁸ of formula (2);
hydrogen atom of the aryl group represented by L ³ of formula (2);
hydrogen atoms represented by R ³¹ to R ³⁴ in formula (2);
hydrogen atoms represented by R ³⁵ to R ³⁸ in formula (2);
A hydrogen atom possessed by the methyl group at the 9-position of the 9,9-dimethylfluorene structure bonded to L ³ of formula (2);
A hydrogen atom possessed by an alkyl group, an aryl group, or a heteroaryl group represented by R ³⁵ to R ³⁸ in formula (2);
A hydrogen atom of formula (1a-2), (1c-2), (1d-2), (1e-2), (1f-2), or (1g) represented by Ar3 of formula (2).

The deuteration rate of the invention compound depends on the deuteration rate of the starting compound used. Even if a raw material with a given deuteration rate is used, it may still contain a certain proportion of natural proton isotopes. Therefore, the aspect of the deuteration rate of the compound of the invention shown below is the ratio obtained by simply counting the number of deuterium atoms represented by the chemical formula, and the ratio in consideration of trace isotopes derived from nature. included.
The deuteration rate of the compound of the invention is preferably 1% or more, more preferably 3% or more, still more preferably 5% or more, still more preferably 10% or more, and even more preferably 50% or more.

Invention compounds may be mixtures containing deuterated and non-deuterated compounds, mixtures of two or more compounds having different deuteration rates. The deuteration rate of such a mixture is preferably 1% or more, more preferably 3% or more, still more preferably 5% or more, even more preferably 10% or more, even more preferably 50% or more, and 100% or more. %.
Further, the ratio of the number of deuterium atoms to the total number of hydrogen atoms in the compound of the invention is preferably 1% or more, more preferably 3% or more, still more preferably 5% or more, still more preferably 10% or more, and 100 % or less.

When the "substituted or unsubstituted XX group" included in the definition of each formula above is a substituted XX group, the details of the substituent are as described in "Substituent in the case of "substituted or unsubstituted"". , preferably an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 12 ring carbon atoms, or an aromatic heterocyclic group having 5 to 13 ring atoms, more preferably 1 to 6 carbon atoms or an aryl group having 6 to 12 ring carbon atoms. The details of each group are as described above.

Invention compounds can be easily produced by those skilled in the art by referring to the following synthesis examples and known synthesis methods.

Specific examples of the compounds of the invention are shown below, but are not limited to the following exemplary compounds.
In the following specific examples, D represents a deuterium atom.

Exemplary compounds of formula (1)
(1) Fla1-1

(2) Fla1-2

(3) Fla1-3

(2) Fla1-2

(4) Fla1-4

(3) Fla1-3

(5) Fla1-5

(6) Fla1-6

(4) Fla1-4

(7) Fla1-7

(8) Fla1-8

(9) Fla1-9

(10) Fla1-10

(11) Fla1-11a

(12) Fla1-11b

(13) Fla1-11c

(14) Fla1-12

(15) Fla1-13

(6) Fla1-6

Exemplary compounds of formula (2)
(16) Fla2-1

(17) Fla2-2

(7) Fla1-7

(18) Fla2-3

(19) Fla2-4

(20) Fla2-5

(21) Fla2-6a

(22) Fla2-6b

(23) Fla2-7

Organic EL Device Material The organic EL device material of the present invention contains the inventive compound. The content of the invention compound in the organic EL device material is 1% by mass or more (including 100%), preferably 10% by mass or more (including 100%), and 50% by mass or more (including 100% more preferably 80% by mass or more (including 100%), and particularly preferably 90% by mass or more (including 100%). The organic EL device material of the present invention is useful for producing organic EL devices.

Organic EL Device The organic EL device of the present invention comprises an anode, a cathode, and an organic layer disposed between the anode and the cathode. The organic layers comprise a light-emitting layer, and at least one layer of the organic layers comprises an invention compound.
Examples of the organic layer containing the compound of the invention include a hole-transporting zone provided between the anode and the light-emitting layer (hole-injection layer, hole-transporting layer, electron-blocking layer, exciton-blocking layer, etc.), light-emitting layer . The inventive compound is preferably a material for the hole-transporting zone or light-emitting layer of a fluorescent or phosphorescent EL device, more preferably a material for the hole-transporting zone, even more preferably a hole-injecting layer, a hole-transporting layer, an electron-blocking layer, or an excitation layer. It is used as a material for electron-blocking layers, particularly preferably as a material for hole-injecting layers or hole-transporting layers.

The organic EL device of the present invention may be a fluorescent or phosphorescent monochromatic light emitting device, a fluorescent/phosphorescent hybrid white light emitting device, or a simple type having a single light emitting unit. Alternatively, it may be of a tandem type having a plurality of light-emitting units, and among others, it is preferably a fluorescent light-emitting device. Here, the term “light-emitting unit” refers to a minimum unit that includes organic layers, at least one layer of which is a light-emitting layer, and emits light by recombination of injected holes and electrons.

For example, as a representative device configuration of the simple type organic EL device, the following device configuration can be mentioned.
(1) Anode/light-emitting unit/cathode The light-emitting unit may be of a multilayer type having a plurality of phosphorescent-emitting layers or fluorescent-emitting layers. A space layer may be provided for the purpose of preventing the excitons from diffusing into the fluorescence-emitting layer. A typical layer structure of a simple light-emitting unit is shown below. Layers in brackets are optional.
(a) (Hole Injection Layer/) Hole Transport Layer/Fluorescent Emitting Layer/Electron Transport Layer (/Electron Injection Layer)
(b) (Hole Injection Layer/) Hole Transport Layer/First Fluorescent Layer/Second Fluorescent Layer/Electron Transport Layer (/Electron Injection Layer)
(c) (Hole injection layer/) Hole transport layer/Phosphorescent layer/Space layer/Fluorescent layer/Electron transport layer (/Electron injection layer)
(d) (hole injection layer/) hole transport layer/first phosphorescence-emitting layer/second phosphorescence-emitting layer/space layer/fluorescence-emitting layer/electron transport layer (/electron injection layer)
(e) (Hole Injection Layer/) Hole Transport Layer/Phosphorescent Layer/Space Layer/First Fluorescent Layer/Second Fluorescent Layer/Electron Transport Layer (/Electron Injection Layer)
(f) (Hole Injection Layer/) Hole Transport Layer/Electron Blocking Layer/Fluorescent Emitting Layer/Electron Transport Layer (/Electron Injection Layer)
(g) (Hole Injection Layer/) Hole Transport Layer/Exciton Blocking Layer/Fluorescent Emitting Layer/Electron Transport Layer (/Electron Injection Layer)
(h) (Hole Injection Layer/) First Hole Transport Layer/Second Hole Transport Layer/Fluorescent Emitting Layer/Electron Transport Layer (/Electron Injection Layer)
(i) (Hole Injection Layer/) First Hole Transport Layer/Second Hole Transport Layer/Fluorescence Emitting Layer/First Electron Transport Layer/Second Electron Transport Layer (/Electron Injection Layer)
(j) (Hole Injection Layer/) Hole Transport Layer/Fluorescent Emitting Layer/Hole Blocking Layer/Electron Transport Layer (/Electron Injection Layer)
(k) (Hole Injection Layer/) Hole Transport Layer/Fluorescence Emitting Layer/Exciton Blocking Layer/Electron Transport Layer (/Electron Injection Layer)
(l) (Hole Injection Layer/) First Hole Transport Layer/Second Hole Transport Layer/First Fluorescent Layer/Second Fluorescent Layer/First Electron Transport Layer/Second Electron Transport Layer (/Electron injection layer)
(m) (Hole Injection Layer/) First Hole Transport Layer/Second Hole Transport Layer/Third Hole Transport Layer/First Fluorescent Layer/Second Fluorescent Layer/First Electron Transport Layer/Third Hole Transport Layer 2 electron transport layer (/electron injection layer)
(n) (hole-injection layer/) first hole-transport layer/second hole-transport layer/third hole-transport layer/fluorescence-emitting layer/first electron-transport layer/second electron-transport layer (/electron injection layer)

Each of the phosphorescent or fluorescent light-emitting layers may exhibit different emission colors. Specifically, in the light-emitting unit (f), (hole injection layer/) hole transport layer/first phosphorescent-emitting layer (red emission)/second phosphorescent-emitting layer (green emission)/space layer/fluorescence emission Examples thereof include a layer structure such as layer (blue light emitting)/electron transport layer.
An electron blocking layer may be appropriately provided between each light-emitting layer and the hole transport layer or space layer. A hole-blocking layer may be appropriately provided between each light-emitting layer and the electron-transporting layer. By providing an electron-blocking layer or a hole-blocking layer, electrons or holes can be confined in the light-emitting layer, the probability of charge recombination in the light-emitting layer can be increased, and the light-emitting efficiency can be improved.

As a representative device configuration of the tandem-type organic EL device, the following device configuration can be mentioned.
(2) Anode/first light-emitting unit/intermediate layer/second light-emitting unit/cathode Here, the first light-emitting unit and the second light-emitting unit can be selected independently from the light-emitting units described above, for example. .
The intermediate layer is also generally called an intermediate electrode, an intermediate conductive layer, a charge generation layer, an electron extraction layer, a connection layer, or an intermediate insulating layer, and provides electrons to the first light-emitting unit and holes to the second light-emitting unit. Known material configurations can be used to supply.

FIG. 1 is a schematic diagram showing an example of the configuration of the organic EL element of the present invention. The organic EL element 1 has a substrate 2 , an anode 3 , a cathode 4 , and a light emitting unit 10 arranged between the anode 3 and the cathode 4 . The light-emitting unit 10 has a light-emitting layer 5 . A hole transport zone 6 (a hole injection layer, a hole transport layer, etc.) is provided between the light emitting layer 5 and the anode 3, and an electron transport zone 7 (an electron injection layer, an electron transport layer, etc.) is provided between the light emitting layer 5 and the cathode 4. etc.). Further, an electron blocking layer (not shown) and a hole blocking layer (not shown) may be provided on the anode 3 side of the light emitting layer 5 and the cathode 4 side of the light emitting layer 5, respectively. As a result, electrons and holes can be confined in the light-emitting layer 5, and the exciton generation efficiency in the light-emitting layer 5 can be further increased.

