JP2023158646A - Composition and light-emitting device using them - Google Patents

Abstract

To provide a composition capable of reducing a driving voltage of a light-emitting device, and provide a light-emitting device using the composition.SOLUTION: A composition contains a compound expressed by a formula (FH); and a high molecular compound (B) containing a constitutional unit having a fused heterocyclic skeleton (b) containing one kind of atoms selected from a boron atom and a nitrogen atom which does not form a double bond in a ring. [Chemical formula 1] [In the formula, n1H represents an integer of 0 or larger. Ar1H represents a group obtained by removing n1H hydrogen atoms directly binding to the atoms constituting the ring from polycyclic aromatic hydrocarbons. This group may include an aryl group, an univalent heterocyclic group, and a substitutional group other than a substitutional amino group. R1H represents an aryl group or a univalent heterocyclic group, and those groups may include a substitutional group. However, the univalent heterocyclic group includes a ring skeleton different from the fused heterocyclic skeleton (b).]SELECTED DRAWING: None

Description

The present invention relates to a composition and a light emitting device using the same.

The organic luminescence phenomenon refers to a phenomenon in which when electrical energy is applied to an organic substance, it is converted into light energy. A light-emitting element that utilizes an organic light-emitting phenomenon has a structure that includes an anode and a cathode, and an organic layer that performs a light-emitting function between the anode and the cathode.

Among light-emitting materials, polymer light-emitting materials can easily form a uniform light-emitting layer using a coating method such as an inkjet method or a spin coating method. Therefore, the polymer light emitting material does not require a vacuum process when manufacturing a light emitting device, and it is easy to increase the area of the light emitting device. Furthermore, polymeric light-emitting materials can offer advantages such as ease of incorporating various functions into one material.

As a polymeric luminescent material, for example, a composition containing a polymeric compound containing a structural unit represented by the following formula and a polymeric compound containing a structural unit containing a chain of anthracene rings or pyrene rings is known. (Patent Document 1).

Japanese Patent Application Publication No. 2012-144722

However, the light emitting device manufactured using this composition has a problem in that the driving voltage of the light emitting device is high.
Therefore, an object of the present invention is to provide a composition that can lower the driving voltage of a light emitting element, and a light emitting element using the composition.

The present invention provides the following aspects [1] to [13].

[1]
A structural unit having a compound (A) represented by formula (FH) and a fused heterocyclic skeleton (b) containing in the ring one type of atom selected from a boron atom and a nitrogen atom that does not form a double bond. A composition comprising a polymer compound (B) containing the following.

[In the formula,
n ^1H represents an integer of 0 or more.
Ar ^1H represents a group obtained by removing n ^1H hydrogen atoms directly bonded to atoms constituting the ring from a polycyclic aromatic hydrocarbon, and this group includes an aryl group, a monovalent heterocyclic group, and a substituted amino group. It may have a substituent other than the group. When a plurality of substituents exist, they may be the same or different, and may be bonded to each other to form a ring with the atoms to which they are bonded.
R ^1H represents an aryl group or a monovalent heterocyclic group, and these groups may have a substituent. When a plurality of substituents exist, they may be the same or different, and may be bonded to each other to form a ring with the atoms to which they are bonded. When a plurality of R ^1Hs exist, they may be the same or different. However, the monovalent heterocyclic group has a ring skeleton different from the fused heterocyclic skeleton (b). ]

[2]
A polymer comprising a compound represented by formula (C) and a structural unit having a fused heterocyclic skeleton (b) containing in the ring one type of atom selected from a boron atom and a nitrogen atom that does not form a double bond. A composition comprising a molecular compound (B).

[In the formula,
Ring R ^1C and ring R ^2C each independently represent an aromatic hydrocarbon ring, and these rings may have a substituent. When a plurality of the substituents are present, they may be bonded to each other to form a ring with the atoms to which they are bonded.
Y ^a is a group represented by -C(R ^Xa ) ₂ -, a group represented by -C(R ^Xa ) ₂ -C(R ^Xa ) ₂ -, -C(R ^Xa )=C( ^R )-- or represents a group represented by formula (C'). R ^Xa represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group, a substituted amino group, or a halogen atom; It may have. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded. A plurality of R ^Xa may be the same or different, and may be bonded to each other to form a ring with the atoms to which they are bonded. ]

[In the formula,
Ring R ^3C and ring R ^4C each independently represent an aromatic hydrocarbon ring or an aromatic heterocycle, and these rings may have a substituent. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded. ]

[3]
The composition according to [1] or [2], wherein the polymer compound (B) is a polymer compound containing a structural unit having a residue of a compound represented by formula (1).

[In the formula,
Ring A, ring B, and ring C each independently represent an aromatic hydrocarbon ring or an aromatic heterocycle, and these rings may have a substituent. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded.
X represents a boron atom or a nitrogen atom.
Y ¹ , Y ² and Y ³ each independently represent a single bond, an oxygen atom, a group represented by -N(Ry)-, a group represented by -B(Ry)-, a sulfur atom, a selenium atom, Represents an alkylene group or a cycloalkylene group. Ry represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded. When multiple Rys exist, they may be the same or different. Ry may be bonded to the A ring, the B ring, or the C ring directly or via a linking group.
n2 is 0 or 1. When n2 is 0, -Y ² - does not exist.
n3 is 0 or 1. When n3 is 0, -Y ³ - does not exist. ]

[4]
The composition according to any one of [1] to [3], wherein Y ^a is a group represented by -C(R ^Xa ) ₂ - or a group represented by formula (C').

[5]
Any one of [1] to [4], wherein R ^Xa is an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. Composition of.

[6]
The composition according to any one of [3] to [5], wherein Y ¹ , Y ² and Y ³ are an oxygen atom or a group represented by -N(Ry)-.

[7]
Any one of [2] to [6], wherein the compound represented by formula (C) is a compound represented by formula (C-2) or a compound represented by formula (C'-2). Compositions as described.

[In the formula, R ^Xa represents the same meaning as above.
E ^11C , E ^12C , E ^13C , E ^14C , E ^21C , E ^22C , E ^23C , E ^24C represent carbon atoms, E ^31C , E ^32C , E ^33C , E ^34C , E ^41C , E ^42C , E ^43C and E ^44C each independently represent a nitrogen atom or a carbon atom.
R ^11C , R ^12C , R ^13C , R ^14C , R 21C , R ^22C , R ^23C , R ^24C , R ^31C , R ^32C , R ^{33C ,} R ^34C , R ^41C , R ^42C , R ^43C and R ^44C are each independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group, a substituted amino group, or a halogen atom; may have. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded.
When E ^31C is a nitrogen atom, R ^31C is not present. When E ^32C is a nitrogen atom, R ^32C is not present. When E ^33C is a nitrogen atom, R ^33C is not present. When E ^34C is a nitrogen atom, R ^34C is not present. When E ^41C is a nitrogen atom, R ^41C is not present. When E ^42C is a nitrogen atom, R ^42C is not present. When E ^43C is a nitrogen atom, R ^43C is not present. When E ^44C is a nitrogen atom, R ^44C is not present.
R ^11C and R ^12C , R ^12C and R ^13C , R ^13C and R ^14C , R ^14C and R ^34C , R ^34C and R ^33C , R ^33C and R ^32C , R ^32C and R ^31C , R ^31C and R ^41C , R ^41C and R ^42C , R ^42C and R ^43C , R ^43C and R ^44C , R ^44C and R ^24C , R ^24C and R ^23C , R ^23C and R ^22C , R ^22C and R ^21C , and R ^21C and R ^11C are respectively They may be bonded to form a ring together with the carbon atoms to which they are bonded. ]

[8]
The composition according to [7], wherein the E ^31C , the E ^32C , the E ^33C , the E ^34C , the E ^41C , the E ^42C , the E ^43C and the E ^44C are carbon atoms.

[9]
The composition according to any one of [2] to [7], wherein the compound represented by the formula (C) is a compound represented by the formula (C-2).

[10]
The composition according to any one of [1] to [9], wherein the polymer compound (B) further contains a structural unit represented by formula (Y).

[In the formula, Ar ^Y1 represents an arylene group, a divalent heterocyclic group, or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are directly bonded; The group may have a substituent. However, the structural unit represented by formula (Y) has a fused heterocyclic skeleton (b) containing in the ring one type of atom selected from the boron atom and a nitrogen atom that does not form a double bond. Different from unit. ]

[11]
The composition according to any one of [1] to [10], wherein the polymer compound (B) further contains a structural unit represented by formula (X).

[In the formula,
a ¹ and a ² each independently represent an integer of 0 or more.
Ar ^X1 and Ar ^X3 each independently represent an arylene group or a divalent heterocyclic group, and these groups may have a substituent.
Ar ^X2 and Ar ^X4 each independently represent an arylene group, a divalent heterocyclic group, or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are directly bonded and these groups may have a substituent. When a plurality of Ar ^X2 and Ar ^X4 exist, they may be the same or different.
R ^X1 , R ^X2 and R ^X3 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. When a plurality of R ^X2 and R ^X3 exist, they may be the same or different. ]

[12]
Any one of [1] to [11], further containing at least one selected from the group consisting of a hole transport material, a hole injection material, an electron transport material, an electron injection material, a luminescent material, an antioxidant, and a solvent. The composition described in .

[13]
A light emitting device containing the composition according to any one of [1] to [12].

According to the present invention, a composition useful for manufacturing a light emitting element with low driving voltage can be provided. Further, according to the present invention, a light emitting element containing this composition can be provided.

Hereinafter, preferred embodiments of the present invention will be described in detail.

<Explanation of common terms>
Terms commonly used herein have the following meanings unless otherwise specified.

"Room temperature" means 25°C.
Me represents a methyl group, Et represents an ethyl group, Bu represents a butyl group, i-Pr represents an isopropyl group, and t-Bu represents a tert-butyl group.
The hydrogen atom may be a deuterium atom or a light hydrogen atom.
In the formula representing a metal complex, a solid line representing a bond with the central metal means a covalent bond or a coordinate bond.

"Low molecular compound" means a compound that has no molecular weight distribution and has a molecular weight of 1×10 ⁴ or less.

The term “polymer compound” refers to a polymer having a molecular weight distribution and a number average molecular weight of 1×10 ³ or more (for example, 1×10 ³ to 1×10 ⁸ ) in terms of polystyrene.
"Structural unit" means one or more units present in a polymer compound. Two or more structural units contained in a polymer compound are generally also called "repeat units."
The polymer compound may be a block copolymer, a random copolymer, an alternating copolymer, a graft copolymer, or may have other forms.
The terminal group of the polymer compound is preferably a stable group, since if the polymerization active group remains as it is, the luminescence characteristics may deteriorate when the polymer compound is used for producing a light emitting device. The terminal group of the polymer compound is preferably a group that is conjugated to the main chain, such as an aryl group or a monovalent heterocyclic group that is bonded to the main chain of the polymer compound via a carbon-carbon bond. can be mentioned.

The "alkyl group" may be either straight chain or branched. The number of carbon atoms in the straight chain alkyl group, not including the number of carbon atoms in substituents, is usually 1 to 50, preferably 1 to 30, and more preferably 1 to 20. The number of carbon atoms in the branched alkyl group, not including the number of carbon atoms in substituents, is usually 3 to 50, preferably 3 to 30, and more preferably 4 to 20.

The alkyl group may have a substituent. Examples of the alkyl group include methyl group, ethyl group, propyl group, isopropyl group, butyl group, 2-butyl group, isobutyl group, tert-butyl group, pentyl group, isoamyl group, 2-ethylbutyl group, hexyl group, and heptyl group. octyl group, 2-ethylhexyl group, 3-propylheptyl group, decyl group, 3,7-dimethyloctyl group, 2-ethyloctyl group, 2-hexyldecyl group and dodecyl group. In addition, an alkyl group is a group in which some or all of the hydrogen atoms in these groups are substituted with a substituent (for example, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, a fluorine atom, etc.) (for example, Trifluoromethyl group, pentafluoroethyl group, perfluorobutyl group, perfluorohexyl group, perfluorooctyl group, 3-phenylpropyl group, 3-(4-methylphenyl)propyl group, 3-(3,5-di -hexylphenyl)propyl group, 6-ethyloxyhexyl group).

The number of carbon atoms in the "cycloalkyl group", not including the number of carbon atoms in substituents, is usually 3 to 50, preferably 3 to 30, and more preferably 4 to 20.
The cycloalkyl group may have a substituent. Examples of the cycloalkyl group include a cyclohexyl group and a group in which some or all of the hydrogen atoms in the group are substituted with a substituent.

The "alkenyl group" may be either straight chain or branched. The number of carbon atoms in the straight chain alkenyl group, not including the number of carbon atoms in substituents, is usually 2 to 30, preferably 3 to 20. The number of carbon atoms in the branched alkenyl group, not including the number of carbon atoms in substituents, is usually 3 to 30, preferably 4 to 20.
The alkenyl group may have a substituent. Examples of the alkenyl group include vinyl group, 1-propenyl group, 2-propenyl group, 2-butenyl group, 3-butenyl group, 3-pentenyl group, 4-pentenyl group, 1-hexenyl group, 5-hexenyl group, Examples include a 7-octenyl group and groups in which some or all of the hydrogen atoms in these groups are substituted with substituents.