FIG. 2 is a schematic diagram showing another configuration of the organic EL element of the present invention. The organic EL element 11 has a substrate 2 , an anode 3 , a cathode 4 , and a light emitting unit 20 arranged between the anode 3 and the cathode 4 . The light-emitting unit 20 has a light-emitting layer 5 . A hole-transporting zone located between the anode 3 and the light-emitting layer 5 is formed from a hole-injecting layer 6a, a first hole-transporting layer 6b and a second hole-transporting layer 6c. Also, the electron-transporting zone disposed between the light-emitting layer 5 and the cathode 4 is formed from a first electron-transporting layer 7a and a second electron-transporting layer 7b.

FIG. 3 is a schematic diagram showing another configuration of the organic EL element of the present invention. The organic EL element 12 has a substrate 2 , an anode 3 , a cathode 4 , and a light emitting unit 30 arranged between the anode 3 and the cathode 4 . The light-emitting unit 30 has a light-emitting layer 5 . A hole-transporting zone located between the anode 3 and the light-emitting layer 5 is formed from a hole-injecting layer 6a, a first hole-transporting layer 6b, a second hole-transporting layer 6c and a third hole-transporting layer 6d. It is Also, the electron-transporting zone disposed between the light-emitting layer 5 and the cathode 4 is formed from a first electron-transporting layer 7a and a second electron-transporting layer 7b.

In the present invention, a host combined with a fluorescent dopant material (fluorescent light-emitting material) is called a fluorescent host, and a host combined with a phosphorescent dopant material is called a phosphorescent host. Fluorescent hosts and phosphorescent hosts are not distinguished only by molecular structure. That is, the phosphorescent host means a material that contains a phosphorescent dopant and forms a phosphorescent light-emitting layer, and does not mean that it cannot be used as a material for forming a fluorescent light-emitting layer. The same is true for fluorescent hosts.

Substrate The substrate is used as a support for the organic EL device. As the substrate, for example, a plate of glass, quartz, plastic, or the like can be used. Alternatively, a flexible substrate may be used. Examples of flexible substrates include plastic substrates made of polycarbonate, polyarylate, polyethersulfone, polypropylene, polyester, polyvinyl fluoride, and polyvinyl chloride. Inorganic deposition films can also be used.

Anode For the anode formed on the substrate, it is preferable to use a metal, an alloy, an electrically conductive compound, a mixture thereof, or the like having a large work function (specifically, 4.0 eV or more). Specifically, for example, indium oxide-tin oxide (ITO: Indium Tin Oxide), indium oxide-tin oxide containing silicon or silicon oxide, indium oxide-zinc oxide, indium oxide containing tungsten oxide and zinc oxide, Graphene etc. are mentioned. In addition, gold (Au), platinum (Pt), nickel (Ni), tungsten (W), chromium (Cr), molybdenum (Mo), iron (Fe), cobalt (Co), copper (Cu), palladium ( Pd), titanium (Ti), or nitrides of the above metals (for example, titanium nitride).

These materials are usually deposited by a sputtering method. For example, indium oxide-zinc oxide is a target in which 1 to 10 wt% of zinc oxide is added to indium oxide, and indium oxide containing tungsten oxide and zinc oxide is a target in which 0.5 to 5 wt% of tungsten oxide is added to indium oxide. %, and 0.1 to 1 wt % of zinc oxide, it can be formed by a sputtering method. In addition, it may be produced by a vacuum vapor deposition method, a coating method, an inkjet method, a spin coating method, or the like.

Hole-Transporting Zone As mentioned above, the organic layer may contain a hole-transporting zone between the anode and the light-emitting layer. The hole-transporting zone is composed of a hole-injecting layer, a hole-transporting layer, an electron-blocking layer, and the like. It is preferred that the hole-transporting zone comprises an invention compound. At least one of these layers constituting the hole-transporting layer preferably contains the invention compound, and particularly preferably the hole-transporting layer contains the invention compound.

The hole injection layer formed in contact with the anode is formed using a material that facilitates hole injection regardless of the work function of the anode. , alloys, electrically conductive compounds, and mixtures thereof, elements belonging to

Groups

1 and 2 of the Periodic Table of the Elements) can be used.
Elements belonging to

group

1 or 2 of the periodic table, which are materials with a small work function, that is, alkali metals such as lithium (Li) and cesium (Cs), magnesium (Mg), calcium (Ca), and strontium Alkaline earth metals such as (Sr), alloys containing these (e.g., MgAg, AlLi), rare earth metals such as europium (Eu) and ytterbium (Yb), and alloys containing these can also be used. In addition, when forming an anode using an alkali metal, an alkaline-earth metal, and the alloy containing these, a vacuum deposition method and a sputtering method can be used. Furthermore, when silver paste or the like is used, a coating method, an inkjet method, or the like can be used.

Hole-Injection Layer The hole-injection layer is a layer containing a material with high hole-injection properties (hole-injection material), and is located between the anode and the light-emitting layer or, if present, with the hole-transport layer. formed between the anodes.

Hole-injecting materials other than invention compounds include molybdenum oxide, titanium oxide, vanadium oxide, rhenium oxide, ruthenium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, and silver oxide. material, tungsten oxide, manganese oxide, or the like can be used.

4,4′,4″-tris(N,N-diphenylamino)triphenylamine (abbreviation: TDATA), 4,4′,4″-tris[N-(3- methylphenyl)-N-phenylamino]triphenylamine (abbreviation: MTDATA), 4,4′-bis[N-(4-diphenylaminophenyl)-N-phenylamino]biphenyl (abbreviation: DPAB), 4,4 '-bis(N-{4-[N'-(3-methylphenyl)-N'-phenylamino]phenyl}-N-phenylamino)biphenyl (abbreviation: DNTPD), 1,3,5-tris[N -(4-diphenylaminophenyl)-N-phenylamino]benzene (abbreviation: DPA3B), 3-[N-(9-phenylcarbazol-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviation: PCzPCA1), 3,6-bis[N-(9-phenylcarbazol-3-yl)-N-phenylamino]-9-phenylcarbazole (abbreviation: PCzPCA2), 3-[N-(1-naphthyl)-N Aromatic amine compounds such as -(9-phenylcarbazol-3-yl)amino]-9-phenylcarbazole (abbreviation: PCzPCN1) can also be used as hole injection layer materials.

Polymer compounds (oligomers, dendrimers, polymers, etc.) can also be used. For example, poly(N-vinylcarbazole) (abbreviation: PVK), poly(4-vinyltriphenylamine) (abbreviation: PVTPA), poly[N-(4-{N'-[4-(4-diphenylamino) phenyl]phenyl-N'-phenylamino}phenyl)methacrylamide] (abbreviation: PTPDMA), poly[N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)benzidine] (abbreviation: polymer compounds such as Poly-TPD). In addition, polymer compounds added with acids such as poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonic acid) (PEDOT/PSS) and polyaniline/poly(styrenesulfonic acid) (PAni/PSS) are used. can also

Furthermore, it is also preferable to use an acceptor material such as a hexaazatriphenylene (HAT) compound represented by the following formula (K).

(In the above formula, R ²²¹ to R ²²⁶ are each independently a cyano group, —CONH ₂ , a carboxyl group, or —COOR ²²⁷ (R ²²⁷ is an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 3 to 20 carbon atoms). In addition, adjacent two selected from R ²²¹ and R ²²² , R ²²³ and R ²²⁴ , and R ²²⁵ and R ²²⁶ are bonded to each other to form a group represented by —CO—O—CO— may form.)
Examples of R ²²⁷ include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, t-butyl group, cyclopentyl group, cyclohexyl group and the like.

Hole-transporting layer The hole-transporting layer is a layer containing a material with high hole-transporting properties (hole-transporting material), and is located between the anode and the light-emitting layer or, if present, with the hole-injecting layer. It is formed between the light emitting layers. Invention compounds may be used in the hole-transporting layer alone or in combination with the following compounds.

The hole transport layer may have a single layer structure or a multilayer structure including two or more layers. For example, the hole transport layer may have a two-layer structure including a first hole transport layer (anode side) and a second hole transport layer (cathode side). That is, the hole-transporting zone may include a first hole-transporting layer on the anode side and a second hole-transporting layer on the cathode side. Also, the hole transport layer may have a three-layer structure including a first hole transport layer, a second hole transport layer and a third hole transport layer in order from the anode side. That is, the third hole-transporting layer may be arranged between the second hole-transporting layer and the light-emitting layer.
In one aspect of the present invention, the hole-transporting layer having the single-layer structure is preferably adjacent to the light-emitting layer, and the hole-transporting layer closest to the cathode in the multilayer structure, for example, the two-layer structure It is preferable that the second hole-transporting layer of (1) and the third hole-transporting layer of the three-layer structure are adjacent to the light-emitting layer. In another aspect of the present invention, between the hole-transporting layer and the light-emitting layer in the single-layer structure, or between the hole-transporting layer closest to the light-emitting layer in the multilayer structure and the light-emitting layer, an electron A blocking layer or the like may be interposed.
When the hole transport layer has a two-layer structure, at least one of the first hole transport layer and the second hole transport layer contains the invention compound. That is, the invention compound is contained in only the first hole-transporting layer, only in the second hole-transporting layer, or in both the first hole-transporting layer and the second hole-transporting layer. In one aspect of the present invention, the compound of the invention is preferably contained in the second hole transport layer. That is, it is preferable that the invention compound is contained only in the second hole transport layer, or that the invention compound is contained in the first hole transport layer and the second hole transport layer.
When the hole-transporting layer has a three-layer structure, at least one of the first to third hole-transporting layers contains the inventive compound. That is, the compound of the present invention contains only one layer selected from the first to third hole transport layers (only the first hole transport layer, only the second hole transport layer, or only the third hole transport layer), Only two layers selected from the third hole transport layer (only the first hole transport layer and the second hole transport layer, only the first hole transport layer and the third hole transport layer, or the second hole transport layer and the third hole-transporting layer), or in all of the first to third hole-transporting layers.
In one aspect of the present invention, the compound of the invention is preferably contained in the second hole-transporting layer having a three-layer structure. That is, it is preferable that the invention compound is contained only in the second hole transport layer, or that the invention compound is contained in the second hole transport layer and one or both of the first hole transport layer and the third hole transport layer. .
In another aspect of the invention, invention compounds are preferably included in the third hole transport layer. That is, it is preferable that the invention compound is contained only in the third hole transport layer, or that the invention compound is contained in the third hole transport layer and one or both of the first hole transport layer and the second hole transport layer. .