The number of carbon atoms in the "cycloalkenyl group", not including the number of carbon atoms in substituents, is usually 3 to 30, preferably 4 to 20.
The cycloalkenyl group may have a substituent. Examples of the cycloalkenyl group include a 5-cyclohexenyl group and a group in which some or all of the hydrogen atoms in these groups are substituted with a substituent.

The "alkynyl group" may be either straight chain or branched. The number of carbon atoms in a straight chain alkynyl group, excluding carbon atoms of substituents, is usually 2 to 20, preferably 3 to 20. The number of carbon atoms in the branched alkynyl group, excluding carbon atoms of substituents, is usually 4 to 30, preferably 4 to 20.
The alkynyl group may have a substituent. Examples of the alkynyl group include ethynyl group, 1-propynyl group, 2-propynyl group, 2-butynyl group, 3-butynyl group, 3-pentynyl group, 4-pentynyl group, 1-hexynyl group, 5-hexynyl group, and groups in which some or all of the hydrogen atoms in these groups are substituted with substituents.

The number of carbon atoms in the "cycloalkynyl group", excluding carbon atoms of substituents, is usually 4 to 30, preferably 4 to 20.
The cycloalkynyl group may have a substituent. Examples of the cycloalkynyl group include a 5-cyclohexynyl group and groups in which some or all of the hydrogen atoms in these groups are substituted with substituents.

The "alkoxy group" may be either linear or branched. The number of carbon atoms in the straight chain alkoxy group, not including the number of carbon atoms in substituents, is usually 1 to 40, preferably 4 to 10. The number of carbon atoms in the branched alkoxy group, not including the number of carbon atoms in substituents, is usually 3 to 40, preferably 4 to 10.
The alkoxy group may have a substituent. Examples of the alkoxy group include methoxy group, ethoxy group, propyloxy group, isopropyloxy group, butyloxy group, isobutyloxy group, tert-butyloxy group, pentyloxy group, hexyloxy group, heptyloxy group, octyloxy group, - Ethylhexyloxy group, nonyloxy group, decyloxy group, 3,7-dimethyloctyloxy group, lauryloxy group, and some or all of the hydrogen atoms in these groups are substituents (for example, cycloalkyl group, alkoxy group, Examples include groups substituted with cycloalkoxy groups, aryl groups, fluorine atoms, etc.).

The number of carbon atoms in the "cycloalkoxy group", not including the number of carbon atoms in substituents, is usually 3 to 40, preferably 4 to 10.
The cycloalkoxy group may have a substituent. Examples of the cycloalkoxy group include a cyclohexyloxy group and a group in which some or all of the hydrogen atoms in the group are substituted with a substituent.

The number of carbon atoms in the "aryloxy group" is usually 6 to 60, and preferably 6 to 48, not including the number of carbon atoms in substituents.
The aryloxy group may have a substituent. Examples of the aryloxy group include phenoxy group, 1-naphthyloxy group, 2-naphthyloxy group, 1-anthracenyloxy group, 9-anthracenyloxy group, 1-pyrenyloxy group, and Examples include groups in which part or all of the hydrogen atoms are substituted with a substituent (eg, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, a fluorine atom, etc.).

"Aromatic hydrocarbon group" means a group obtained by removing one or more hydrogen atoms directly bonded to a carbon atom constituting a ring from an aromatic hydrocarbon. A group obtained by removing one hydrogen atom directly bonded to a carbon atom constituting a ring from an aromatic hydrocarbon is also referred to as an "aryl group." A group obtained by removing two hydrogen atoms directly bonded to carbon atoms constituting a ring from an aromatic hydrocarbon is also referred to as an "arylene group."
The number of carbon atoms in the aromatic hydrocarbon group, not including the number of carbon atoms in substituents, is usually 6 to 60, preferably 6 to 40, and more preferably 6 to 20.

Examples of the "aromatic hydrocarbon group" include monocyclic aromatic hydrocarbons (for example, benzene), or polycyclic aromatic hydrocarbons (for example, naphthalene, indene, naphthoquinone, indenone). and bicyclic aromatic hydrocarbons such as tetralone; tricyclic aromatic hydrocarbons such as anthracene, phenanthrene, dihydrophenanthrene, fluorene, anthraquinone, phenantoquinone, and fluorenone; benzanthracene, benzophenanthrene, benzofluorene, pyrene and 4-ring aromatic hydrocarbons such as fluoranthene; 5-ring aromatic hydrocarbons such as dibenzoanthracene, dibenzophenanthrene, dibenzofluorene, indenofluorene, perylene and benzofluoranthene; 6-rings such as spirobifluorene and heptocyclic aromatic hydrocarbons such as benzospirobifluorene and acenaphthofluoranthene. Groups other than the above may be mentioned. The aromatic hydrocarbon group includes a group in which a plurality of these groups are bonded. The aromatic hydrocarbon group may have a substituent.

Examples of the aryl group include phenyl group, 1-naphthyl group, 2-naphthyl group, 1-anthracenyl group, 2-anthracenyl group, 9-anthracenyl group, 1-pyrenyl group, 2-pyrenyl group, 4-pyrenyl group, 2-fluorenyl group, 3-fluorenyl group, 4-fluorenyl group, 2-phenylphenyl group, 3-phenylphenyl group, 4-phenylphenyl group, and some or all of the hydrogen atoms in these groups are substituents. Examples include groups substituted with substituted groups (eg, alkyl groups, cycloalkyl groups, alkoxy groups, cycloalkoxy groups, fluorine atoms, etc.).

Examples of the arylene group include a phenylene group, a naphthalenediyl group, an anthracenediyl group, a phenanthrenediyl group, a dihydrophenanthrenediyl group, a naphthacenediyl group, a fluorenediyl group, a pyrenediyl group, a perylene diyl group, a chrysenediyl group, and Examples include groups in which some or all of the hydrogen atoms are substituted with substituents. The arylene group includes a group in which a plurality of these groups are bonded. The arylene group is preferably a group represented by formula (A-1) to formula (A-20).

[In the formula, R and R ^a each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group. A plurality of R and R ^a may be the same or different, and R ^a may be bonded to each other to form a ring with the atoms to which they are bonded. ]

The term "heterocyclic group" refers to a group obtained by removing one or more hydrogen atoms directly bonded to an atom (carbon atom or heteroatom) constituting a ring from a heterocyclic compound. Among the heterocyclic groups, an "aromatic heterocyclic group" which is a group obtained by removing one or more hydrogen atoms directly bonded to atoms constituting a ring from an aromatic heterocyclic compound is preferable. A group obtained by removing p hydrogen atoms (p represents an integer of 1 or more) directly bonded to the atoms constituting the ring from a heterocyclic compound is also referred to as a "p-valent heterocyclic group." A group obtained by removing p hydrogen atoms directly bonded to the atoms constituting the ring from an aromatic heterocyclic compound is also referred to as a "p-valent aromatic heterocyclic group."

Examples of "aromatic heterocyclic compounds" include oxadiazole, thiadiazole, thiazole, oxazole, thiophene, pyrrole, phosphole, furan, pyridine, pyrazine, pyrimidine, triazine, pyridazine, quinoline, isoquinoline, carbazole, and dibenzophosphole. Compounds in which the heterocycle itself is aromatic, such as phenoxazine, phenothiazine, dibenzoborole, dibenzosilole, benzopyran, etc., even if the heterocycle itself does not exhibit aromaticity, are compounds in which an aromatic ring is fused to the heterocycle. Examples include compounds that are

The number of carbon atoms in the heterocyclic group, not including the number of carbon atoms in substituents, is usually 1 to 60, preferably 2 to 40, and more preferably 3 to 20. The number of heteroatoms in the heterocyclic group is usually 1 to 30, preferably 1 to 10, more preferably 1 to 5, and still more preferably 1. ~3.

Examples of the heterocyclic group include monocyclic heterocyclic compounds (for example, furan, thiophene, oxadiazole, thiadiazole, pyrrole, diazole, triazole, tetrazole, pyridine, diazabenzene, and triazine), or, Polycyclic heterocyclic compounds (e.g. azanaphthalene, diazanaphthalene, benzofuran, benzothiophene, indole, azaindole, diazaindole, benzodiazole, benzothiadiazole, benzotriazole, benzothiophene dioxide, benzothiophene oxide and bicyclic heterocyclic compounds such as benzopyranone; dibenzofuran, dibenzothiophene, dibenzothiophene dioxide, dibenzothiophene oxide, dibenzopyranone, dibenzoborole, dibenzosilole, dibenzophosphole, dibenzoselenophene, carbazole, azacarbazole , diazacarbazole, phenoxazine, phenothiazine, 9,10-dihydroacridine, 5,10-dihydrophenazine, acridone, fenazaborin, phenophosphazine, phenoselenazine, phenazacillin, azaanthracene, diazaanthracene, azaphenanthrene and diaza Tricyclic heterocyclic compounds such as phenanthrene; Tetracyclic heterocyclic compounds such as hexaazatriphenylene, benzocarbazole, azabenzocarbazole, diazabenzocarbazole, benzonaphthofuran and benzonaphthothiophene; dibenzocarbazole, India Pentacyclic heterocyclic compounds such as locarbazole, indenocarbazole, azaindrocarbazole, diazaindrocarbazole, azaindenocarbazole and diazaindenocarbazole; carbazolocarbazole, benzindrocarbazole and benzoindenocarbazole 6-ring heterocyclic compounds such as; and 7-ring heterocyclic compounds such as dibenzoindolocarbazole and dibenzoindenocarbazole. Examples include groups in which one or more groups are removed. The heterocyclic group includes a group in which a plurality of these groups are bonded. The heterocyclic group may have a substituent (for example, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, a fluorine atom, etc.).

Examples of monovalent heterocyclic groups include thienyl group, pyrrolyl group, furyl group, pyridyl group, piperidinyl group, quinolinyl group, isoquinolinyl group, pyrimidinyl group, triazinyl group, and some of the hydrogen atoms in these groups or Examples include groups entirely substituted with substituents (eg, alkyl groups, cycloalkyl groups, alkoxy groups, cycloalkoxy groups, aryl groups, fluorine atoms), and the like.

The number of carbon atoms in the divalent heterocyclic group, not including the number of carbon atoms in substituents, is usually 2 to 60, preferably 3 to 20, and more preferably 4 to 15.
Examples of the divalent heterocyclic group include pyridine, diazabenzene, triazine, azanaphthalene, diazanaphthalene, carbazole, dibenzofuran, dibenzothiophene, dibenzosilole, phenoxazine, phenothiazine, acridine, dihydroacridine, furan, thiophene, azole, Examples include divalent groups obtained by removing two hydrogen atoms from among the hydrogen atoms directly bonded to carbon atoms or heteroatoms constituting the ring from diazole or triazole. The divalent heterocyclic group includes a group in which a plurality of these groups are bonded. The divalent heterocyclic group is preferably a group represented by formulas (AA-1) to (AA-34).

[In the formula, R and R ^a have the same meanings as above. ]

A "halogen atom" refers to a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom.

The "amino group" may have a substituent, and a substituted amino group (ie, a secondary amino group or a tertiary amino group, preferably a tertiary amino group) is preferable. The substituent that the amino group has is preferably an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. When the amino group has a plurality of substituents, they may be the same or different, or may be bonded to each other to form a ring with the nitrogen atom to which they are bonded.

Examples of substituted amino groups include dialkylamino groups, dicycloalkylamino groups, diarylamino groups, and those in which some or all of the hydrogen atoms in these groups are substituents (e.g., alkyl groups, cycloalkyl groups, alkoxy groups). , cycloalkoxy group, aryl group, fluorine atom, etc.).

Examples of substituted amino groups include dimethylamino group, diethylamino group, diphenylamino group, bis(methylphenyl)amino group, bis(3,5-di-tert-butylphenyl)amino group, and hydrogen in these groups. Examples include groups in which some or all of the atoms are substituted with a substituent (eg, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, a fluorine atom, etc.).

A "crosslinking group" is a group that can form a new bond by being subjected to heating, ultraviolet irradiation, near ultraviolet irradiation, visible light irradiation, infrared ray irradiation, radical reaction, etc., and is preferably a group with the formula ( B-1) to a group represented by any one of formulas (B-17). These groups may have a substituent.

Examples of the "substituent" include a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an aryl group, a monovalent heterocyclic group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an amino group, a substituted amino group, Examples include alkenyl groups, cycloalkenyl groups, alkynyl groups, and cycloalkynyl groups. The substituent may be a bridging group. In addition, when multiple substituents exist, they may be the same or different. Further, when a plurality of substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded, but it is preferable that they do not form a ring.

<Compound (A)>
Compound (A) is a compound represented by formula (FH) or a compound represented by formula (C). In the composition of this embodiment, it is preferable to use a compound that does not exhibit an organic luminescence phenomenon as the compound (A). Compound (A) is preferably a low molecular compound. The compound (A) is required to have properties that do not adversely affect the organic luminescence phenomenon of the composition of the present embodiment, and from this point of view, one preferred form is a compound that does not have the fused heterocyclic skeleton (b). In one more preferred form, compound (A) is a compound composed only of carbon atoms and hydrogen atoms. Compound (A) may be a single type of compound, or a combination of multiple types of compounds may be used.