In one aspect of the present invention, the compound of the invention contained in each hole transport layer is preferably a light hydrogen compound from the viewpoint of production cost. The aforementioned light hydrogen compound means an invention compound in which all hydrogen atoms in the invention compound are hydrogen atoms.
Accordingly, in the present invention, one or both of the first hole transport layer and the second hole transport layer (in the case of a two-layer structure), and at least one of the first to third hole transport layers substantially contain hydrogen It includes an organic EL device containing an invention compound consisting only of a body. The term "invention compound consisting essentially of a light hydrogen body" means that the content of the light hydrogen body in the total amount of the invention compounds is 90 mol% or more, preferably 95 mol% or more, more preferably 99 mol% or more (each including 100%).

As hole transport layer materials other than invention compounds, for example, aromatic amine compounds, carbazole derivatives, anthracene derivatives and the like can be used.
Examples of aromatic amine compounds include 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (abbreviation: NPB) and N,N'-bis(3-methylphenyl)-N , N′-diphenyl-[1,1′-biphenyl]-4,4′-diamine (abbreviation: TPD), 4-phenyl-4′-(9-phenylfluoren-9-yl)triphenylamine (abbreviation: BAFLP), 4,4′-bis[N-(9,9-dimethylfluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: DFLDPBi), 4,4′,4″-tris(N,N -diphenylamino)triphenylamine (abbreviation: TDATA), 4,4′,4″-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (abbreviation: MTDATA), and 4, 4′-bis[N-(spiro-9,9′-bifluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: BSPB). The compound has a hole mobility of 10 ⁻⁶ cm ² /Vs or higher.

Examples of carbazole derivatives include 4,4′-di(9-carbazolyl)biphenyl (abbreviation: CBP), 9-[4-(9-carbazolyl)phenyl]-10-phenylanthracene (abbreviation: CzPA), and 9-phenyl-3-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (abbreviation: PCzPA).
Examples of anthracene derivatives include 2-t-butyl-9,10-di(2-naphthyl)anthracene (abbreviation: t-BuDNA), 9,10-di(2-naphthyl)anthracene (abbreviation: DNA), and , 9,10-diphenylanthracene (abbreviation: DAnth).
Polymer compounds such as poly(N-vinylcarbazole) (abbreviation: PVK) and poly(4-vinyltriphenylamine) (abbreviation: PVTPA) can also be used.
However, a compound other than the above may be used as long as the compound has higher hole-transporting property than electron-transporting property.

In the organic EL device having a two-layered hole-transporting layer of the present invention, the first hole-transporting layer contains one or more compounds represented by the following formula (11) or (12): is preferred.
In the organic EL device having a three-layer hole-transport layer of the present invention, one or both of the first hole-transport layer and the second hole-transport layer are represented by the following formula (11) or (12). It preferably contains one or more compounds.
In the organic EL device having an n-layer structure (n is an integer of 4 or more) of the hole-transporting layer of the present invention, at least one of the first hole-transporting layer to the (n−1)-th hole-transporting layer has the following formula: It preferably contains one or more compounds represented by (11) or formula (12).

[In the above formulas (11) and (12),
L ^A1 , L ^B1 , L ^C1 , L ^A2 , L ^B2 , L ^C2 and L ^D2 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted is a divalent heterocyclic group having 5 to 50 ring-forming atoms,
k is 1, 2, 3 or 4;
when k is 1, L ^E2 is a substituted or unsubstituted arylene group having 6 to 50 ring-forming carbon atoms or a substituted or unsubstituted divalent heterocyclic group having 5 to 50 ring-forming atoms;
when k is 2, 3 or 4, 2, 3 or 4 L ^E2 are the same or different from each other;
When k is 2, 3 or 4, a plurality of L ^E2 are bonded to each other to form a substituted or unsubstituted monocyclic ring, bonded to each other to form a substituted or unsubstituted condensed ring, or do not combine
L ^E2 that does not form a single ring and does not form a condensed ring is a substituted or unsubstituted arylene group having 6 to 50 ring-forming carbon atoms, or a substituted or unsubstituted 2 having 5 to 50 ring-forming atoms is a valent heterocyclic group,
A ¹ , B ¹ , C ¹ , A ² , B ² , C ² and D ² are each independently a substituted or unsubstituted aryl group having 6 to 50 ring-forming carbon atoms, a substituted or unsubstituted ring-forming a heterocyclic group having 5 to 50 atoms, or -Si(R' ₉₀₁ ) (R' ₉₀₂ ) (R' ₉₀₃ );
R' ₉₀₁ , R' ₉₀₂ and R' ₉₀₃ are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms,
When multiple R' ₉₀₁ are present, the multiple R' ₉₀₁ are the same or different from each other,
When there are multiple R' ₉₀₂ , the multiple R' ₉₀₂ are the same or different from each other,
When multiple R' ₉₀₃ are present, the multiple R' ₉₀₃ are the same or different from each other. ]

In formulas (11) and (12), A1, B1, C1, A2, B2, C2, and D2 are preferably each independently a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenyl group, substituted or unsubstituted terphenyl group, substituted or unsubstituted naphthyl group, substituted or unsubstituted fluorenyl group, substituted or unsubstituted dibenzofuranyl group, substituted or unsubstituted dibenzothiophenyl group, and substituted or unsubstituted selected from carbazolyl groups;
More preferably, at least one of A1, B1 and C1 in formula (11) and at least one of A2, B2, C2 and D2 in formula (12) are substituted or unsubstituted biphenyl substituted or unsubstituted terphenyl group, substituted or unsubstituted naphthyl group, substituted or unsubstituted fluorenyl group, substituted or unsubstituted dibenzofuranyl group, or substituted or unsubstituted dibenzothiophenyl group, substituted or unsubstituted It is a substituted carbazolyl group.

The fluorenyl group that A1, B1, C1, A2, B2, C2, and D2 can take may have a substituent at the 9-position, for example, a 9,9-dimethylfluorenyl group, a 9,9- It may be a diphenylfluorenyl group. Moreover, the substituents at the 9-position may form a ring together, for example, the substituents at the 9-position may form a fluorene skeleton or a xanthene skeleton.

L ^A1 , L ^B1 , L ^C1 , L ^A2 , L ^B2 , L ^C2 and L ^D2 are preferably each independently a single bond or a substituted or unsubstituted arylene group having 6 to 12 ring-forming carbon atoms.

Specific examples of the compounds represented by formulas (11) and (12) include the following compounds.

Dopant Material of Light-Emitting Layer The light-emitting layer is a layer containing a highly luminescent material (dopant material), and various materials can be used. For example, a fluorescent light-emitting material or a phosphorescent light-emitting material can be used as the dopant material. A fluorescent light-emitting material is a compound that emits light from a singlet excited state, and a phosphorescent light-emitting material is a compound that emits light from a triplet excited state.
In one aspect of the invention, the emissive layer is a single layer.
Also, in another aspect of the invention, the light-emitting layer includes a first light-emitting layer and a second light-emitting layer.

A pyrene derivative, a styrylamine derivative, a chrysene derivative, a fluoranthene derivative, a fluorene derivative, a diamine derivative, a triarylamine derivative, or the like can be used as a blue fluorescent light-emitting material that can be used in the light-emitting layer. Specifically, N,N′-bis[4-(9H-carbazol-9-yl)phenyl]-N,N′-diphenylstilbene-4,4′-diamine (abbreviation: YGA2S), 4-(9H -carbazol-9-yl)-4'-(10-phenyl-9-anthryl)triphenylamine (abbreviation: YGAPA), 4-(10-phenyl-9-anthryl)-4'-(9-phenyl-9H -carbazol-3-yl)triphenylamine (abbreviation: PCBAPA) and the like.

An aromatic amine derivative or the like can be used as a greenish fluorescent light-emitting material that can be used in the light-emitting layer. Specifically, N-(9,10-diphenyl-2-anthryl)-N,9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCAPA), N-[9,10-bis(1,1 '-biphenyl-2-yl)-2-anthryl]-N,9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCABPhA), N-(9,10-diphenyl-2-anthryl)-N,N ',N'-triphenyl-1,4-phenylenediamine (abbreviation: 2DPAPA), N-[9,10-bis(1,1'-biphenyl-2-yl)-2-anthryl]-N,N' , N′-triphenyl-1,4-phenylenediamine (abbreviation: 2DPABPhA), N-[9,10-bis(1,1′-biphenyl-2-yl)]-N-[4-(9H-carbazole -9-yl)phenyl]-N-phenylanthracen-2-amine (abbreviation: 2YGABPhA), N,N,9-triphenylanthracen-9-amine (abbreviation: DPhAPhA), and the like.

A tetracene derivative, a diamine derivative, or the like can be used as a red fluorescent light-emitting material that can be used in the light-emitting layer. Specifically, N,N,N',N'-tetrakis(4-methylphenyl)tetracene-5,11-diamine (abbreviation: p-mPhTD), 7,14-diphenyl-N,N,N', and N'-tetrakis(4-methylphenyl)acenaphtho[1,2-a]fluoranthene-3,10-diamine (abbreviation: p-mPhAFD).

In one aspect of the present invention, the light-emitting layer preferably contains a fluorescent light-emitting material (fluorescent dopant material).

Metal complexes such as iridium complexes, osmium complexes, and platinum complexes are used as blue phosphorescent materials that can be used in the light-emitting layer. Specifically, bis[2-(4′,6′-difluorophenyl)pyridinato-N,C2′]iridium(III) tetrakis(1-pyrazolyl)borate (abbreviation: FIr6), bis[2-(4′ ,6′-difluorophenyl)pyridinato-N,C2′]iridium (III) picolinate (abbreviation: FIrpic), bis[2-(3′,5′bistrifluoromethylphenyl)pyridinato-N,C2′]iridium (III ) picolinate (abbreviation: Ir(CF3ppy)2(pic)), bis[2-(4′,6′-difluorophenyl)pyridinato-N,C2′]iridium(III) acetylacetonate (abbreviation: FIracac), etc. mentioned.

An iridium complex or the like is used as a greenish phosphorescent material that can be used in the light-emitting layer. Tris (2-phenylpyridinato-N, C2') iridium (III) (abbreviation: Ir (ppy) 3), bis (2-phenylpyridinato-N, C2') iridium (III) acetylacetonate ( Abbreviations: Ir (ppy) 2 (acac)), bis (1,2-diphenyl-1H-benzimidazolato) iridium (III) acetylacetonate (abbreviation: Ir (pbi) 2 (acac)), bis (benzo[ h]quinolinato)iridium(III) acetylacetonate (abbreviation: Ir(bzq)2(acac)) and the like.

Metal complexes such as iridium complexes, platinum complexes, terbium complexes, and europium complexes are used as red phosphorescent materials that can be used in the light-emitting layer. Specifically, bis[2-(2′-benzo[4,5-α]thienyl)pyridinato-N,C3′]iridium(III) acetylacetonate (abbreviation: Ir(btp)2(acac)), Bis(1-phenylisoquinolinato-N,C2′)iridium(III) acetylacetonate (abbreviation: Ir(piq)2(acac)), (acetylacetonato)bis[2,3-bis(4-fluoro Phenyl)quinoxalinato]iridium (III) (abbreviation: Ir(Fdpq)2(acac)), 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrinplatinum (II) (abbreviation: : PtOEP) and other organometallic complexes.

In addition, tris (acetylacetonate) (monophenanthroline) terbium (III) (abbreviation: Tb (acac) 3 (Phen)), tris (1,3-diphenyl-1,3-propanedionato) (monophenanthroline) europium (III) (abbreviation: Eu (DBM) 3 (Phen)), tris[1-(2-thenoyl)-3,3,3-trifluoroacetonato] (monophenanthroline) europium (III) (abbreviation: Eu ( Rare-earth metal complexes such as TTA)3(Phen)) can be used as phosphorescent light-emitting materials because they emit light from rare-earth metal ions (electronic transitions between different multiplicities).

Host Material of Light-Emitting Layer The light-emitting layer may have a structure in which the above-described dopant material is dispersed in another material (host material). It is preferable to use a material whose lowest unoccupied molecular orbital level (LUMO level) is higher than that of the dopant material and whose highest occupied molecular orbital level (HOMO level) is lower.

Examples of host materials include (1) metal complexes such as aluminum complexes, beryllium complexes, and zinc complexes;
(2) heterocyclic compounds such as oxadiazole derivatives, benzimidazole derivatives, or phenanthroline derivatives;
(3) condensed aromatic compounds such as carbazole derivatives, anthracene derivatives, phenanthrene derivatives, pyrene derivatives, or chrysene derivatives;
(4) Aromatic amine compounds such as triarylamine derivatives or condensed polycyclic aromatic amine derivatives are used.

For example, tris(8-quinolinolato)aluminum (III) (abbreviation: Alq), tris(4-methyl-8-quinolinolato)aluminum (III) (abbreviation: Almq3), bis(10-hydroxybenzo[h]quinolinato)beryllium (II) (abbreviation: BeBq2), bis(2-methyl-8-quinolinolato)(4-phenylphenolato)aluminum (III) (abbreviation: BAlq), bis(8-quinolinolato)zinc (II) (abbreviation: Znq) ), bis[2-(2-benzoxazolyl)phenolato]zinc(II) (abbreviation: ZnPBO), bis[2-(2-benzothiazolyl)phenolato]zinc(II) (abbreviation: ZnBTZ), and other metal complexes ;
2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis[5-(p-tert-butylphenyl) -1,3,4-oxadiazol-2-yl]benzene (abbreviation: OXD-7), 3-(4-biphenylyl)-4-phenyl-5-(4-tert-butylphenyl)-1,2 ,4-triazole (abbreviation: TAZ), 2,2′,2″-(1,3,5-benzenetriyl)tris(1-phenyl-1H-benzimidazole) (abbreviation: TPBI), bathophenanthroline ( Heterocyclic compounds such as abbreviation: BPhen) and bathocuproine (abbreviation: BCP);
9-[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazole (abbreviation: CzPA), 3,6-diphenyl-9-[4-(10-phenyl-9-anthryl)phenyl]-9H -carbazole (abbreviation: DPCzPA), 9,10-bis(3,5-diphenylphenyl)anthracene (abbreviation: DPPA), 9,10-di(2-naphthyl)anthracene (abbreviation: DNA), 2-tert-butyl -9,10-di(2-naphthyl)anthracene (abbreviation: t-BuDNA), 9,9′-bianthryl (abbreviation: BANT), 9,9′-(stilbene-3,3′-diyl)diphenanthrene ( DPNS), 9,9′-(stilbene-4,4′-diyl)diphenanthrene (abbreviation: DPNS2), 3,3′,3″-(benzene-1,3,5-triyl)tripylene ( abbreviation: TPB3), 9,10-diphenylanthracene (abbreviation: DPAnth), condensed aromatic compounds such as 6,12-dimethoxy-5,11-diphenylchrysene; and N,N-diphenyl-9-[4-(10 -Phenyl-9-anthryl)phenyl]-9H-carbazol-3-amine (abbreviation: CzA1PA), 4-(10-phenyl-9-anthryl)triphenylamine (abbreviation: DPhPA), N,9-diphenyl-N -[4-(10-phenyl-9-anthryl)phenyl]-9H-carbazol-3-amine (abbreviation: PCAPA), N,9-diphenyl-N-{4-[4-(10-phenyl-9- anthryl)phenyl]phenyl}-9H-carbazol-3-amine (abbreviation: PCAPBA), N-(9,10-diphenyl-2-anthryl)-N,9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCAPA), 4,4′-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (abbreviation: NPB or α-NPD), N,N′-bis(3-methylphenyl)-N,N '-Diphenyl-[1,1'-biphenyl]-4,4'-diamine (abbreviation: TPD), 4,4'-bis[N-(9,9-dimethylfluoren-2-yl)-N-phenyl Aromatic amine compounds such as amino]biphenyl (abbreviation: DFLDPBi), 4,4'-bis[N-(spiro-9,9'-bifluoren-2-yl)-N-phenylamino]biphenyl (abbreviation: BSPB) can be used. A plurality of host materials may be used.

Especially in the case of a blue fluorescent device, it is preferable to use the following anthracene compound as the host material.

In one aspect of the organic EL device according to the present invention, when the light-emitting layer includes a first light-emitting layer and a second light-emitting layer, at least one of the components constituting the first light-emitting layer includes the second light-emitting layer. It is different from the constituent ingredients. For example, the dopant material contained in the first light-emitting layer is different from the dopant material contained in the second light-emitting layer, and the host material contained in the first light-emitting layer is different from the host material contained in the second light-emitting layer. Different aspects are included.

In the organic EL device of the present invention, the light-emitting layer may contain a light-emitting compound that emits fluorescence with a main peak wavelength of 500 nm or less (hereinafter sometimes simply referred to as "fluorescence-emitting compound").

A method for measuring the main peak wavelength of a compound is as follows. A 5 μmol/L toluene solution of the compound to be measured is prepared and placed in a quartz cell, and the emission spectrum (vertical axis: emission intensity, horizontal axis: wavelength) of this sample is measured at room temperature (300K). The emission spectrum can be measured with a spectrofluorophotometer (device name: F-7000) manufactured by Hitachi High-Tech Science Co., Ltd. Note that the emission spectrum measuring device is not limited to the device used here.
In the emission spectrum, the peak wavelength of the emission spectrum at which the emission intensity is maximum is defined as the main peak wavelength. In this specification, the main peak wavelength may be referred to as fluorescence emission main peak wavelength (FL-peak).

The fluorescent compound may be the dopant material or the host material.

When the emitting layer is a single layer, only one of the dopant material and the host material may be the fluorescent compound, or both of them may be the fluorescent compound.
When the light-emitting layer includes a first light-emitting layer (anode side) and a second light-emitting layer (cathode side), only one of the first light-emitting layer and the second light-emitting layer includes the fluorescent compound. Alternatively, both light-emitting layers may contain the fluorescent compound. When the first emitting layer contains the fluorescent compound, only one of the dopant material and the host material contained in the first emitting layer may be the fluorescent compound, or both may be the fluorescent compound. There may be. When the second light-emitting layer contains the fluorescent compound, only one of the dopant material and the host material contained in the second light-emitting layer may be the fluorescent compound, or both may be the fluorescent light-emitting compound. It may be a chemical compound.

Electron-transporting layer The electron-transporting layer is a layer containing a material with high electron-transporting properties (electron-transporting material), and is formed between the light-emitting layer and the cathode, or, if present, between the electron-injecting layer and the light-emitting layer. be.
The electron transport layer may have a single layer structure or a multilayer structure including two or more layers. For example, the electron transport layer may have a two-layer structure including a first electron transport layer (anode side) and a second electron transport layer (cathode side). In one aspect of the present invention, the single-layer electron-transporting layer is preferably adjacent to the light-emitting layer, and the electron-transporting layer closest to the anode in the multilayer structure, for example, the second electron-transporting layer of the two-layer structure. 1 The electron-transporting layer is preferably adjacent to the light-emitting layer. In another aspect of the present invention, between the electron-transporting layer and the light-emitting layer in the single-layer structure, or between the electron-transporting layer closest to the light-emitting layer in the multilayer structure and the light-emitting layer, a hole-blocking layer as described below is provided. A layer or the like may be interposed.

For the electron transport layer, for example,
(1) metal complexes such as aluminum complexes, beryllium complexes and zinc complexes;
(2) heteroaromatic compounds such as imidazole derivatives, benzimidazole derivatives, azine derivatives, carbazole derivatives, phenanthroline derivatives;
(3) Polymer compounds can be used.