The molecular weight of compound (A) is usually 1×10 ² to 1×10 ⁴ , preferably 2×10 ² to 5×10 ³ , more preferably 3×10 ² to 2×10 ³ . , more preferably 4×10 ² to 1×10 ³ .

n ^1H is usually an integer of 10 or less, and is preferably an integer of 7 or less, more preferably an integer of 5 or less, because it facilitates the synthesis of the compound represented by formula (FH), and It is preferably an integer of 3 or less, particularly preferably an integer of 2 or less.

Ar ^1H is a group obtained by removing n ^1H hydrogen atoms directly bonded to atoms constituting the ring from a polycyclic aromatic hydrocarbon group (hereinafter also referred to as "polycyclic aromatic hydrocarbon group"). This polycyclic aromatic hydrocarbon group may have a substituent other than an aryl group, a monovalent heterocyclic group, and a substituted amino group.
Examples of the polycyclic aromatic hydrocarbon in Ar ^1H include the polycyclic aromatic hydrocarbons in the aromatic hydrocarbons described in the section of the aromatic hydrocarbon group above.

The number of carbon atoms in the polycyclic aromatic hydrocarbon group in Ar ^1H is usually 7 to 60, preferably 8 to 40, more preferably 10, not including the number of carbon atoms in the substituents. ~30, and may be from 12 to 25. In Ar ^1H , the polycyclic aromatic hydrocarbon in the polycyclic aromatic hydrocarbon group is preferably a bicyclic to heptacyclic aromatic hydrocarbon because the driving voltage of the light emitting element of this embodiment is reduced. It is a hydrocarbon, more preferably a bicyclic to hexacyclic aromatic hydrocarbon, and may also be a tricyclic to pentacyclic aromatic hydrocarbon. In Ar ^1H , the polycyclic aromatic hydrocarbon in the polycyclic aromatic hydrocarbon group is preferably naphthalene, anthracene, phenanthrene, dihydrophenanthrene, since the driving voltage of the light emitting element of this embodiment is further reduced. , fluorene, benzanthracene, benzophenanthrene, benzofluorene, pyrene, fluoranthene, dibenzanthracene, dibenzophenanthrene, dibenzofluorene, perylene, benzofluoranthene, spirobifluorene, benzspirobifluorene or acenaphthofluoranthene, and more Preferably they are naphthalene, anthracene, phenanthrene, dihydrophenanthrene, fluorene, benzanthracene, benzophenanthrene, benzofluorene, pyrene, fluoranthene, dibenzoanthracene, dibenzophenanthrene, dibenzofluorene, benzofluoranthene or spirobifluorene, and more preferably , naphthalene, phenanthrene, dibenzophenanthrene, fluorene, benzanthracene, benzophenanthrene, benzofluorene, benzofluoranthene or spirobifluorene, particularly preferably phenanthrene, dibenzophenanthrene, fluorene or spirobifluorene, particularly preferably , fluorene or spirobifluorene.

The substituent that Ar ^1H may have is a substituent other than an aryl group, a monovalent heterocyclic group, and a substituted amino group, and preferably a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, An alkoxy group, a cycloalkoxy group, an alkenyl group, or a cycloalkenyl group, more preferably a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, or a cycloalkoxy group, and still more preferably an alkyl group, a cycloalkyl group, It is an alkoxy group or a cycloalkoxy group, particularly preferably an alkyl group or a cycloalkyl group, and these groups may further have a substituent.

Examples and preferred ranges of substituents that Ar ^1H may further include include substituents that R ^1H may further include, as described below. The examples and preferred ranges of the groups are the same.

R ^1H is an aryl group or a monovalent heterocyclic group, and is preferably an aryl group because the driving voltage of the light emitting element of this embodiment is further reduced, and even if these groups have a substituent, good.

Examples of the aryl group in R ^1H include a benzene ring, a naphthalene ring, an anthracene ring, an indene ring, a fluorene ring, a spirobifluorene ring, a phenanthrene ring, a dihydrophenanthrene ring, a pyrene ring, a chrysene ring, a triphenylene ring, or Examples include a group in which one hydrogen atom directly bonded to a carbon atom constituting the ring is removed from a fused ring, and preferred are a benzene ring, a naphthalene ring, a fluorene ring, a spirobifluorene ring, a phenanthrene ring, and a dihydrocarbon ring. A group obtained by removing one hydrogen atom directly bonded to a carbon atom constituting the ring from a phenanthrene ring or triphenylene ring, and more preferably a carbon atom constituting the ring from a benzene ring, fluorene ring, or spirobifluorene ring. A group from which one hydrogen atom directly bonded to is removed, more preferably a phenyl group, and these groups may further have a substituent.

Examples of the monovalent heterocyclic group in R ^1H include a pyrrole ring, a diazole ring, a triazole ring, a furan ring, a thiophene ring, an oxadiazole ring, a thiadiazole ring, a pyridine ring, a diazabenzene ring, a triazine ring, an azanaphthalene ring, Diazanaphthalene ring, triazanaphthalene ring, azaanthracene ring, diazaanthracene ring, triazaanthracene ring, azaphenanthrene ring, diazaphenanthrene ring, triazaphenanthrene ring, dibenzofuran ring, dibenzothiophene ring, dibenzosilole ring, dibenzo Carbon atoms constituting a ring from a phosphole ring, a carbazole ring, an azacarbazole ring, a diazacarbazole ring, a phenoxazine ring, a phenothiazine ring, a dihydroacridine ring, a dihydrophenazine ring, or a ring in which an aromatic ring is fused to these rings. Examples include groups from which one hydrogen atom directly bonded to an atom or a heteroatom is removed, and preferred are a pyridine ring, a diazabenzene ring, a triazine ring, an azanaphthalene ring, a diazanaphthalene ring, a dibenzofuran ring, a dibenzothiophene ring, and a carbazole ring. , a group obtained by removing one hydrogen atom directly bonded to a carbon atom or hetero atom constituting the ring from an azacarbazole ring, diazacarbazole ring, phenoxazine ring or phenothiazine ring, more preferably a pyridine ring or diazabenzene. ring, triazine ring, dibenzofuran ring, dibenzothiophene ring, carbazole ring, azacarbazole ring, diazacarbazole ring, phenoxazine ring, phenothiazine ring, dihydroacridine ring or dihydrophenazine ring, to a carbon atom or a heteroatom constituting the ring. A group from which one directly bonded hydrogen atom has been removed, and more preferably a carbon atom constituting a ring from a dibenzofuran ring, dibenzothiophene ring, carbazole ring, phenoxazine ring, phenothiazine ring, dihydroacridine ring, or dihydrophenazine ring. or a group from which one hydrogen atom directly bonded to a hetero atom is removed, particularly preferably a group from which one hydrogen atom directly bonded to a carbon atom constituting the ring is removed from a dibenzofuran ring or a dibenzothiophene ring. , these rings may have a substituent.

The substituent that R ^1H may have is preferably a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, a monovalent heterocyclic group, or a substituted amino group. and more preferably an alkyl group, a cycloalkyl group, an aryl group, a monovalent heterocyclic group, or a substituted amino group, and even more preferably an alkyl group, a cycloalkyl group, or an aryl group, and these groups further include It may have a substituent.

Examples and preferred ranges of the aryl group and monovalent heterocyclic group in the substituent that R ^1H may have are the same as the examples and preferred ranges of the aryl group and monovalent heterocyclic group in R ^1H .

In the substituted amino group among the substituents that R ^1H may have, the substituent that the amino group has is preferably an aryl group or a monovalent heterocyclic group, more preferably an aryl group, and these groups are further substituted. It may have a group. Examples and preferred ranges of the aryl group that is a substituent on the amino group are the same as the example and preferred range of the aryl group in R ^1H . Examples and preferred ranges of the monovalent heterocyclic group that is a substituent on the amino group are the same as the examples and preferred range of the monovalent heterocyclic group in R ^1H .

The substituents that R ^1H may further include are preferably a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, 1 a valent heterocyclic group or a substituted amino group, more preferably an alkyl group, a cycloalkyl group, an aryl group, a monovalent heterocyclic group, or a substituted amino group, still more preferably an alkyl group, a cycloalkyl group, or an aryl group. are particularly preferably aryl groups, and these groups may further have a substituent, but preferably do not have any further substituent.

Examples and preferred ranges of aryl groups, monovalent heterocyclic groups, and substituted amino groups in the substituents ^{that R 1H may} have are as follows: Examples and preferred ranges of aryl groups, monovalent heterocyclic groups, and substituted amino groups as good substituents are the same.

<Compound represented by formula (C)>
In ring R ^1C and ring R ^2C , the number of carbon atoms in the aromatic hydrocarbon ring, not including the number of carbon atoms in substituents, is usually 6 to 60, preferably 6 to 30, more preferably 6. ~18.

Examples of the aromatic hydrocarbon ring in ring R ^1C and ring R ^2C include a benzene ring, a naphthalene ring, an anthracene ring, an indene ring, a fluorene ring, a spirobifluorene ring, a phenanthrene ring, a dihydrophenanthrene ring, a pyrene ring, and a chrysene ring. and triphenylene ring, preferably benzene ring, naphthalene ring, anthracene ring, fluorene ring, spirobifluorene ring, phenanthrene ring or dihydrophenanthrene ring, more preferably benzene ring, naphthalene ring, fluorene ring or spirobifluorene ring. A ring, more preferably a benzene ring, and these rings may have a substituent.

The substituents that ring R ^1C and ring R ^2C may have are preferably a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocycle. group or a substituted amino group, more preferably an alkyl group, a cycloalkyl group, an aryl group, a monovalent heterocyclic group, or a substituted amino group, still more preferably an alkyl group, a cycloalkyl group, an aryl group, or a monovalent group. is a heterocyclic group, particularly preferably an alkyl group, a cycloalkyl group or an aryl group, and these groups may further have a substituent.

Examples and preferred ranges of aryl groups, monovalent heterocyclic groups, and substituted amino groups in the substituents that ring R ^1C and ring R ^2C may have include aryl groups in the substituents that R ^1H may have. Examples and preferred ranges of groups, monovalent heterocyclic groups, and substituted amino groups are the same.

The substituents that ring R ^1C and ring R ^2C may further include are preferably a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, or a cycloalkoxy group. group, an aryl group, a monovalent heterocyclic group, or a substituted amino group, more preferably an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and even more preferably an alkyl group, a cycloalkyl group. or an aryl group, particularly preferably an aryl group or a cycloalkyl group, and these groups may further have a substituent, but preferably do not have a further substituent.

Examples and preferred ranges of aryl groups, monovalent heterocyclic groups, and substituted amino groups in the substituents that ring R ^1C and ring R ^2C may further include are R The examples and preferred ranges of the aryl group, monovalent heterocyclic group, and substituted amino group as substituents that ^1H may have are the same.

^R More preferably, it is an aryl group, and these groups may further have a substituent.

Examples and preferred ranges of substituents that R ^Xa may have are the same as examples and preferred ranges of substituents that R ^1H may have.

Examples and preferred ranges of substituents that R ^Xa may further include include substituents that R ^1H may further include. Same as examples and preferred ranges.

In this specification, the aryl group is preferably represented by formula (DA), formula (DB), or formula (DC) because the driving voltage of the light emitting element of this embodiment is further reduced. More preferably, it is a group represented by formula (DA) or formula (DC).

[In the formula,
m ^DA1 , m ^DA2 and m ^DA3 each independently represent an integer of 0 or more.
^GDA represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups may have a substituent.
Ar ^DA1 , Ar ^DA2 and Ar ^DA3 each independently represent an arylene group or a divalent heterocyclic group, and these groups may have a substituent. When there are multiple Ar ^DA1 , Ar ^DA2 and Ar ^DA3 , they may be the same or different.
^TDA represents an aryl group or a monovalent heterocyclic group, and these groups may have a substituent. A plurality of ^TDAs may be the same or different.
However, when m ^DA1 is 0, G ^DA is an aromatic hydrocarbon group, and when m ^DA1 is an integer of 1 or more, it is directly bonded to ring R ^1C , ring R ^2C , ring R ^3C or ring R ^4C Ar ^DA1 is an arylene group. ]

[In the formula,
m ^DA1 , m ^DA2 , m ^DA3 , m ^DA4 , m ^DA5 , m ^DA6 and m ^DA7 each independently represent an integer of 0 or more.
^GDA represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups may have a substituent. A plurality of ^GDAs may be the same or different.
Ar ^DA1 , Ar ^DA2 , Ar ^DA3 , Ar ^DA4 , Ar ^DA5 , Ar ^DA6 and Ar ^DA7 each independently represent an arylene group or a divalent heterocyclic group, and even if these groups have a substituent, good. When there are a plurality of Ar ^DA1 , Ar ^DA2 , Ar ^DA3 , Ar ^DA4 , Ar ^DA5 , Ar ^DA6 and Ar ^DA7 , they may be the same or different.
^TDA represents an aryl group or a monovalent heterocyclic group, and these groups may have a substituent. A plurality of ^TDAs may be the same or different.
However, when m ^DA1 is 0, G ^DA is an aromatic hydrocarbon group, and when m ^DA1 is an integer of 1 or more, it is directly bonded to ring R ^1C , ring R ^2C , ring R ^3C or ring R ^4C Ar ^DA1 is an arylene group. ]

[In the formula,
m ^DA1 represents an integer greater than or equal to 0.
Ar ^DA1 represents an arylene group or a divalent heterocyclic group, and these groups may have a substituent. When there are multiple Ar ^DA1s , they may be the same or different.
^TDA represents an aryl group or a monovalent heterocyclic group, and these groups may have a substituent.
However, when m ^DA1 is 0, T ^DA is an aryl group, and when m ^DA1 is an integer of 1 or more, Ar ^DA1 directly bonded to ring R ^1C , ring R ^2C , ring R ^3C or ring R ^4C is an arylene group. ]

m ^DA1 to m ^DA7 are usually integers of 10 or less, preferably 5 or less, and more preferably 0 or 1. It is preferable that m ^DA1 , m ^DA2 , m ^DA3 , m ^DA4 , m ^DA5 , m ^DA6 and m ^DA7 are the same integer.

^GDA is preferably a group represented by formula (GDA-11) to formula (GDA-15), more preferably a group represented by formula (GDA-11) to formula (GDA-14). , more preferably a group represented by formula (GDA-11) or formula (GDA-14), particularly preferably a group represented by formula (GDA-11).

[In the formula,
* represents a bond with Ar ^DA1 in formula (DA), Ar ^DA1 in formula (DB), Ar ^DA2 in formula (DB), or Ar ^DA3 in formula (DB).
** represents a bond with Ar ^DA2 in formula (DA), Ar ^DA2 in formula (DB), Ar ^DA4 in formula (DB), or Ar ^DA6 in formula (DB) .
*** represents a bond with Ar ^DA3 in formula (DA), Ar ^DA3 in formula (DB), Ar ^DA5 in formula (DB), or Ar ^DA7 in formula (DB). represent.
R ^DA represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocyclic group, and these groups may further have a substituent. When there are multiple ^RDAs , they may be the same or different. ]

^RDA is preferably a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, or a cycloalkoxy group, more preferably a hydrogen atom, an alkyl group, or a cycloalkyl group, and these groups have a substituent. However, it is preferable that it has no further substituent.

Ar ^DA1 to Ar ^DA7 are preferably a phenylene group, a fluorenediyl group, or a carbazolediyl group, more preferably formulas (A-1) to (A-3), formula (A-8), and formula ( A-9), a group represented by the formula (AA-10), the formula (AA-11), the formula (AA-33) or the formula (AA-34), more preferably a group represented by the formula (ArDA-1) to A group represented by formula (ArDA-5), particularly preferably a group represented by formula (ArDA-1) to formula (ArDA-3), particularly preferably a group represented by formula (ArDA-1) or formula ( ArDA-2), and these groups may have a substituent.

[In the formula,
^RDA represents the same meaning as above.
R ^DB represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. If there are multiple ^RDBs , they may be the same or different. ]

R ^DB is preferably an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, more preferably an aryl group or a monovalent heterocyclic group, even more preferably an aryl group, and these The group may have a substituent.

T ^DA is preferably a group represented by formulas (TDA-1) to (TDA-3), more preferably a group represented by formula (TDA-1).

[In the formula, R ^DA and R ^DB represent the same meanings as above. ]

Examples and preferred ranges of substituents that R ^DA , Ar ^DA1 to Ar ^DA7 , R ^DB and T ^DA may have include substituents that R ^1H may further have. The examples and preferred ranges of the groups are the same.

The group represented by formula (DA) is preferably a group represented by formula (DA1).

[In the formula,
R ^p1 and R ^p2 each independently represent an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, or a halogen atom. When a plurality of R ^p1 and R ^p2 exist, they may be the same or different.
np1 represents an integer from 0 to 5, and np2 represents an integer from 0 to 3. A plurality of np1s may be the same or different. ]

The group represented by formula (D-B) is preferably a group represented by formula (D-B1).

[In the formula,
R ^p1 and R ^p2 each independently represent an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, or a halogen atom. When a plurality of R ^p1 and R ^p2 exist, they may be the same or different.
np1 represents an integer from 0 to 5, and np2 represents an integer from 0 to 3. A plurality of np1 and np2 may be the same or different. ]

The group represented by formula (D-C) is preferably a group represented by formula (D-C1) to formula (D-C4), more preferably a group represented by formula (D-C1) to formula (D-C4). C3), more preferably a group represented by formula (D-C1) or formula (D-C2), particularly preferably a group represented by formula (D-C1) .

[In the formula,
R ^p4 and R ^p5 each independently represent an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, or a halogen atom. When there is a plurality of R ^p4 and R ^p5 , they may be the same or different.
np4 represents an integer from 0 to 5, and np5 represents an integer from 0 to 4. ]

np1 is preferably 0 or 1, more preferably 1. np2 is preferably 0 or 1, more preferably 0. np4 is preferably 0-2. np5 is preferably 0 to 2, more preferably 0.

R ^p1 , R ^p2 , R ^p4 and R ^p5 are preferably an alkyl group or a cycloalkyl group.

Examples of the group represented by formula (DA) include formulas (DA-1) to (DA-4), formula (DA-7), and formula (DA-8). ) or a group represented by formula (DA-10).

[In the formula, R ^D is a methyl group, an ethyl group, an isopropyl group, a tert-butyl group, a hexyl group, a 2-ethylhexyl group, a tert-octyl group, a cyclohexyl group, a methoxy group, a 2-ethylhexyloxy group, or a cyclohexyloxy group. represents a group. A plurality of ^RDs may be the same or different. ]

Examples of the group represented by formula (DB) include groups represented by formula (DB-1) or formula (DB-4).

[In the formula, ^RD represents the same meaning as above. ]

Examples of the group represented by formula (DC) include groups represented by formulas (DC-1) to (DC-13).

[In the formula, ^RD represents the same meaning as above. ]

R ^D is preferably a methyl group, an ethyl group, an isopropyl group, a tert-butyl group, a hexyl group, a 2-ethylhexyl group or a tert-octyl group, and more preferably a tert-butyl group.

Since the driving voltage of the light emitting element of this embodiment is further reduced, at least one of ring R ^1C and ring R ^2C may have an aryl group or a monovalent heterocyclic group as a substituent.

When at least one of ring R ^1C and ring R ^2C has an aryl group or a monovalent heterocyclic group, the total number of aryl groups and monovalent heterocyclic groups possessed by ring R ^1C and ring R ^2C is: The number is preferably 1 to 5, more preferably 1 to 3, and even more preferably 1 or 2.

Since the driving voltage of the light emitting element of this embodiment is further reduced, Y ^a is a group represented by -C(R ^Xa ) ₂ -, -C(R ^Xa )=C(R ^Xa )-, or a group represented by the formula (C '), more preferably a group represented by -C(R ^Xa ) ₂ - or a group represented by formula (C'), -C(R ^Xa ) A group represented by ₂ - is particularly preferred.

<Group represented by formula (C')>
Since the driving voltage of the light emitting element of this embodiment is further reduced, it is preferable that at least one of ring R ^3C and ring R ^4C is an aromatic hydrocarbon ring, and it is preferable that both of them are aromatic hydrocarbon rings. More preferred.

Examples and preferred ranges of aromatic hydrocarbon rings represented by ring R ^3C and ring R ^4C are examples and preferred ranges of aromatic hydrocarbon rings represented by ring R ^1C and ring R ^2C , respectively. Same as range.

In ring R ^3C and ring R ^4C , the number of carbon atoms in the aromatic heterocycle, not including the number of carbon atoms in substituents, is usually 2 to 60, preferably 3 to 30, more preferably, 4 to 15.

Examples of the aromatic heterocycle in ring R ^3C and ring R ^4C include a pyrrole ring, a diazole ring, a triazole ring, a furan ring, a thiophene ring, an oxadiazole ring, a thiadiazole ring, a pyridine ring, a diazabenzene ring, a triazine ring, and an aza ring. Naphthalene ring, diazanaphthalene ring, triazanaphthalene ring, azaanthracene ring, diazaanthracene ring, triazaanthracene ring, azaphenanthrene ring, diazaphenanthrene ring, triazaphenanthrene ring, dibenzofuran ring, dibenzothiophene ring, dibenzosilole ring, dibenzophosphole ring, carbazole ring, azacarbazole ring, diazacarbazole ring, phenoxazine ring, phenothiazine ring, dihydroacridine ring, and dihydrophenazine ring, preferably a pyridine ring, a diazabenzene ring, an azanaphthalene ring, A diazanaphthalene ring, an azaanthracene ring, a diazaphenanthrene ring, a dibenzofuran ring, a dibenzothiophene ring, a carbazole ring, a phenoxazine ring, a phenothiazine ring, a dihydroacridine ring, or a dihydrophenazine ring, more preferably a pyridine ring or a diazabenzene ring. , an azanaphthalene ring, a diazanaphthalene ring, a dibenzofuran ring, a dibenzothiophene ring, or a carbazole ring, and more preferably a pyridine ring or a diazabenzene ring, and these rings may have a substituent.

Examples and preferred ranges of substituents that ring R ^3C and ring R ^4C may have are the same as examples and preferred ranges of substituents that ring R ^1C and ring R ^2C may have.

Examples and preferred ranges of substituents that ring R ^3C and ring R ^4C may further include are substituents that ring R ^1C and ring R ^2C may have. Examples and preferred ranges of substituents that may be further included are the same.

When at least one of Ring R ^3C and Ring R ^4C has an aryl group or a monovalent heterocyclic group, the total number of aryl groups and monovalent heterocyclic groups that Ring R ^3C and Ring R ^4C have is: The number is preferably 1 to 5, more preferably 1 to 3, and even more preferably 1 or 2.

At least one of ring R ^1C , ring R ^2C , ring R ^3C and ring R ^4C may have an aryl group as a substituent.

A preferred embodiment of the compound represented by formula (C) is a compound in which ring R ^1C and ring R ^2C are aromatic hydrocarbon rings. The compound may be a compound in which ring R ^1C and ring R ^2C are benzene rings.
A preferred embodiment of the compound represented by formula (C) is a compound in which Y ^a is a group represented by -C(R ^Xa ) ₂ -, and ring R ^1C and ring R ^2C are aromatic hydrocarbon rings. It is. It may also be a compound in which Y ^a is a group represented by -C(R ^Xa ) ₂ -, and ring R ^1C and ring R ^2C are benzene rings.
Another preferred embodiment of the compound represented by formula (C) is that Y ^a is a group represented by formula (C'), and ring R ^1C , ring R ^2C , ring R ^3C and ring R ^4C are aromatic. It is a compound that is a group hydrocarbon ring. The compound may be a compound in which Y ^a is a group represented by formula (C'), and ring R ^1C , ring R ^2C , ring R ^3C and ring R ^4C are benzene rings.

The compound represented by formula (C) is a compound represented by formula (C'-2) or a compound represented by formula (C-2), since the driving voltage of the light emitting element of this embodiment is further reduced. is preferable, and a compound represented by formula (C-2) is more preferable.

<Compound represented by formula (C'-2) and compound represented by formula (C-2)>
E ^11C , E ^12C , E ^13C , E ^14C , E 21C , E ^22C , E ^23C , E ^24C , E ^31C , E ^32C , E ^{33C ,} E ^34C , E ^41C , E ^42C , E ^43C and E ^44C are carbon Preferably, it is an atom.

R ^11C , R ^12C , R ^13C , R ^14C , R ^21C , R ^22C , R ^23C and R ^24C are preferably a hydrogen atom, a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, or a cycloalkoxy group. , an aryl group, a monovalent heterocyclic group, or a substituted amino group, more preferably a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, a monovalent heterocyclic group, or a substituted amino group, still more preferably , a hydrogen atom, an alkyl group, an aryl group or a monovalent heterocyclic group, particularly preferably a hydrogen atom, an aryl group or a monovalent heterocyclic group, particularly preferably a hydrogen atom or an aryl group, These groups may further have a substituent.

At least one of R ^11C , R ^12C , R ^13C , R ^14C , R ^21C , R ^22C , R ^23C and R ^24C is preferably an aryl group, a monovalent heterocyclic group or a substituted amino group, It is more preferable that at least one is an aryl group or a monovalent heterocyclic group, and even more preferable that at least one is an aryl group, and these groups may further have a substituent.

In formula (C-2), when at least one of R ^11C , R ^12C , R ^13C , R ^14C , R ^21C , R ^22C , R ^23C and R ^24C has an aryl group or a monovalent heterocyclic group, At least one of R ^11C , R ^12C , R ^13C , R ^14C , R ^21C , R ^22C , R ^23C and R ^24C is preferably an aryl group or a monovalent heterocyclic group, and R ^11C , R ^12C , It is more preferable that at least one of R ^13C , R ^21C , R ^22C and R ^23C is an aryl group or a monovalent heterocyclic group, and R ^13C or R ^23C is an aryl group or a monovalent heterocyclic group. More preferably, R ^13C and R ^23C are an aryl group or a monovalent heterocyclic group.