Examples of metal complexes include tris(8-quinolinolato)aluminum (III) (abbreviation: Alq), tris(4-methyl-8-quinolinolato)aluminum (abbreviation: Almq3), bis(10-hydroxybenzo[h]quinolinato ) beryllium (abbreviation: BeBq ₂ ), bis(2-methyl-8-quinolinolato)(4-phenylphenolato)aluminum (III) (abbreviation: BAlq), bis(8-quinolinolato)zinc (II) (abbreviation: Znq ), bis[2-(2-benzoxazolyl)phenolato]zinc(II) (abbreviation: ZnPBO), and bis[2-(2-benzothiazolyl)phenolato]zinc(II) (abbreviation: ZnBTZ).

Examples of heteroaromatic compounds include 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis[5 -(ptert-butylphenyl)-1,3,4-oxadiazol-2-yl]benzene (abbreviation: OXD-7), 3-(4-tert-butylphenyl)-4-phenyl-5-(4 -biphenylyl)-1,2,4-triazole (abbreviation: TAZ), 3-(4-tert-butylphenyl)-4-(4-ethylphenyl)-5-(4-biphenylyl)-1,2,4 -triazole (abbreviation: p-EtTAZ), bathophenanthroline (abbreviation: BPhen), bathocuproine (abbreviation: BCP), 4,4'-bis(5-methylbenzoxazol-2-yl)stilbene (abbreviation: BzOs) be done.

Examples of polymer compounds include poly[(9,9-dihexylfluorene-2,7-diyl)-co-(pyridine-3,5-diyl)] (abbreviation: PF-Py), poly[(9, 9-dioctylfluorene-2,7-diyl)-co-(2,2′-bipyridine-6,6′-diyl)] (abbreviation: PF-BPy).

The above material is a material having an electron mobility of 10 ⁻⁶ cm ² /Vs or more. Materials other than those described above may be used for the electron transport layer as long as the material has higher electron transport properties than hole transport properties.

Electron Injection Layer The electron injection layer is a layer containing a material with high electron injection properties. The electron injection layer contains alkali metals such as lithium (Li) and cesium (Cs), alkaline earth metals such as magnesium (Mg), calcium (Ca) and strontium (Sr), europium (Eu) and ytterbium (Yb). Rare earth metals such as and compounds containing these metals can be used. Examples of such compounds include alkali metal oxides, alkali metal halides, alkali metal-containing organic complexes, alkaline earth metal oxides, alkaline earth metal halides, alkaline earth metal-containing organic complexes, and rare earth metal oxides. compounds, rare earth metal halides, and rare earth metal-containing organic complexes. Also, a plurality of these compounds can be mixed and used.
In addition, a material having an electron-transporting property containing an alkali metal, an alkaline earth metal, or a compound thereof, specifically, a material containing magnesium (Mg) in Alq may be used. In this case, electron injection from the cathode can be performed more efficiently.
Alternatively, a composite material obtained by mixing an organic compound and an electron donor (donor) may be used for the electron injection layer. Such a composite material has excellent electron injection and electron transport properties because the organic compound receives electrons from the electron donor. In this case, the organic compound is preferably a material that is excellent in transporting the received electrons. Specifically, for example, the material (metal complex, heteroaromatic compound, etc.) constituting the electron transport layer described above is used. be able to. As the electron donor, any material can be used as long as it exhibits an electron donating property with respect to the organic compound. Specifically, alkali metals, alkaline earth metals and rare earth metals are preferred, and examples include lithium, cesium, magnesium, calcium, erbium and ytterbium. Further, alkali metal oxides and alkaline earth metal oxides are preferred, and examples thereof include lithium oxide, calcium oxide and barium oxide. Lewis bases such as magnesium oxide can also be used. An organic compound such as tetrathiafulvalene (abbreviation: TTF) can also be used.

Cathode For the cathode, it is preferable to use a metal, an alloy, an electrically conductive compound, a mixture thereof, or the like having a small work function (specifically, 3.8 eV or less). Specific examples of such cathode materials include elements belonging to Group 1 or Group 2 of the periodic table, that is, alkali metals such as lithium (Li) and cesium (Cs), magnesium (Mg), calcium (Ca ), alkaline earth metals such as strontium (Sr), and alloys containing these (e.g., MgAg, AlLi), rare earth metals such as europium (Eu) and ytterbium (Yb), and alloys containing these.
In addition, when forming a cathode using an alkali metal, an alkaline-earth metal, and the alloy containing these, a vacuum deposition method and a sputtering method can be used. Moreover, when silver paste or the like is used, a coating method, an inkjet method, or the like can be used.
By providing an electron injection layer, a cathode is formed using various conductive materials such as Al, Ag, ITO, graphene, silicon, or indium oxide-tin oxide containing silicon oxide, regardless of the magnitude of the work function. can do. These conductive materials can be deposited using a sputtering method, an inkjet method, a spin coating method, or the like.

Insulating layer Since an electric field is applied to an ultra-thin organic EL element, pixel defects due to leaks and short circuits are likely to occur. In order to prevent this, an insulating layer made of an insulating thin film layer may be inserted between the pair of electrodes.
Examples of materials used for the insulating layer include aluminum oxide, lithium fluoride, lithium oxide, cesium fluoride, cesium oxide, magnesium oxide, magnesium fluoride, calcium oxide, calcium fluoride, aluminum nitride, titanium oxide, and silicon oxide. , germanium oxide, silicon nitride, boron nitride, molybdenum oxide, ruthenium oxide, vanadium oxide and the like. A mixture or laminate of these materials may also be used.

Space layer The space layer is, for example, when a fluorescent-emitting layer and a phosphorescent-emitting layer are laminated, for the purpose of preventing excitons generated in the phosphorescent-emitting layer from diffusing into the fluorescent-emitting layer or adjusting the carrier balance. It is a layer provided between the fluorescent-emitting layer and the phosphorescent-emitting layer. A space layer can also be provided between a plurality of phosphorescent-emitting layers.
Since the space layer is provided between the light-emitting layers, it is preferably made of a material having both electron-transporting properties and hole-transporting properties. Moreover, the triplet energy is preferably 2.6 eV or more in order to prevent diffusion of the triplet energy in the adjacent phosphorescent-emitting layer. Materials used for the space layer include those similar to those used for the above-described hole transport layer.

Blocking Layers Blocking layers such as electron blocking layers, hole blocking layers, exciton blocking layers, etc. may be provided adjacent to the light-emitting layer. The electron-blocking layer is a layer that prevents electrons from leaking from the light-emitting layer to the hole-transporting layer, and the hole-blocking layer is a layer that prevents holes from leaking from the light-emitting layer to the electron-transporting layer. The exciton-blocking layer has the function of preventing the excitons generated in the light-emitting layer from diffusing to surrounding layers and confining the excitons within the light-emitting layer.

Each layer of the organic EL element can be formed by a conventionally known vapor deposition method, coating method, or the like. For example, a vapor deposition method such as a vacuum vapor deposition method or a molecular beam vapor deposition method (MBE method), or a dipping method, a spin coating method, a casting method, a bar coating method, a roll coating method, or the like using a solution of a compound forming a layer. can be formed by a known method by the coating method of .

The film thickness of each layer is not particularly limited, but in general, if the film thickness is too thin, defects such as pinholes are likely to occur. 10 nm to 0.2 μm is more preferred.

In the organic EL device having a two-layer structure or three-layer structure hole transport layer of the present invention, the total thickness of the first hole transport layer and the second hole transport layer is preferably 30 nm or more and 150 nm. Below, more preferably, it is 40 nm or more and 130 nm or less.
In one aspect of the present invention, the thickness of the second hole-transporting layer having a two-layer structure or a three-layer structure is preferably 5 nm or more, more preferably 20 nm or more, still more preferably 25 nm or more, and particularly preferably 35 nm or more. and preferably 100 nm or less.
In one aspect of the present invention, the thickness of the hole-transporting layer adjacent to the light-emitting layer is preferably 5 nm or more, more preferably 20 nm or more, still more preferably 25 nm or more, and particularly preferably 30 nm or more, and It is preferably 100 nm or less.
In the organic EL device having a two-layer structure or three-layer structure of the hole transport layer of the present invention, the ratio of the thickness D2 of the second hole transport layer to the thickness D1 of the first hole transport layer is preferably 0.3<D2/D1<4.0, more preferably 0.5<D2/D1<3.5, still more preferably 0.75<D2/D1<3.0.

Preferred embodiments of the organic EL device of the present invention include, for example,
(1) An organic EL device having a two-layered hole-transporting layer The first embodiment in which the second hole-transporting layer contains the compound of the invention and the first hole-transporting layer does not contain the compound of the invention;
- a second embodiment in which both the first hole-transporting layer and the second hole-transporting layer comprise an invention compound;
- a third embodiment in which the first hole-transporting layer comprises an invention compound and the second hole-transporting layer does not comprise an invention compound;
(2) An organic EL device having three-layered hole-transporting layers - a fourth embodiment in which the first hole-transporting layer contains the compound of the invention and the second and third hole-transporting layers do not contain the compound of the invention;
- a fifth embodiment, wherein the second hole-transporting layer comprises an invention compound and the first and third hole-transporting layers do not comprise an invention compound;
- a sixth embodiment, wherein the third hole-transporting layer comprises an invention compound and the first and second hole-transporting layers do not comprise an invention compound;
- a seventh embodiment in which the first and second hole-transporting layers comprise an invention compound and the third hole-transporting layer does not comprise an invention compound;
- an eighth embodiment, wherein the first and third hole-transporting layers comprise an invention compound and the second hole-transporting layer does not comprise an invention compound;
- a tenth embodiment, wherein the second and third hole-transporting layers comprise an invention compound and the first hole-transporting layer does not comprise an invention compound;
a tenth embodiment in which all of the first to third hole transport layers contain the compound of the present invention;

Electronic Equipment The organic EL element can be used for display parts such as organic EL panel modules, display devices such as televisions, mobile phones, and personal computers, and electronic equipment such as light-emitting devices for lighting and vehicle lamps.

The present invention will be described in more detail below using examples, but the present invention is not limited to the following examples.

Invention compound used for manufacturing organic EL device (I) of Example 1

Comparative compound used in the production of the organic EL device (I) of Comparative Example 1

Other compounds used in the production of the organic EL device (I) of Example 1 and Comparative Example 1

Preparation Example 1 of Organic EL Device (I)
A 25 mm×75 mm×1.1 mm glass substrate with an ITO transparent electrode (anode) (manufactured by Geomatec Co., Ltd.) was ultrasonically cleaned in isopropyl alcohol for 5 minutes and then UV ozone cleaned for 30 minutes. The film thickness of ITO was set to 130 nm.
After washing, the glass substrate with the ITO transparent electrode was mounted on a substrate holder of a vacuum vapor deposition apparatus.
First, the compound HT-1 and the compound HA were co-deposited on the surface on which the transparent electrode was formed so as to cover the transparent electrode, thereby forming a hole injection layer having a thickness of 10 nm. The mass ratio of compound HT-1 to compound HA (HT-1:HA) was 97:3.
Next, compound HT-1 was deposited on the hole injection layer to form a first hole transport layer with a thickness of 35 nm.
Next, invention compound Inv-1 was deposited on the first hole transport layer to form a second hole transport layer having a thickness of 40 nm.
Next, compound HT-3 was vapor-deposited on the second hole-transporting layer to form a third hole-transporting layer with a thickness of 7.5 nm.
Next, the compound BH-1 (host material), the compound BH-2 (host material), and the compound BD-1 (dopant material) are co-deposited on the third hole-transporting layer to emit light with a film thickness of 20 nm. formed a layer. The mass ratio of compound BH-1, compound BH-2 and compound BD-1 (BH-1:BH-2:BD-1) was 60:40:2.
Next, the compound ET-1 was vapor-deposited on the light-emitting layer to form a first electron-transporting layer having a thickness of 3 nm.
Next, compound ET-2 and Liq were co-deposited on the first electron transport layer to form a second electron transport layer with a thickness of 30 nm. The mass ratio of compound ET-2 to Liq (ET-2:Liq) was 67:33.
Next, LiF was vapor-deposited on the second electron-transporting layer to form an electron-injecting electrode with a film thickness of 1 nm.
Then, metal Al was vapor-deposited on this electron-injecting electrode to form a metal cathode with a film thickness of 50 nm.
The layer structure of the organic EL device (I) thus obtained is shown below.

ITO (130)/HT-1:HA=97:3 (10)/HT-1 (35)/Inv-1 (40)/HT-3 (7.5)/BH-1:BH-2:BD-1 =60:40:2(20)/ET-1(3)/ET-2:Liq=67:33(30)/LiF(1)/Al(50)

In the above layer structure, numbers in parentheses are film thicknesses (nm), and ratios are mass ratios.

Comparative example 1
An organic EL device (I) was prepared in the same manner as in Example 1, except that the comparative compound Ref-1 was used instead of the inventive compound Inv-1.

Evaluation of Organic EL Device (I) (1) Measurement of External Quantum Efficiency (EQE) The obtained organic EL device (I) was driven at room temperature with a DC constant current at a current density of 10 mA/cm ² . Luminance was measured using a luminance meter (spectroradiometer CS-1000 manufactured by Minolta), and the external quantum efficiency (%) was determined from the results. Table 1 shows the results.
(2) 95% life (LT95)
The obtained organic EL device (I) was driven with a constant DC current at a current density of 50 mA/cm ² , and the time until the brightness decreased to 95% of the initial brightness was measured, and this was defined as 95% life (LT95). .

As is clear from the results in Table 1, the inventive compound Inv-1 has a higher external quantum efficiency than the comparative compound Ref-1 and provides a long-life organic EL device.

Inventive compounds used in the production of organic EL devices (II) of Examples 2 and 3

Comparative compound used in the production of the organic EL device (II) of Comparative Example 2

Other compounds used in the production of the organic EL device (II) of Examples 2 and 3 and Comparative Example 2

Preparation Example 2 of Organic EL Device (II)
A 25 mm×75 mm×1.1 mm glass substrate with an ITO transparent electrode (anode) (manufactured by Geomatec Co., Ltd.) was ultrasonically cleaned in isopropyl alcohol for 5 minutes and then UV ozone cleaned for 30 minutes. The film thickness of ITO was set to 130 nm.
After washing, the glass substrate with the ITO transparent electrode was mounted on a substrate holder of a vacuum vapor deposition apparatus.
First, compound HT-4 and compound HA were co-deposited on the surface on which the transparent electrode was formed so as to cover the transparent electrode, thereby forming a hole injection layer having a thickness of 10 nm. The mass ratio of compound HT-4 to compound HA (HT-4:HA) was 97:3.
Next, compound HT-4 was deposited on the hole injection layer to form a first hole transport layer with a thickness of 40 nm.
Next, invention compound Inv-4 was deposited on the first hole transport layer to form a second hole transport layer having a thickness of 40 nm.
Next, compound HT-6 was vapor-deposited on the second hole-transporting layer to form a third hole-transporting layer having a thickness of 5 nm.
Next, compound BH-3 (host material) and compound BD-2 (dopant material) were co-deposited on the third hole transport layer to form a light-emitting layer with a thickness of 20 nm. The mass ratio of compound BH-3 to compound BD-2 (BH-3:BD-2) was 99:1.
Next, the compound ET-3 was vapor-deposited on the light-emitting layer to form a first electron-transporting layer having a thickness of 5 nm.
Next, compound ET-4 and Liq were co-deposited on the first electron transport layer to form a second electron transport layer having a thickness of 25 nm. The mass ratio of compound ET-4 to Liq (ET-4:Liq) was 50:50.
Next, Yb was deposited on the second electron transport layer to form an electron injecting electrode with a thickness of 1 nm.
Then, metal Al was vapor-deposited on this electron-injecting electrode to form a metal cathode with a film thickness of 50 nm.
The external quantum efficiency (EQE) of the organic EL device (II) of Example 2 thus obtained was measured in the same manner as in Example 1. The results are shown in Table 2, and the layer structure of the organic EL device (II) of Example 2 is shown below.

ITO (130)/HT-4:HA=97:3 (10)/HT-4 (40)/Inv-4 (40)/HT-6 (5)/BH-3:BD-2=99:1 (20)/ET-3 (4)/ET-4:Liq=50:50 (25)/Yb (1)/Al (50)

In the above layer structure, numbers in parentheses are film thicknesses (nm), and ratios are mass ratios.

Example 3
An organic EL device (II) was produced in the same manner as in Example 2 except that the invention compound Inv-5 was used instead of the invention compound Inv-4, and the external quantum efficiency (EQE) was measured. Table 2 shows the results.

Comparative example 2
An organic EL device (II) was produced in the same manner as in Example 2 except that the comparative compound Ref-2 was used instead of the invention compound Inv-4, and the external quantum efficiency (EQE) was measured. Table 2 shows the results.

As is clear from the results in Table 2, invention compounds Inv-4 and 5 provide organic EL devices with higher external quantum efficiencies than comparative compound Ref-2.

Inventive compounds used in the production of organic EL devices (III) of Examples 4 and 5

Comparative compound used in the production of the organic EL device (III) of Comparative Example 2

Other compounds used in the production of the organic EL device (III) of Examples 4 and 5 and Comparative Example 3

Preparation Example 4 of Organic EL Device (III)
A 25 mm×75 mm×1.1 mm glass substrate with an ITO transparent electrode (anode) (manufactured by Geomatec Co., Ltd.) was ultrasonically cleaned in isopropyl alcohol for 5 minutes and then UV ozone cleaned for 30 minutes. The film thickness of ITO was set to 130 nm.
After washing, the glass substrate with the ITO transparent electrode was mounted on a substrate holder of a vacuum vapor deposition apparatus.
First, invention compound Inv-4 and compound HA were co-deposited on the surface on which the transparent electrode was formed so as to cover the transparent electrode, thereby forming a hole injection layer having a thickness of 10 nm. The mass ratio of invention compound Inv-4 to compound HA (Inv-4:HA) was 97:3.
Next, the invention compound Inv-4 was deposited on the hole injection layer to form a first hole transport layer with a thickness of 85 nm.
Next, compound HT-8 was vapor-deposited on the first hole-transporting layer to form a second hole-transporting layer having a thickness of 5 nm.
Next, compound BH-4 (host material) and compound BD-3 (dopant material) were co-deposited on the second hole transport layer to form a light-emitting layer with a thickness of 20 nm. The mass ratio of compound BH-4 to compound BD-3 (BH-4:BD-3) was 99:1.
Next, the compound ET-5 was deposited on the light-emitting layer to form a first electron-transporting layer having a thickness of 5 nm.
Next, compound ET-6 and Liq were co-deposited on the first electron transport layer to form a second electron transport layer with a thickness of 31 nm. The mass ratio of compound ET-6 to Liq (ET-6:Liq) was 50:50.
Next, Liq was vapor-deposited on the second electron-transporting layer to form an electron-injecting electrode with a film thickness of 1 nm.
Then, metal Al was vapor-deposited on this electron-injecting electrode to form a metal cathode having a film thickness of 80 nm.
The external quantum efficiency (EQE) of the organic EL device (III) of Example 4 thus obtained was measured in the same manner as in Example 1. The results are shown in Table 3, and the layer structure of the organic EL device (III) of Example 4 is shown below.

ITO (130)/Inv-4:HA=97:3 (10)/Inv-4 (85)/HT-8 (5)/BH-4:BD-3=99:1 (20)/ET-5 (5)/ET-6:Liq=50:50 (31)/Liq(1)/Al(80)

In the above layer structure, numbers in parentheses are film thicknesses (nm), and ratios are mass ratios.

Example 5
An organic EL device (III) was produced in the same manner as in Example 4 except that the invention compound Inv-6 was used instead of the invention compound Inv-4, and the external quantum efficiency (EQE) was measured. Table 3 shows the results.

Comparative example 3
An organic EL device (III) was produced in the same manner as in Example 4 except that the comparative compound Ref-2 was used instead of the invention compound Inv-4, and the external quantum efficiency (EQE) was measured. Table 3 shows the results.