In formula (C'-2), when at least one of R ^11C , R ^12C , R ^13C , R ^14C , R ^21C , R ^22C , R ^23C and R ^24C has an aryl group or a monovalent heterocyclic group; , R ^11C , R ^12C , R ^13C , R ^14C , R ^21C , R ^22C , R ^23C and R ^24C , at least one is preferably an aryl group or a monovalent heterocyclic group, and R ^11C , R ^12C , R ^21C and R ^22C , it is more preferable that at least one is an aryl group or a monovalent heterocyclic group, and it is even more preferable that R ^21C or R ^22C is an aryl group or a monovalent heterocyclic group.

R ^31C , R ^32C , R ^33C , R ^34C , R ^41C , R ^42C , R ^43C and R ^44C are preferably a hydrogen atom, a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group , an aryl group, a monovalent heterocyclic group, or a substituted amino group, more preferably a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, a monovalent heterocyclic group, or a substituted amino group, still more preferably , a hydrogen atom, an alkyl group, an aryl group or a monovalent heterocyclic group, particularly preferably a hydrogen atom, an aryl group or a monovalent heterocyclic group, particularly preferably a hydrogen atom or an aryl group, These groups may further have a substituent.

When at least one of R ^31C , R ^32C , R ^33C , R ^34C , R ^41C , R ^42C , R ^43C and R ^44C has an aryl group or a monovalent heterocyclic group, R ^31C , R ^32C , R ^33C , R ^34C , R ^41C , R ^42C , R ^43C and R ^44C , at least one is preferably an aryl group or a monovalent heterocyclic group, and R ^31C , R ^32C , R ^41C and R ^42C , It is more preferable that at least one is an aryl group or a monovalent heterocyclic group, and it is even more preferable that R ^31C or R ^32C is an aryl group or a monovalent heterocyclic group.

Aryl groups in R ^11C , R ^12C , R ^13C , R ^{14C , R 21C ,} R ^22C , R 23C , R ^{24C ,} R ^31C , R ^32C , R ^33C , R ^34C , R ^41C , R ^42C , R ^43C and R ^44C Examples and preferred ranges of the monovalent heterocyclic group and substituted amino group are the examples and preferred ranges of the aryl group, monovalent heterocyclic group, and substituted amino group in the substituent that R ^1H may have, respectively. is the same as

R ^11C , R ^12C , R ^13C , R ^{14C , R 21C} , R ^22C , R ^23C , R ^24C , R ^31C , R ^32C , R ^33C , ^{R 34C ,} R ^41C , R ^42C , R ^43C and R ^44C have Examples and preferred ranges of substituents that may be present are the same as those for R ^1H .

R ^11C and R ^12C , R ^12C and R ^13C , R ^13C and R ^14C , R ^14C and R ^34C , R ^34C and R ^33C , R ^33C and R ^32C , R ^32C and R ^31C , R ^31C and R ^41C , R ^41C and R ^42C , R ^42C and R ^43C , R ^43C and R ^44C , R ^44C and R ^24C , R ^24C and R ^23C , R ^23C and R ^22C , R ^22C and R ^21C , and R ^21C and R ^11C are respectively Although they may be bonded to form a ring together with the carbon atoms to which they are bonded, it is preferable that they do not form a ring.

Examples of the compound (A) include compounds represented by formulas (C-101) to (C-150). In these formulas, W represents a group represented by -O- or -S-, and when multiple Ws exist, they may be the same or different.

Among these, preferable compounds (A) include compounds represented by formula (C-109), formula (C-133) and formula (C-150). More preferred compounds (A) are compounds represented by formula (C-133) and formula (C-150).

<High molecular compound (B)>
The polymer compound (B) is a polymer compound containing a structural unit having a fused heterocyclic skeleton (b) containing in the ring one type of atom selected from a boron atom and a nitrogen atom that does not form a double bond. be. In the composition of this embodiment, it is preferable to use a polymer compound that exhibits an organic luminescent phenomenon as the polymer compound (B). In one preferred embodiment, the polymer compound (B) includes a fluorescent polymer. The polymer compound (B) may be a single type of polymer compound, or a combination of multiple types of polymer compounds may be used.

The number of carbon atoms in the fused heterocyclic skeleton (b), not including the number of carbon atoms in substituents, is usually 1 to 60, preferably 5 to 40, and more preferably 10 to 25.
The number of heteroatoms in the fused heterocyclic skeleton (b), excluding the number of heteroatoms of substituents, is usually 2 to 30, preferably 2 to 15, more preferably 2 to 10, and even more preferably is 2 to 5, particularly preferably 2 or 3.
The number of boron atoms in the fused heterocyclic skeleton (b), excluding the number of boron atoms in substituents, is usually 1 to 10, preferably 1 to 5, more preferably 1 to 3, and even more preferably is 1.
The number of nitrogen atoms not forming a double bond in the fused heterocyclic skeleton (b), excluding the number of nitrogen atoms of substituents, is usually 1 to 20, preferably 1 to 10, more preferably The number is from 1 to 5, more preferably from 1 to 3, particularly preferably from 1 to 2.
The fused heterocyclic skeleton (b) is preferably a 3- to 12-ring fused heterocyclic skeleton, more preferably a 3- to 6-cyclic fused heterocyclic skeleton, since the driving voltage of the light emitting device of this embodiment is further reduced. and more preferably a 3- or 5-ring condensed heterocyclic skeleton.

The fused heterocyclic skeleton (b) can also be referred to as a compound having a heterocyclic group (b') containing the fused heterocyclic skeleton (b).

The heterocyclic group (b') is an atom constituting a ring from a polycyclic heterocyclic compound containing in the ring one type of atom selected from a boron atom and a nitrogen atom that does not form a double bond. may be a group from which one or more hydrogen atoms directly bonded to are removed, and the group may have a substituent.

Examples of substituents that the heterocyclic group (b') may have include a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an aryl group, and a monovalent hetero A cyclic group or a substituted amino group is preferable, and an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, a monovalent heterocyclic group or a substituted amino group is more preferable, and an alkyl group, a cycloalkyl group, an aryl group, A monovalent heterocyclic group or a substituted amino group is more preferred, an alkyl group, a cycloalkyl group, or an aryl group is particularly preferred, and these groups may further have a substituent.

The aryl group in the substituent that the heterocyclic group (b') may have is preferably a monocyclic or bicyclic to hexacyclic aromatic hydrocarbon, and an atom that forms the ring. A group from which one directly bonded hydrogen atom has been removed, more preferably one hydrogen atom directly from a monocyclic, bicyclic, or tricyclic aromatic hydrocarbon. More preferably, it is a group obtained by removing one hydrogen atom directly bonded to an atom constituting a ring from benzene, naphthalene, anthracene, phenanthrene, or fluorene, and particularly preferably a phenyl group. The group may have a substituent.

The monovalent heterocyclic group in the substituent that the heterocyclic group (b') may have is preferably a monocyclic or bicyclic to hexacyclic heterocyclic compound. A group in which one hydrogen atom directly bonded to a constituent atom is removed, and more preferably a hydrogen atom directly bonded to a ring constituent atom from a monocyclic, bicyclic, or tricyclic heterocyclic compound. A group from which one atom has been removed, more preferably a hydrogen atom directly bonded to an atom constituting a ring from pyridine, diazabenzene, triazine, azanaphthalene, diazanaphthalene, carbazole, dibenzofuran, dibenzothiophene, phenoxazine or phenothiazine. A group in which one hydrogen atom is removed, particularly preferably a group in which one hydrogen atom directly bonded to an atom constituting the ring is removed from pyridine, diazabenzene or triazine, and these groups have a substituent. Good too.

In the substituted amino group as a substituent that the heterocyclic group (b') may have, the substituent that the amino group has is preferably an aryl group or a monovalent heterocyclic group, more preferably an aryl group; The group may further have a substituent. Examples and preferred ranges of the aryl group and the monovalent heterocyclic group in the substituent that the amino group has are the aryl group and the monovalent heterocyclic group in the substituent that the heterocyclic group (b') may have, respectively. The examples and preferred ranges of the groups are the same.

Examples of the substituents that the heterocyclic group (b') may have further include a halogen atom, a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, and an aryl group. An oxy group, an aryl group, a monovalent heterocyclic group, or a substituted amino group is preferable, an alkyl group, a cycloalkyl group, an aryl group, a monovalent heterocyclic group, or a substituted amino group is more preferable, and an alkyl group, a cycloalkyl group, or a substituted amino group is more preferable. An aryl group is more preferred, an alkyl group or a cycloalkyl group is particularly preferred, and these groups may further have a substituent, but preferably do not have a further substituent.
Examples and preferred ranges of the aryl group, the monovalent heterocyclic group, and the substituted amino group in the substituent that the heterocyclic group (b') may further include are as follows: The examples and preferred ranges of the aryl group, monovalent heterocyclic group, and substituted amino group in the substituent that the cyclic group (b') may have are the same.

A "nitrogen atom that does not form a double bond" means a nitrogen atom that is bonded to three other atoms through single bonds.
"Contains a nitrogen atom that does not form a double bond in the ring" means -N(-R ^N )- (wherein R ^N represents a hydrogen atom or a substituent) or the formula:

It means to include.

The polymer compound (B) is preferably a polymer compound containing a structural unit having a residue of a compound represented by formula (1), since the driving voltage of the light emitting element of this embodiment is further reduced.

<Polymer compound containing a structural unit having a residue of a compound represented by formula (1)>
Ring A, Ring B, and Ring C are preferably monocyclic or bicyclic to hexacyclic aromatic hydrocarbons, or monocyclic, since the driving voltage of the light emitting device of this embodiment is further reduced. or a group obtained by removing one or more hydrogen atoms directly bonded to the atoms constituting the ring from a bicyclic to hexacyclic heterocyclic compound, more preferably a monocyclic, bicyclic, or tricyclic compound. A group obtained by removing one or more hydrogen atoms directly bonded to an atom constituting a ring from an aromatic hydrocarbon of the formula or a monocyclic, bicyclic, or tricyclic heterocyclic compound, and more preferably is a group obtained by removing one or more hydrogen atoms directly bonded to the atoms constituting the ring from a monocyclic aromatic hydrocarbon or a monocyclic heterocyclic compound, and is particularly preferably benzene, pyridine or A group obtained by removing one or more hydrogen atoms directly bonded to an atom constituting a ring from diazabenzene, and particularly preferably a group obtained by removing one or more hydrogen atoms directly bonded to an atom constituting a ring from benzene. These groups may have a substituent.
Examples and preferred ranges of substituents that ring A, ring B, and ring C may have are the same as examples and preferred ranges of substituents that heterocyclic group (b') may have.

When X is a boron atom, Y ¹ , Y ² and Y ³ are preferably represented by an oxygen atom, a sulfur atom, or -N(Ry)-, since the driving voltage of the light emitting element of this embodiment is further reduced. or an alkylene group, more preferably an oxygen atom, a sulfur atom, or a group represented by -N(Ry)-, still more preferably a group represented by -N(Ry)-, These groups may have a substituent.

When X is a boron atom, n2 is preferably 1 because the driving voltage of the light emitting element of this embodiment is further reduced.

When X is a boron atom, n3 is preferably 0 because the driving voltage of the light emitting element of this embodiment is further reduced.

When X is a nitrogen atom, Y ¹ , Y ² and Y ³ are preferably a single bond, an oxygen atom, a sulfur atom, -N(Ry)-, since the driving voltage of the light emitting element of this embodiment is further reduced. or an alkylene group, more preferably a single bond, an oxygen atom, or a group represented by -N(Ry)-, still more preferably a group represented by an oxygen atom, and these The group may have a substituent.

When X is a nitrogen atom, n2 is preferably 0 because the driving voltage of the light emitting element of this embodiment is further reduced.

When X is a nitrogen atom, n3 is preferably 0 because the driving voltage of the light emitting element of this embodiment is further reduced.

Examples and preferred ranges of the substituents that Y ¹ , Y ² and Y ³ may have are the same as the examples and preferred ranges of the substituents that the heterocyclic group (b') may have.

Ry is preferably an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, more preferably an aryl group or a monovalent heterocyclic group, still more preferably an aryl group, and these The group may have a substituent.
The examples and preferred ranges of the aryl group and monovalent heterocyclic group in Ry are the examples and preferred ranges of the aryl group and monovalent heterocyclic group in the substituent that the heterocyclic group (b') may have, respectively. Same as range.
The examples and preferred ranges of the substituents that Ry may have are the same as the examples and preferred ranges of the substituents that the heterocyclic group (b') may have.

Examples of the structural unit having a residue of the compound represented by formula (1) include the structural unit represented by the following formula. In these formulas, ^RTS is a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, a monovalent heterocyclic group, or a substituted amino group, and these groups may further have a substituent. A plurality of ^RTSs may be the same or different.