As is clear from the results in Table 3, invention compounds Inv-4 and 6 provide organic EL devices with higher external quantum efficiencies than comparative compound Ref-2.

Invention compounds synthesized in Synthesis Examples

Intermediate Synthesis Example 1: Synthesis of Intermediate A

Under an argon atmosphere, 4-bromo-9,9-dimethylfluorene (16.4 g, 60.0 mmol), 2-chlorophenylboronic acid (9.38 g, 60.0 mmol), tetrakis(triphenylphosphine)palladium(0) ( 2.77 g, 2.40 mmol), 2M aqueous sodium carbonate solution (90 mL), and DME (dimethoxyethane) (200 mL) were stirred at 70° C. for 6 hours. After cooling the reaction solution to room temperature, the precipitated solid was collected by filtration. The obtained solid was purified by silica gel column chromatography to obtain 15.8 g of white solid. Yield was 86%.

Intermediate Synthesis Example 2: Synthesis of Intermediate B

Intermediate A (8.00 g, 26.2 mmol), 2-amino-9,9-dimethylfluorene (8.51 g, 40.7 mmol), tris(dibenzylideneacetone) dipalladium(0)(0) under argon atmosphere. .481 g, 0.525 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (SPhos) (0.862 g, 2.10 mmol), sodium-t-butoxide (3.03 g, 31.5 mmol), A mixture of toluene (131 mL) was stirred at 70° C. for 6 hours. After the reaction solution was cooled to room temperature, it was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography to obtain 12.0 g of white solid. Yield was 95%.

Intermediate Synthesis Example 3: Synthesis of Intermediate C

The same as in Intermediate Synthesis Example 2, except that 4-(2-chlorophenyl)spiro[9H-fluorene-9,2′-tricyclo[3.3.1.1 ^3,7 ]decane] is used instead of Intermediate A. was performed to obtain a white solid.

Intermediate Synthesis Example 4: Synthesis of Intermediate D

Under an argon atmosphere, 2-(9,9-dimethyl-9H-fluoren-4-yl)benzenamine 3.98 g (13.6 mmol), 2-bromobiphenyl 3.58 g (15.3 mmol), tris(dibenzylideneacetone ) Dipalladium (0) 0.255 g (0.279 mmol), tri-tert-butylphosphonium tetrafluoroborate 0.324 g (1.12 mmol), sodium-t-butoxide 1.47 g (15.3 mmol), toluene The 131 mL mixture was stirred at 110° C. for 3 hours. After the reaction solution was cooled to room temperature, it was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography to obtain 4.54 g of white solid. Yield was 74%.

Synthesis Example 1: Synthesis of Compound Inv-1

Intermediate A (3.20 g, 10.5 mmol), N-(1,1′-biphenyl-2-yl)-9,9-diphenylfluoren-2-amine (4.86 g, 10.0 mmol) under an argon atmosphere. ), tris(dibenzylideneacetone)dipalladium(0) (0.183 g, 0.200 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (SPhos) (0.328 g, 0.800 mmol), A mixture of lithium bis(trimethylsilyl)amide (1.0 M toluene solution) (14 mL) and toluene (67 mL) was refluxed for 6 hours. After the reaction solution was cooled to room temperature, it was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography and recrystallization to obtain 1.19 g of white solid. Yield was 15%.
The resulting compound was identified as compound Inv-1 by mass spectrum analysis (m/e=754 for molecular weight 753.99).

Synthesis Example 2: Synthesis of Compound Inv-2

Intermediate A (3.20 g, 10.5 mmol), N-[4-(dibenzo[b,d]furan-4-yl)phenyl][1,1′-biphenyl]-4-amine ( 4.12 g, 10.0 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.183 g, 0.200 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (SPhos) (0.183 g, 0.200 mmol). 328 g, 0.800 mmol), sodium-t-pentoxide (40% toluene solution) (4.2 mL) and toluene (67 mL) were refluxed for 6 hours. After the reaction solution was cooled to room temperature, it was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography and recrystallization to obtain 2.52 g of white solid. Yield was 37%.
The resulting compound was identified as compound Inv-2 by mass spectrometry (m/e=680 for a molecular weight of 679.86).

Synthesis Example 3: Synthesis of Compound Inv-3

2-bromo-9,9-dimethylfluorene in place of Intermediate A in Synthesis Example 1, N-[4-(dibenzo[b,d]furan-4-yl)phenyl][1,1′-biphenyl] A similar procedure was followed except that Intermediate B was used instead of -4-amine and tri-tert-butylphosphonium tetrafluoroborate was used instead of Sphos to give a white solid.
The resulting compound was identified as compound Inv-3 by mass spectrometry (m/e=670 for a molecular weight of 669.91).

Synthesis Example 4: Synthesis of Compound Inv-4

N-[4-(dibenzo[b,d]furan-4-yl)phenyl][1,1′-biphenyl] 2-bromo-9,9-diphenylfluorene in place of Intermediate A in Synthesis Example 1 A similar procedure was followed except that Intermediate B was used instead of -4-amine and tri-tert-butylphosphonium tetrafluoroborate was used instead of Sphos to give a white solid.
The resulting compound was identified as compound Inv-4 by mass spectrometry (m/e=794 for a molecular weight of 794.05).

Synthesis Example 5: Synthesis of Compound Inv-5

4-bromodibenzofuran in place of Intermediate A and N-[4-(dibenzo[b,d]furan-4-yl)phenyl][1,1′-biphenyl]-4-amine in Synthesis Example 1 A white solid was obtained by the same procedure except that Intermediate C was used in , and tri-tert-butylphosphonium tetrafluoroborate was used instead of SPhos.
The resulting product was identified as compound Inv-5 by mass spectroscopy (m/e=736 for a molecular weight of 735.97).

Synthesis Example 6: Synthesis of Compound Inv-6

Intermediate D 4.38 g (10.0 mmol), 2-bromo-9-phenyl-9-methyl-fluorene 3.35 g (10.0 mmol), tris(dibenzylideneacetone) dipalladium (0), under argon atmosphere. A mixture of 460 g (0.500 mmol), tri-tert-butylphosphonium tetrafluoroborate 0.580 g (2.00 mmol), lithium bis(trimethylsilyl)amide (1.0 M toluene solution) 30 mL, and toluene 50 mL was heated to 100°C. and stirred for 4.5 hours. After the reaction solution was cooled to room temperature, it was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography and recrystallization to obtain 4.92 g of white solid. Yield was 71%.
The obtained product was the compound Inv-6 according to mass spectrometry (m/e=692 for a molecular weight of 691.92).

Reference Signs List

1, 11, 12 organic EL element 2 substrate 3 anode 4 cathode 5 light-emitting layer 5a first light-emitting layer 5b second light-emitting layer 6 hole transport zone (hole transport layer)
6a hole injection layer 6b first hole transport layer 6c second hole transport layer 6d third hole transport layer 7 electron transport zone (electron transport layer)
7a first electron transport layer 7b second

electron transport layer

10, 20, 30 light emitting unit

Claims

A compound represented by the following formula (1).

(In the formula,
N * is the central nitrogen atom;
Ra and Rb are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, provided that Ra and Rb may be bonded to each other to form a substituted or unsubstituted spiro ring. may or may not be attached to each other and thus not form a spiro ring;
R 1 to R 3 are hydrogen atoms, provided that at least one adjacent two selected from R 1 to R 3 may combine with each other to form one or more unsubstituted benzene rings, may not be attached to each other and therefore not form a ring;
R 5 to R 8 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 30 ring-forming atoms, provided that at least one adjacent two selected from R 5 to R 8 are bonded to each other to form one or more unsubstituted benzene rings or may not be attached to each other and thus not form a ring;
R 11 to R 14 are hydrogen atoms, and adjacent two selected from R 11 to R 14 are not bonded to each other and thus do not form a ring;
L 1 and L 2 are each independently a single bond or an unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, provided that the arylene group consists only of a 6-membered ring;
Ar 1 and Ar 2 each independently represent a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms, or the following formula (a ), provided that the aryl group consists only of a 6-membered ring. )

(In the formula,
*1 is the point of attachment to one or both of L1 and L2 ;
One of Rc and Rd is a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring atoms, or a substituted or unsubstituted 5 to 30 ring atoms. a heteroaryl group, the other being a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms;
provided that Rc and Rd may bind to each other to form a substituted or unsubstituted spiro ring, or may not bind to each other to form a spiro ring;
R 21 to R 24 are hydrogen atoms, with the proviso that one selected from R 21 , R 22 and R 23 is a single bond that bonds to *2 and is selected from R 21 to R 24 that are not the single bond at least one adjacent two may be joined together to form one or more unsubstituted benzene rings or may not be joined together and thus do not form a ring;
R 25 to R 28 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 30 ring-forming atoms, provided that at least one adjacent two selected from R 25 to R 28 are bonded to each other to form one or more unsubstituted benzene rings or may not be attached to each other and thus not form a ring. )
Ar 1 and Ar 2 are each independently represented by the formula (a) or the following formula (1a), (1c), (1d), (1e), or (1f). Compound.