Examples and preferred ranges of the aryl group and monovalent heterocyclic group in R ^TS are respectively the same as the examples and preferred ranges of the aryl group and monovalent heterocyclic group in R ^1H described above.
In the substituted amino group in R ^TS , the substituent that the amino group has is preferably an aryl group or a monovalent heterocyclic group, more preferably an aryl group, and these groups may further have a substituent. Examples and preferred ranges of the aryl group that is a substituent on the amino group are the same as the example and preferred range of the aryl group in R ^1H . Examples and preferred ranges of the monovalent heterocyclic group that is a substituent on the amino group are the same as the examples and preferred range of the monovalent heterocyclic group in R ^1H .
The examples and preferred ranges of substituents that R ^TS may have are the examples and preferred ranges of substituents that the group represented by Ar ^Y1 (described below) may further have. It's the same.

When the polymer compound (B) includes a structural unit having a residue of a compound represented by formula (1), the structural unit having a residue of a compound represented by formula (1) is Since the driving voltage of the light-emitting element is further reduced, it is preferably 0.05 to 0.05 to 90 mol%, more preferably 0.1 to 70 mol%, still more preferably 0.2 to 50 mol%, particularly preferably 0.5 to 30 mol%, particularly preferably 0. It is 5 to 10 mol%.

When the polymer compound (B) contains a structural unit having a residue of a compound represented by formula (1), in the polymer compound containing a structural unit having a residue of a compound represented by formula (1), , only one type of structural unit having a residue of the compound represented by formula (1) may be included, or two or more types may be included.

When the polymer compound (B) contains a structural unit having a residue of a compound represented by formula (1), the polymer compound containing a structural unit having a residue of a compound represented by formula (1) , since the driving voltage of the light emitting element of this embodiment is further reduced, the structural unit represented by formula (Y) described below (different from the structural unit having a residue of the compound represented by formula (1)) .) is preferably included. Furthermore, since a polymer compound containing a structural unit having a residue of a compound represented by formula (1) has excellent hole transport properties, it may further contain a structural unit represented by formula (X) described below. is preferred.

[Constituent unit represented by formula (Y)]
The arylene group represented by Ar ^Y1 is preferably a formula (A-1), a formula (A-6), a formula (A-7), a formula (A-9) to a formula (A-11), or a formula (A-1). -13) or formula (A-19), more preferably a group represented by formula (A-1), formula (A-7), formula (A-9) or formula (A-19). These groups may have a substituent.

The divalent heterocyclic group represented by Ar ^Y1 is preferably a formula (AA-4), a formula (AA-10), a formula (AA-13), a formula (AA-15), or a formula (AA-18). or a group represented by formula (AA-20), more preferably a group represented by formula (AA-4), formula (AA-10), formula (AA-18) or formula (AA-20) and these groups may have a substituent.

Preferred ranges and more preferred ranges of the arylene group and divalent heterocyclic group in the divalent group represented by Ar ^Y1 in which at least one arylene group and at least one divalent heterocyclic group are directly bonded are the same as the preferable ranges and more preferable ranges of the arylene group and divalent heterocyclic group represented by Ar ^Y1 described above, respectively.

The divalent group in which at least one arylene group represented by Ar ^Y1 and at least one divalent heterocyclic group are directly bonded includes at least ^one group represented by Ar ^X2 and Ar Examples include those similar to divalent groups in which one type of arylene group and at least one type of divalent heterocyclic group are directly bonded.

The substituent that the group represented by Ar ^Y1 may have is preferably an alkyl group, a cycloalkyl group, or an aryl group, and these groups may further have a substituent.

Examples of the structural unit represented by formula (Y) include structural units represented by formulas (Y-1) to (Y-10), and from the viewpoint of the driving voltage of the light emitting element of this embodiment, , preferably structural units represented by formulas (Y-1) to (Y-3), and from the viewpoint of electron transport properties, preferably represented by formulas (Y-4) to (Y-7) It is a structural unit, and from the viewpoint of hole transport properties, it is preferably a structural unit represented by formulas (Y-8) to (Y-10).

[In the formula, R ^Y1 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. . A plurality of R ^Y1s may be the same or different, and adjacent R ^Y1s may be bonded to each other to form a ring with the carbon atoms to which they are bonded. ]

R ^Y1 is preferably a hydrogen atom, an alkyl group, a cycloalkyl group, or an aryl group, and these groups may have a substituent.

The structural unit represented by formula (Y-1) is preferably a structural unit represented by formula (Y-1').

[In the formula, R ^Y11 represents an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. A plurality of R ^Y11 's may be the same or different. ]

R ^Y11 is preferably an alkyl group, a cycloalkyl group, or an aryl group, more preferably an alkyl group or a cycloalkyl group, and these groups may have a substituent.

[In the formula,
R ^Y1 represents the same meaning as above.
X ^Y1 represents a group represented by -C(R ^Y2 ) ₂ -, -C(R ^Y2 )=C(R ^Y2 )-, or C(R ^Y2 ) ₂ -C(R ^Y2 ) ₂ -. R ^Y2 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. A plurality of R ^Y2s may be the same or different, and R ^Y2s may be bonded to each other to form a ring with the carbon atoms to which they are bonded. ]

R ^Y2 is preferably an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, more preferably an alkyl group, a cycloalkyl group, or an aryl group, and these groups have a substituent. It's okay.

In X ^Y1 , the combination of two R ^Y2s in the group represented by -C(R ^Y2 ) ₂ - is preferably such that both are alkyl groups or cycloalkyl groups, both are aryl groups, and both are monovalent hetero cyclic group, or one is an alkyl group or cycloalkyl group and the other is an aryl group or a monovalent heterocyclic group, more preferably one is an alkyl group or cycloalkyl group and the other is an aryl group, and these groups may have a substituent. Two R ^Y2s may be bonded to each other to form a ring with the atoms to which they are bonded, and when R ^Y2 forms a ring, as a group represented by -C(R ^Y2 ) ₂ - is preferably a group represented by formulas (Y-A1) to (Y-A5), more preferably a group represented by formula (Y-A4), and these groups have a substituent. You can leave it there.

In X ^Y1 , the combination of two R ^Y2s in the group represented by -C(R ^Y2 )=C(R ^Y2 )- is preferably such that both are an alkyl group or a cycloalkyl group, or one is an alkyl group. Alternatively, one is a cycloalkyl group and the other is an aryl group, and these groups may have a substituent.

In X ^Y1 , four R ^Y2s in the group represented by -C(R ^Y2 ) ₂ -C(R ^Y2 ) ₂ - are preferably an alkyl group or a cycloalkyl group which may have a substituent. It is. A plurality of R ^Y2 may be bonded to each other to form a ring with each bonding atom, and when R ^Y2 forms a ring, -C(R ^Y2 ) ₂ -C(R ^Y2 ) ₂ - The group represented is preferably a group represented by formulas (Y-B1) to (Y-B5), more preferably a group represented by formula (Y-B3), and these groups are substituted. It may have a group.

[In the formula, R ^Y2 represents the same meaning as above. ]

The structural unit represented by formula (Y-2) is preferably a structural unit represented by formula (Y-2').

[In the formula, R ^Y1 and X ^Y1 represent the same meanings as above. ]

[In the formula, R ^Y1 and X ^Y1 represent the same meanings as above. ]

The structural unit represented by formula (Y-3) is preferably a structural unit represented by formula (Y-3').

[In the formula, R ^Y11 and X ^Y1 represent the same meanings as above. ]

[In the formula,
R ^Y1 represents the same meaning as above.
R ^Y3 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. ]

R ^Y3 is preferably an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocyclic group, more preferably an aryl group, and these groups have a substituent. It's okay.

The structural unit represented by formula (Y-4) is preferably a structural unit represented by formula (Y-4'), and the structural unit represented by formula (Y-6) is preferably a structural unit represented by formula (Y-4'). -6') is preferable.

[In the formula, R ^Y1 and R ^Y3 represent the same meanings as above. ]

Examples of the structural unit represented by formula (Y) include structural units consisting of arylene groups represented by formulas (Y-101) to (Y-141), and formulas (Y-201) to (Y-202). A structural unit consisting of a divalent heterocyclic group represented by (); at least one arylene group represented by formulas (Y-301) to (Y-306); A structural unit consisting of a divalent group to which is directly bonded can be mentioned.

The content of the structural unit represented by formula (Y) in which Ar ^Y1 is an arylene group is determined by It is preferably 0.5 to 99 mol%, more preferably 10 to 95 mol%, based on the total amount of structural units contained in the polymer compound containing the structural unit having a residue of a compound.

A structural unit represented by formula (Y), in which Ar ^Y1 is a divalent heterocyclic group, or a divalent heterocyclic group in which at least one arylene group and at least one divalent heterocyclic group are directly bonded. Since the driving voltage of the light emitting element of this embodiment is further reduced, the content of the structural unit which is a group of is contained in the polymer compound containing the structural unit having a residue of the compound represented by formula (1). It is preferably 0.5 to 30 mol%, more preferably 3 to 20 mol%, based on the total amount of structural units.

In a polymer compound containing a structural unit having a residue of a compound represented by formula (1), only one type of structural unit represented by formula (Y) may be included, or two or more types may be included. You can leave it there.

[Constituent unit represented by formula (X)]
a ^X1 is preferably 2 or less, more preferably 1, since the driving voltage of the light emitting element of this embodiment is further reduced.

a ^X2 is preferably 2 or less, more preferably 0, since the driving voltage of the light emitting element of this embodiment is further reduced.

R ^X1 , R ^X2 and R ^X3 are preferably an alkyl group, a cycloalkyl group, an aryl group or a monovalent heterocyclic group, more preferably an aryl group, and these groups have a substituent Good too.

The arylene group represented by Ar ^X1 and Ar ^X3 is preferably a group represented by formula (A-1) or formula (A-9), more preferably a group represented by formula (A-1). and these groups may have a substituent.

The divalent heterocyclic group represented by Ar ^X1 and Ar ^X3 is preferably represented by formula (AA-1), formula (AA-2) or formula (AA-7) to formula (AA-26). These groups may have a substituent.

Ar ^X1 and Ar ^X3 are preferably arylene groups which may have substituents.

The arylene group represented by Ar ^X2 and ^Ar A group represented by formula (A-19), and these groups may have a substituent.

The preferred range of the divalent heterocyclic group represented by Ar ^X2 and Ar ^X4 is the same as the preferred range of the divalent heterocyclic group represented by Ar ^X1 and Ar ^X3 .

Preferred ranges of the arylene group and the divalent heterocyclic group in the divalent group represented by Ar ^X2 and Ar ^X4 in which at least one arylene group and at least one divalent heterocyclic group are directly bonded; The more preferable range is the same as the preferable range and the more preferable range of the arylene group and divalent heterocyclic group represented by Ar ^X1 and Ar ^X3 , respectively.

Examples of the divalent group represented by Ar ^X2 and Ar ^X4 in which at least one arylene group and at least one divalent heterocyclic group are directly bonded include a group represented by the following formula: , these groups may have a substituent.

[In the formula, R ^XX represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. ]

R ^XX is preferably an alkyl group, a cycloalkyl group, or an aryl group, and these groups may have a substituent.

Ar ^X2 and Ar ^X4 are preferably arylene groups which may have substituents.

^The substituents that the groups represented by Ar ^X1 to Ar ^X4 and R ^X1 to R You may do so.

The structural units represented by formula (X) are preferably structural units represented by formulas (X-1) to (X-7), and more preferably structural units represented by formulas (X-3) to (X-7). ), more preferably structural units represented by formulas (X-3) to (X-6).

[In the formula, R ^X4 and ^R represents a group, and these groups may have a substituent. A plurality of R ^X4 's may be the same or different. A plurality of R ^X5s may be the same or different, and adjacent R ^X5s may be bonded to each other to form a ring with the carbon atom to which they are bonded. ]

Examples of the structural unit represented by formula (X) include structural units represented by formulas (X1-1) to (X1-23), preferably formulas (X1-6) to (X1-14). ).

The content of the structural unit represented by formula (X) is determined by the content of the structural unit containing the structural unit having a residue of the compound represented by formula (1), since the hole transport property of the light emitting element of this embodiment is more excellent. The amount is preferably 0.1 to 50 mol%, more preferably 1 to 40 mol%, and still more preferably 5 to 30 mol%, based on the total amount of structural units contained in the molecular compound.

In a polymer compound containing a structural unit having a residue of a compound represented by formula (1), only one type of structural unit represented by formula (X) may be included, or two or more types may be included. You can leave it there.

[Examples of polymer compounds, etc.]
Examples of the polymer compound (B) include polymer compounds (P-1) to (P-8). Here, "other" structural units refer to structural units having a residue of a compound represented by formula (1), structural units represented by formula (Y), and structural units represented by formula (X). means a constituent unit other than

[In the table, p, q, r, s and t indicate the molar ratio of each structural unit. p+q+r+s+t=100, and 100≧p+q+r+s≧70. ]

When the polymer compound (B) contains a structural unit having a residue of a compound represented by formula (1), the polymer compound containing a structural unit having a residue of a compound represented by formula (1) , a block copolymer, a random copolymer, an alternating copolymer, a graft copolymer, or other embodiments, but a copolymer is preferable.