(In the formula,
*21 is the point of attachment to one or both of L1 and L2 ;
R 101 to R 105 and R 106 to R 110 are each independently a hydrogen atom, an unsubstituted alkyl group having 1 to 6 carbon atoms, or an unsubstituted aryl group having 6 to 12 ring carbon atoms, provided that one selected from R 101 to R 105 is a single bond that bonds to *22, and one selected from R 106 to R 110 is a single bond that bonds to *23;
adjacent two selected from R 101 to R 105 which are not single bonds are not bonded to each other and thus do not form a ring;
adjacent two selected from R 106 to R 110 which are not single bonds are not bonded to each other and thus do not form a ring;
m is 0 or 1 and n is 0 or 1;
R 111 to R 115 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 13 ring-forming atoms;
However, adjacent two selected from R 111 to R 115 may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other to form a ring. good too. )

(In the formula,
*24 is the binding position to one or both of L1 and L2 .
R 121 to R 128 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms.
provided that one selected from R 121 to R 128 is a single bond that bonds to *25, and two adjacent R 121 to R 128 that are not single bonds are not bonded to each other, thus forming a ring. do not form )

(In the formula,
*26 is the point of attachment to one or both of L1 and L2 ;
R 131 to R 140 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that one selected from R 131 to R 140 is a single bond that bonds to *27, and two adjacent R 131 to R 140 that are not single bonds are not bonded to each other, thus forming a ring. do not form )

(In the formula,
*28 is the point of attachment to one or both of L1 and L2 ;
X is an oxygen atom, a sulfur atom, or NRA ;
R A is a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
R 141 to R 148 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 13 ring-forming atoms with the proviso that one selected from R 141 to R 148 and R A is a single bond bonded to *29;
At least one adjacent two selected from R 141 to R 148 which are not single bonds may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other, therefore It does not have to form a ring. )

(In the formula,
*30 is the point of attachment to one or both of L1 and L2 ;
R 151 to R 155 are each independently a hydrogen atom, an unsubstituted alkyl group having 1 to 6 carbon atoms, or an unsubstituted phenyl group;
provided that one selected from R 151 to R 155 is a single bond that bonds to *31, and the other one selected from R 151 to R 155 is a single bond that bonds to *32;
Adjacent two selected from R 151 to R 155 that are not the single bond that bonds to *31 nor the single bond that bonds to *32 are not bonded to each other and therefore do not form a ring;
R 161 to R 165 and R 171 to R 175 are each independently a hydrogen atom or an unsubstituted alkyl group having 1 to 6 carbon atoms;
However, at least one adjacent two selected from R 161 to R 165 may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other to form a ring may not;
At least one adjacent two selected from R 171 to R 175 may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other and therefore do not form a ring. may )
3. The compound according to claim 1 or 2, wherein at least one of Ar 1 and Ar 2 is a group represented by formula (a), (1a) or (1e).
The compound according to any one of claims 1 to 3, wherein R 22 in formula (a) is a single bond attached to *2.
The compound according to any one of claims 1 to 4, wherein Ra and Rb do not form a spiro ring.
The compound according to any one of claims 1 to 4, wherein Ra and Rb are each independently an unsubstituted alkyl group having 1 to 6 carbon atoms.
A compound according to any one of claims 1 to 6, wherein both L 1 and L 2 are single bonds.
A compound represented by the following formula (2).

(In the formula,
N * is the central nitrogen atom;
Ra and Rb are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, provided that Ra and Rb may be bonded to each other to form a substituted or unsubstituted spiro ring. may or may not be attached to each other and thus not form a spiro ring;
R 1 to R 3 are hydrogen atoms, provided that at least one adjacent two selected from R 1 to R 3 may combine with each other to form one or more unsubstituted benzene rings, may not be attached to each other and therefore not form a ring;
R 5 to R 8 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 30 ring-forming atoms, provided that at least one adjacent two selected from R 5 to R 8 are bonded to each other to form one or more unsubstituted benzene rings or may not be attached to each other and thus not form a ring;
R 11 to R 14 are hydrogen atoms, and adjacent two selected from R 11 to R 14 are not bonded to each other and thus do not form a ring;
L 3 is a single bond or a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, provided that the arylene group consists only of a 6-membered ring;
R 31 to R 34 are hydrogen atoms, with the proviso that one selected from R 31 , R 32 and R 33 is a single bond that binds to *3 and is selected from R 31 to R 34 that is not a single bond at least one adjacent two may be joined together to form one or more unsubstituted benzene rings or may not be joined together and thus do not form a ring;
R 35 to R 38 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 30 ring-forming atoms, provided that at least one adjacent two selected from R 35 to R 38 are bonded to each other to form one or more unsubstituted benzene rings or may not be attached to each other and thus not form a ring;
Ar 3 is a group represented by any of the following formulas (1a-2), (1c-2), (1d-2), (1e-2), (1f-2), or (1g). )

(In the formula,
*41 is the point of attachment to the central nitrogen atom N * ;
L 21 is a single bond or an unsubstituted biphenylene group;
R 181 to R 185 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, and adjacent two selected from R 181 to R 185 are not bonded to each other; does not form a ring. )

(In the formula,
*24 is the point of attachment to the central nitrogen atom N * ;
L 22 is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
R 121 to R 128 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that one selected from R 121 to R 128 is a single bond that bonds to *25, and two adjacent R 121 to R 128 that are not single bonds are not bonded to each other, thus forming a ring. do not form )

(In the formula,
*26 is the point of attachment to the central nitrogen atom N * ;
L 23 is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
R 131 to R 140 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that one selected from R 131 to R 140 is a single bond that bonds to *27, and two adjacent R 131 to R 140 that are not single bonds are not bonded to each other, thus forming a ring. do not form )

(In the formula,
*42 is the point of attachment to the central nitrogen atom N * ;
L 24 is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
Y is an oxygen atom, a sulfur atom, NR A or CR B R C ;
R A is a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
R B and R C are each independently a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
provided that R B and R C may be bonded to each other to form a substituted or unsubstituted spiro ring, or may not be bonded to each other and thus do not form a spiro ring;
R 141 to R 148 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms, or a substituted or unsubstituted is a heteroaryl group having 5 to 13 ring-forming atoms;
with the proviso that one selected from R 141 to R 148 , R A , R B , and R C is a single bond that bonds to *43;
when L 24 is a single bond and Y is an oxygen atom or a sulfur atom, one selected from R 142 to R 147 is a single bond that bonds to *43;
At least one adjacent two selected from R 141 to R 148 which are not single bonds may be bonded to each other to form one or more unsubstituted benzene rings, or may not be bonded to each other, therefore It does not have to form a ring. )

(In the formula,
*30 is the point of attachment to the central nitrogen atom N * ;
L 25 is a single bond or an unsubstituted arylene group having 6 to 12 ring carbon atoms;
R 151 to R 155 are each independently a hydrogen atom, an unsubstituted alkyl group having 1 to 6 carbon atoms, or an unsubstituted phenyl group;
provided that one selected from R 151 to R 155 is a single bond that bonds to *31, and the other one selected from R 151 to R 155 is a single bond that bonds to *32;
Adjacent two selected from R 151 to R 155 that are not the single bond that bonds to *31 nor the single bond that bonds to *32 are not bonded to each other and therefore do not form a ring;
R 161 to R 165 and R 171 to R 175 are each independently a hydrogen atom or an unsubstituted alkyl group having 1 to 6 carbon atoms;
However, at least one adjacent two selected from R 161 to R 165 and R 171 to R 175 may be bonded to each other to form one or more unsubstituted benzene rings, or and therefore do not form a ring. )

(In the formula,
*44 is the point of attachment to the central nitrogen atom N * ;
R 181 to R 185 are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms;
with the proviso that one selected from R 181 , R 182 , R 184 and R 185 is a single bond that binds to *45;
adjacent two selected from R 181 , R 182 , R 184 and R 185 that are not single bonds bonded to R 183 and *45 are not bonded to each other and thus do not form a ring;
R 191 to R 195 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 ring carbon atoms;
Two adjacent groups selected from R 191 to R 195 are not bonded to each other and thus do not form a ring. )
The compound according to claim 8, wherein Ra and Rb do not form a spiro ring.
The compound according to claim 8 or 9, wherein Ra and Rb are each independently an unsubstituted alkyl group having 1 to 6 carbon atoms.
The compound according to any one of claims 8 to 10, wherein R 32 is a single bond attached to *3.
A compound according to any one of claims 8 to 11, wherein L3 is a single bond.
The compound according to any one of claims 8 to 12, wherein Ar 3 is a group represented by formula (1a-2) or (1g).
The compound according to any one of claims 8 to 13, wherein Ar 3 is a group represented by formula (1e-2).
The compound according to any one of claims 8 to 14, wherein Y in formula (1e-2) is CR B R C.
The compound according to any one of claims 8 to 15, wherein R 143 in formula (1e-2) is a single bond attached to *43.
The compound according to any one of claims 1 to 16, which contains at least one deuterium atom.
A material for an organic electroluminescence device containing the compound according to any one of claims 1 to 17.
A hole transport layer material containing the compound according to any one of claims 1 to 17.
An organic electroluminescence device having a cathode, an anode, and an organic layer between the cathode and the anode, wherein the organic layer comprises a light-emitting layer, and at least one of the organic layers is any one of claims 1 to 17. 2. An organic electroluminescence device comprising the compound according to item 1.
21. The organic electroluminescence device according to claim 20, wherein the organic layer includes a hole-transporting zone between the anode and the light-emitting layer, and the hole-transporting zone contains the compound.
The hole-transporting zone comprises a first hole-transporting layer on the anode side and a second hole-transporting layer on the cathode side, wherein one or both of the first hole-transporting layer and the second hole-transporting layer comprises the compound The organic electroluminescence device according to claim 21, comprising:
The organic electroluminescence device according to claim 22, wherein the light emitting layer and the second hole transport layer are in direct contact.
24. The organic electroluminescence device according to claim 22 or 23, wherein the sum of the thickness of the first hole transport layer and the thickness of the second hole transport layer is 30 nm or more and 150 nm or less.
The hole-transporting zone includes a first hole-transporting layer, a second hole-transporting layer and a third hole-transporting layer in order from the anode side, and only one layer selected from the first to third hole-transporting layers; 22. The organic electroluminescence device according to claim 21, wherein only two layers selected from the first to third hole transport layers or all of the first to third hole transport layers contain the compound.
The organic electroluminescence device according to claim 25, wherein the light emitting layer and the third hole transport layer are in direct contact.
27. The organic electroluminescence device according to claim 25 or 26, wherein the sum of the thickness of said first hole transport layer and the thickness of said second hole transport layer is 30 nm or more and 150 nm or less.
The organic electroluminescence device according to any one of claims 20 to 27, wherein the light-emitting layer is a single layer.
The organic electroluminescence device according to any one of claims 20 to 28, wherein the light-emitting layer contains a light-emitting compound that emits fluorescence with a main peak wavelength of 500 nm or less.
The organic electroluminescence device according to any one of claims 20 to 29, wherein the light-emitting layer contains a fluorescent dopant material.
An electronic device comprising the organic electroluminescence element according to any one of claims 20-30.