When the polymer compound (B) contains a structural unit having a residue of a compound represented by formula (1), the polymer compound (B) contains a structural unit having a residue of a compound represented by formula (1). The number average molecular weight in terms of polystyrene is preferably 5×10 ³ to 1×10 ⁶ , more preferably 1×10 ⁴ to 5×10 ⁵ , even more preferably 3×10 ⁴ to 1.5×10 ⁵ . be.

[Production method]
When the polymer compound (B) contains a structural unit having a residue of a compound represented by formula (1), the polymer compound containing a structural unit having a residue of a compound represented by formula (1) , for example, Chemical Review (Chem.Rev.), Vol. 109, pp. 897-1091 (2009), International Publication No. 1998/011150, International Publication No. 2013/191088, Japanese Patent Application Publication No. 2012-036388, It can be produced using known polymerization methods described in JP-A No. 2014-148663, JP-A No. 2010-196040, JP-A No. 2010-260879, etc. In other words, for example, Suzuki reaction, Yamamoto reaction , Buchwald reaction, Stille reaction, Negishi reaction, Kumada reaction, and other coupling reactions using transition metal catalysts.

In the above polymerization method, the monomers can be charged in one go by charging the entire amount of the monomers into the reaction system at once, or by charging a part of the monomers and reacting them, and then adding the remaining monomers all at once. Examples include a method of continuously or dividedly charging a monomer, a method of continuously or dividingly charging a monomer, and the like.

Examples of transition metal catalysts include palladium catalysts and nickel catalysts.

Post-treatment of the polymerization reaction can be carried out by known methods, such as removing water-soluble impurities by liquid separation, adding the reaction solution after the polymerization reaction to a lower alcohol such as methanol, filtering the precipitate, and then drying. Use these methods alone or in combination. When the purity of the polymer compound (B) is low, it can be purified by conventional methods such as recrystallization, reprecipitation, continuous extraction using a Soxhlet extractor, and column chromatography.

<Composition of this embodiment>
In the composition of this embodiment, the compound (A) and the polymer compound (B) preferably interact physically, chemically, or electrically. This interaction allows, for example, to improve or adjust the luminescent properties, charge transport properties, or charge injection properties of the composition of the present embodiment.
In the composition of the present embodiment, to explain the luminescent material as an example, the above-mentioned interaction between the compound (A) and the polymer compound (B) results in the luminescent properties, charge transport properties, or charge injection properties. As a result, the polymer compound (B) can emit light more efficiently, and the driving voltage of the light emitting element of this embodiment is further reduced.

From the above viewpoint, in the composition of the present embodiment, it is preferable to use a compound that does not exhibit an organic luminescence phenomenon as the compound (A). Furthermore, from the above viewpoint, in the composition of the present embodiment, it is preferable to use a polymer compound that exhibits an organic luminescence phenomenon as the polymer compound (B).

Examples of the composition of the present embodiment include a composition of a polymer compound containing a structural unit having a residue of a compound represented by formula (1) and a compound represented by formula (FH).

The composition of this embodiment includes a composition of a polymer compound containing a structural unit having a residue of a compound represented by formula (1) and a compound represented by formula (C), and a composition of a compound represented by formula (C), A composition of a polymer compound containing a structural unit having a residue of the compound represented by the formula (C) and a compound represented by the formula (C) in which ring R ^1C and ring R ^2C are benzene rings, ) and a compound represented by formula (C), in which Y ^a is a group represented by -C(R ^Xa ) ₂ -, and a composition with a compound in which ring R ^1C and ring R ^2C are benzene rings, and a composition with a polymer compound containing a structural unit having a residue of a compound represented by formula (1) and a composition represented by formula (C). with a compound in which Y ^a is a group represented by formula (C'), and ring R ^1C , ring R ^2C , ring R ^3C and ring R ^4C are aromatic hydrocarbon rings. compositions.

Further, the composition of the present embodiment includes a composition of a polymer compound containing a structural unit having a residue of a compound represented by formula (1) and a compound represented by formula (C-2), a composition of a compound represented by formula (C-2), A composition of a polymer compound containing a structural unit having a residue of a compound represented by (1) and a compound represented by formula (C-2'), a residue of a compound represented by formula (1) and a compound represented by formula (C-2), in which E ^11C , E ^12C , E ^13C , E ^14C , E ^21C , E ^22C , E ^23C and E ^24C are carbon atoms. A composition with a compound represented by E ^11C , and a polymer compound containing a structural unit having a residue of a compound represented by formula (1) and a compound represented by formula (C-2′), Compounds in which E ^12C , E ^13C , E ^14C , E ^21C , E ^22C , E ^23C , E 24C , E ^31C , E ^32C , E ^33C , E ^{34C ,} E ^41C , E ^42C , E ^43C and E ^44C are carbon atoms Examples include compositions with.

<Content of each component, etc.>
In the composition of the present embodiment, the content of the compound (A) is usually 0.01 to 150 parts by mass, preferably 0.1 to 150 parts by mass, based on 100 parts by mass of the polymer compound (B). The amount is 90 parts by weight, more preferably 0.5 to 70 parts by weight, even more preferably 5 to 60 parts by weight, particularly preferably 10 to 50 parts by weight.

In the composition of this embodiment, each of the compound (A) and the polymer compound (B) may be used alone or in combination of two or more.

<Others>
The composition of this embodiment may further contain at least one selected from the group consisting of a hole transport material, a hole injection material, an electron transport material, an electron injection material, a luminescent material, and an antioxidant. good. However, the luminescent material, hole transport material, hole injection material, electron transport material, and electron injection material are different from the compound (A) and the polymer compound (B).

The composition of this embodiment may further contain a solvent.
A composition containing a compound (A), a polymer compound (B), and a solvent (hereinafter sometimes referred to as "ink") can be prepared using a printing method such as an inkjet printing method or a nozzle printing method. Suitable for producing light emitting devices.

The viscosity of the ink can be adjusted depending on the type of printing method, but when applied to printing methods such as inkjet printing in which the solution passes through a discharge device, it is necessary to adjust the viscosity of the ink to prevent clogging and deflection during discharge. , preferably 1 to 20 mPa·s at 25°C.

The solvent contained in the ink is preferably a solvent that can dissolve or uniformly disperse the solid content in the ink. Examples of solvents include chlorinated solvents such as 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene, and o-dichlorobenzene; ether solvents such as tetrahydrofuran, dioxane, anisole, and 4-methylanisole; toluene, Aromatic hydrocarbon solvents such as xylene, mesitylene, ethylbenzene, n-hexylbenzene, cyclohexylbenzene; cyclohexane, methylcyclohexane, n-pentane, n-hexane, n-heptane, n-octane, n-nonane, n- Aliphatic hydrocarbon solvents such as decane, n-dodecane, and bicyclohexyl; Ketone solvents such as acetone, methyl ethyl ketone, cyclohexanone, and acetophenone; and esters such as ethyl acetate, butyl acetate, ethyl cellosolve acetate, methyl benzoate, and phenyl acetate. Solvents: Polyhydric alcohol solvents such as ethylene glycol, glycerin, and 1,2-hexanediol; Alcohol solvents such as isopropyl alcohol and cyclohexanol; Sulfoxide solvents such as dimethyl sulfoxide; N-methyl-2-pyrrolidone, N , N-dimethylformamide and other amide solvents.

In the ink, the blending amount of the solvent is usually 1,000 to 100,000 parts by mass, preferably 2,000 to 20,000 parts by mass, when the total of compound (A) and polymer compound (B) is 100 parts by mass. be.

The solvents may be used alone or in combination of two or more.

[Hole transport material]
Hole transport materials are classified into low molecular weight compounds and high molecular weight compounds, with high molecular weight compounds being preferred, and high molecular weight compounds having a crosslinking group being more preferred.

Examples of the polymer compound include polyvinylcarbazole and derivatives thereof; polyarylene having an aromatic amine structure in the side chain or main chain and derivatives thereof. The polymer compound may be a compound to which an electron-accepting site is bonded. Examples of the electron-accepting site include fullerene, tetrafluorotetracyanoquinodimethane, tetracyanoethylene, and trinitrofluorenone, with fullerene being preferred.

When the composition of the present embodiment contains a hole transport material, the amount of the hole transport material is usually 0 when the total of the compound (A) and the polymer compound (B) is 100 parts by mass. .1 to 1000 parts by weight, preferably 1 to 400 parts by weight, and more preferably 5 to 150 parts by weight.

In the composition of this embodiment, the hole transport materials may be used alone or in combination of two or more.

[Electron transport material]
Electron transport materials are classified into low molecular compounds and high molecular compounds. The electron transport material may have a crosslinking group.

Examples of low-molecular compounds include metal complexes having 8-hydroxyquinoline as a ligand, oxadiazole, anthraquinodimethane, benzoquinone, naphthoquinone, anthraquinone, tetracyanoanthraquinodimethane, fluorenone, diphenyldicyanoethylene, and , diphenoquinone, and derivatives thereof.

Examples of the polymer compound include polyphenylene, polyfluorene, and derivatives thereof. The polymer compound may be doped with metal.

When the composition of the present embodiment contains an electron transport material, the amount of the electron transport material is usually 0.1 parts when the total of the compound (A) and the polymer compound (B) is 100 parts by mass. The amount is from 1 to 1000 parts by weight, preferably from 1 to 400 parts by weight, and more preferably from 5 to 150 parts by weight.

In the composition of this embodiment, the electron transport materials may be used alone or in combination of two or more.

[Hole injection material and electron injection material]
Hole-injecting materials and electron-injecting materials are classified into low-molecular compounds and high-molecular compounds, respectively. The hole injection material and the electron injection material may have a crosslinking group.

Examples of low-molecular compounds include metal phthalocyanines such as copper phthalocyanine; carbon; metal oxides such as molybdenum and tungsten; and metal fluorides such as lithium fluoride, sodium fluoride, cesium fluoride, and potassium fluoride.

Examples of polymer compounds include polyaniline, polythiophene, polypyrrole, polyphenylene vinylene, polythienylene vinylene, polyquinoline, polyquinoxaline, and derivatives thereof; polymers containing an aromatic amine structure in the main chain or side chain, etc. conductive polymers.

When the composition of this embodiment contains a hole injection material or an electron injection material, the amount of the hole injection material and the electron injection material is the sum of the compound (A) and the polymer compound (B), respectively. When 100 parts by weight is used, it is usually 0.1 to 1000 parts by weight, preferably 1 to 400 parts by weight, and more preferably 5 to 150 parts by weight.

In the composition of this embodiment, each of the hole injection material and electron injection material may be used alone or in combination of two or more.

[Ion dope]
When the hole injection material or electron injection material contains a conductive polymer, the electrical conductivity of the conductive polymer is preferably 1×10 ⁻⁵ S/cm to 1×10 ³ S/cm. In order to keep the electrical conductivity of the conductive polymer within this range, the conductive polymer can be doped with an appropriate amount of ions.

The type of ion to be doped is an anion if it is a hole injection material, and a cation if it is an electron injection material. Examples of the anion include polystyrene sulfonate ion, alkylbenzene sulfonate ion, and camphor sulfonate ion. Examples of the cation include lithium ion, sodium ion, potassium ion, and tetrabutylammonium ion.

The number of ions to be doped may be one type or two or more types.

[Light-emitting material]
Luminescent materials are classified into low molecular compounds and high molecular compounds. The luminescent material may have a crosslinking group.

Examples of the low-molecular compound include naphthalene and its derivatives, anthracene and its derivatives, perylene and its derivatives, and triplet luminescent complexes having iridium, platinum, or europium as the central metal.

Examples of the polymer compound include a phenylene group, a naphthalenediyl group, a fluorenediyl group, a phenanthrenediyl group, a dihydrophenanthrenediyl group, a group represented by formula (X), a carbazolediyl group, a phenoxazinediyl group, and a phenothiazinediyl group. Examples include polymeric compounds containing anthracenediyl group, anthracenediyl group, pyrenediyl group, and the like.

The luminescent material may include a low-molecular compound and a high-molecular compound, preferably a triplet luminescent complex and a high-molecular compound.

As the triplet emitting complex, iridium complexes, which are metal complexes represented by formulas Ir-1 to Ir-5, are preferred.

[In the formula,
R ^D1 to R ^D8 , R ^D11 to R ^D20 , R ^D21 to R ^D26 and R ^D31 to R ^D37 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryl It represents an oxy group, a monovalent heterocyclic group, or a halogen atom, and these groups may have a substituent. When a plurality of R ^D1 to R ^D8 , R ^D11 to R ^D20 , R ^D21 to R ^D26 and R ^D31 to R ^D37 are present, they may be the same or different.
-A ^D1 ---A ^D2 - represents an anionic bidentate ligand, and A ^D1 and A ^D2 each independently represent a carbon atom, oxygen atom, or nitrogen atom bonded to an iridium atom; The atoms may be atoms constituting a ring. When a plurality of -A ^D1 ---A ^D2 - exist, they may be the same or different.
n _D1 represents 1, 2 or 3, and n _D2 represents 1 or 2. ]

In the metal complex represented by formula Ir-1, at least one of R ^D1 to R ^D8 is preferably a group represented by formula (DD).

In the metal complex represented by formula Ir-2, at least one of R ^D11 to R ^D20 is preferably a group represented by formula (DD).

In the metal complex represented by formula Ir-3, at least one of R ^D1 to R ^D8 and R ^D11 to R ^D20 is preferably a group represented by formula (DD).

In the metal complex represented by formula Ir-4, at least one of R ²¹ to R ^D26 is preferably a group represented by formula (DD).

In the metal complex represented by formula Ir-5, at least one of R ^D31 to R ^D37 is preferably a group represented by formula (DD).

[In the formula,
m ^DB1 , m ^DB2 and m ^DB3 each independently represent an integer of 0 or more.
G ^DB represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups may have a substituent.
Ar ^DB1 , Ar ^DB2 and Ar ^DB3 each independently represent an arylene group or a divalent heterocyclic group, and these groups may have a substituent. When there are a plurality of Ar ^DB1 , Ar ^DB2, and Ar ^DB3 , they may be the same or different.
T ^DB represents an aryl group or a monovalent heterocyclic group, and these groups may have a substituent. A plurality of T ^DBs may be the same or different. ]

m ^DB1 , m ^DB2 and m ^DB3 are usually integers of 10 or less, preferably 5 or less, and more preferably 0 or 1. It is preferable that m ^DB1 , m ^DB2 and m ^DB3 are the same integer.

G ^DB is preferably a group represented by formulas (GDB-11) to (GDB-15), and these groups may have a substituent.

[In the formula,
*, ** and *** represent bonds with Ar ^DB1 , Ar ^DB2 and Ar ^DB3 , respectively.
R ^DE represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocyclic group, and these groups may further have a substituent. When there are multiple R ^DEs , they may be the same or different. ]

R ^DE is preferably a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, or a cycloalkoxy group, more preferably a hydrogen atom, an alkyl group, or a cycloalkyl group, and these groups have a substituent. It's okay.

Ar ^DB1 , Ar ^DB2 and Ar ^DB3 are preferably groups represented by formulas (ArDB-1) to (ArDB-3).

[In the formula,
R ^DE represents the same meaning as above.
R ^DF represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. When there are multiple R ^DFs , they may be the same or different. ]

T ^DB is preferably a group represented by formulas (TDB-1) to (TDB-3).

[In the formula, R ^DE and R ^DF have the same meanings as above. ]

The group represented by formula (DD) is preferably a group represented by formulas (DD1) to (DD3).

[In the formula,
R ^q1 , R ^q2 and R ^q3 each independently represent an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group or a halogen atom. When there is a plurality of R ^q1 and R ^q2 , they may be the same or different.
nq1 represents an integer from 0 to 5, nq2 represents an integer from 0 to 3, and nq3 represents 0 or 1. A plurality of nq1s may be the same or different. ]

nq1 is preferably an integer of 0 to 3, more preferably an integer of 1 to 3, and still more preferably 1. nq2 is preferably 0 or 1, more preferably 0. nq3 is preferably 0.

R ^q1 , R ^q2 and R ^q3 are preferably alkyl groups or cycloalkyl groups.

Examples of the anionic bidentate ligand represented by -A ^D1 ---A ^D2 - include a ligand represented by the following formula.

[In the formula, * represents a site that binds to Ir. ]

The metal complex represented by formula Ir-1 is preferably a metal complex represented by formulas Ir-11 to Ir-13. The metal complex represented by formula Ir-2 is preferably a metal complex represented by formula Ir-21. The metal complex represented by formula Ir-3 is preferably a metal complex represented by formulas Ir-31 to Ir-33. The metal complex represented by formula Ir-4 is preferably a metal complex represented by formulas Ir-41 to Ir-43. The metal complex represented by formula Ir-5 is preferably a metal complex represented by formulas Ir-51 to Ir-53.

[In the formula,
n _D2 represents 1 or 2.
D represents a group represented by formula (DD). A plurality of D's may be the same or different.
R ^DC represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. A plurality of R ^DCs may be the same or different.
R ^DD represents an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. A plurality of R ^DDs may be the same or different. ]

Examples of triplet luminescent complexes include the following metal complexes.

When the composition of the present embodiment contains a luminescent material, the content of the luminescent material is usually 0.1 to 1000 parts by mass when the total of the compound (A) and the polymer compound (B) is 100 parts by mass. parts, preferably 0.1 to 400 parts by mass.

The luminescent materials may be used alone or in combination of two or more.

[Antioxidant]
The antioxidant may be any compound that is soluble in the same solvent as the polymer compound of this embodiment and does not inhibit luminescence and charge transport, such as phenolic antioxidants and phosphorus antioxidants. .

When the composition of the present embodiment contains an antioxidant, the amount of the antioxidant is usually 0.001 parts when the total of the compound (A) and the polymer compound (B) is 100 parts by mass. ~10 parts by mass.

The antioxidants may be used alone or in combination of two or more.

<Membrane>
The composition of this embodiment is suitably used for manufacturing a membrane. The membrane contains the composition of this embodiment.

The film is suitable as a light emitting layer in a light emitting device.

The film can be formed using ink, such as spin coating, casting, microgravure coating, gravure coating, bar coating, roll coating, wire bar coating, dip coating, spray coating, and screen printing. , a flexographic printing method, an offset printing method, an inkjet printing method, a capillary coating method, and a nozzle coating method.

The thickness of the film is typically 1 nm to 10 μm.

<Light emitting element>
The light emitting element of this embodiment is a light emitting element containing the composition of this embodiment.
The light emitting element of this embodiment has, for example, an electrode consisting of an anode and a cathode, and a layer containing the composition of this embodiment provided between the electrodes.

[Layer structure]
The layer containing the composition of the present embodiment is usually one or more of a light emitting layer, a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer, and is preferably a light emitting layer. . These layers each include a luminescent material, a hole transport material, a hole injection material, an electron transport material, and an electron injection material. These layers were prepared in the same way as the film described above, by dissolving a luminescent material, a hole transporting material, a hole injection material, an electron transporting material, and an electron injection material in the above-mentioned solvents and preparing and using the ink. It can be formed using a method.

A light emitting element has a light emitting layer between an anode and a cathode. From the viewpoint of hole injection and hole transport properties, the light emitting device of this embodiment preferably has at least one layer of a hole injection layer and a hole transport layer between the anode and the light emitting layer, From the viewpoint of electron injection properties and electron transport properties, it is preferable to have at least one layer of an electron injection layer and an electron transport layer between the cathode and the light emitting layer.

Materials for the hole transport layer, electron transport layer, light emitting layer, hole injection layer and electron injection layer include, for example, the composition of the present embodiment, as well as the hole transport material, electron transport material, and light emitting material described above. materials, hole-injecting materials and electron-injecting materials.

The material for the hole transport layer, the material for the electron transport layer, and the material for the emissive layer are based on the solvent used when forming the hole transport layer, the electron transport layer, and the layer adjacent to the emissive layer, respectively, in the production of the light emitting device. When dissolved, it is preferable that the material has a crosslinking group in order to avoid dissolving the material in the solvent. After each layer is formed using a material having a crosslinking group, the layer can be made insolubilized by crosslinking the crosslinking group.

In the light-emitting device of this embodiment, the method for forming each layer such as the light-emitting layer, hole-transporting layer, electron-transporting layer, hole-injecting layer, and electron-injecting layer includes, for example, when using a low-molecular compound, vacuum formation from powder. Examples include a vapor deposition method, a method of forming a film from a solution or a molten state, and when a polymer compound is used, for example, a method of forming a film from a solution or a molten state.

The order, number, and thickness of the laminated layers are adjusted in consideration of external quantum efficiency and luminance lifetime.

[Substrate/electrode]
The substrate in the light emitting element may be any substrate as long as it is capable of forming an electrode and is not chemically changed during the formation of an organic layer, and is, for example, a substrate made of a material such as glass, plastic, or silicon. In the case of an opaque substrate, it is preferred that the electrode furthest from the substrate be transparent or translucent.

Examples of the material for the anode include conductive metal oxides and translucent metals, preferably indium oxide, zinc oxide, tin oxide; indium tin oxide (ITO), indium zinc oxide, etc. conductive compounds; silver-palladium-copper composite (APC); NESA, gold, platinum, silver, and copper.

Examples of the cathode material include metals such as lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, barium, aluminum, zinc, and indium; alloys of two or more of these; and one of them. Alloys of at least one species selected from the group consisting of silver, copper, manganese, titanium, cobalt, nickel, tungsten, and tin; and graphite and graphite intercalation compounds. Examples of the alloy include magnesium-silver alloy, magnesium-indium alloy, magnesium-aluminum alloy, indium-silver alloy, lithium-aluminum alloy, lithium-magnesium alloy, lithium-indium alloy, and calcium-aluminum alloy.
Each of the anode and the cathode may have a laminated structure of two or more layers.

[Application]
In order to obtain planar light emission using a light emitting element, planar anodes and cathodes may be arranged so as to overlap. In order to obtain patterned light emission, there is a method of installing a mask with patterned windows on the surface of a planar light emitting element, and a method of forming an extremely thick layer to make the non-emissive area substantially non-emissive. There is a method in which the anode, the cathode, or both electrodes are formed in a pattern. By forming a pattern using any of these methods and arranging several electrodes so that they can be turned on and off independently, a segment type display device that can display numbers, characters, etc. can be obtained. In order to obtain a dot matrix display device, both the anode and the cathode may be formed in the form of stripes and arranged so as to be orthogonal to each other. Partial color display and multicolor display are possible by using a method of painting multiple types of polymer compounds with different emission colors, a method of using a color filter, or a fluorescence conversion filter. A dot matrix display device can be driven passively, or can be driven actively in combination with a TFT or the like. These display devices can be used for displays on computers, televisions, mobile terminals, and the like. A planar light emitting element can be suitably used as a planar light source for a backlight of a liquid crystal display device or a planar light source for illumination. If a flexible substrate is used, it can also be used as a curved light source and display device.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to these Examples.

In the examples, the number average molecular weight (Mn) in terms of polystyrene and the weight average molecular weight (Mw) in terms of polystyrene of the polymer compound were determined using one of the following size exclusion chromatography methods (SEC) using tetrahydrofuran as the moving phase. It was determined by In addition, each measurement condition of SEC is as follows.

<Measurement conditions 1>
The polymer compound to be measured was dissolved in tetrahydrofuran at a concentration of about 0.05% by weight, and 10 μL was injected into SEC. The mobile phase was run at a flow rate of 1.0 mL/min. PLgel MIXED-B (manufactured by Polymer Laboratories) was used as a column. A UV-VIS detector (manufactured by Tosoh, trade name: UV-8320GPC) was used as a detector.

<Measurement conditions 2>
The polymer compound to be measured was dissolved in tetrahydrofuran at a concentration of about 0.05% by weight, and 10 μL was injected into SEC. The mobile phase was run at a flow rate of 0.6 mL/min. As columns, one each of TSKguardcolumn SuperAW-H, TSKgel Super AWM-H, and TSKgel SuperAW3000 (all manufactured by Tosoh) were used, connected in series. A UV-VIS detector (manufactured by Tosoh, trade name: UV-8320GPC) was used as a detector.

High performance liquid chromatography (HPLC) area percentage values were used as an indicator of compound purity. Unless otherwise specified, this value is a value at UV=254 nm using HPLC (manufactured by Shimadzu Corporation, trade name: LC-20A). At this time, the compound to be measured was dissolved in tetrahydrofuran or chloroform to a concentration of 0.01 to 0.2% by weight, and 1 to 10 μL was injected into HPLC depending on the concentration. As the mobile phase for HPLC, the ratio of acetonitrile/tetrahydrofuran was varied from 100/0 to 0/100 (volume ratio), and the mixture was flowed at a flow rate of 1.0 mL/min. The column used was Kaseisorb LC ODS 2000 (manufactured by Tokyo Kasei Kogyo) or an ODS column having equivalent performance. A photodiode array detector (manufactured by Shimadzu Corporation, trade name: SPD-M20A) was used as a detector.

<Compounds PM1 to PM17>
Compounds PM1 and PM5 were synthesized according to the method described in JP-A-2011-174062.
Compound PM2 was synthesized according to the method described in International Publication No. 2005/049546.
Compound PM3 was synthesized according to the method described in International Publication No. 2002/045184.
Compound PM4 was synthesized according to the method described in JP-A-2008-106241.
Compound PM6 was synthesized according to the method described in JP-A-2012-144722.
A commercially available product was used as compound PM7.
Compound PM8 was synthesized according to the method described in JP-A No. 2004-143419.
Compound PM9 was synthesized according to the method described in JP-A-2010-031259.
Compound PM10 was synthesized according to the method described in International Publication No. 2009/131255.
Compound PM11 was synthesized according to the method described in International Publication No. 2016/031639.
Compound PM12 was synthesized according to the method described in JP-A-2010-189630.
Compound PM13 was synthesized according to the method described in International Publication No. 2015/008851.
Compound PM14 was synthesized according to the method described in International Publication No. 2019/004248.

<Synthesis Example 1> Synthesis of Compound 10 (Synthesis of Compound 10-1)

After creating an argon gas atmosphere inside the reaction vessel, 3,5-di-t-butylaniline (4.00g), 1-bromo-3,5-di-t-butylbenzene (4.77g), and Pd ₂ (dba) were added. ₃ (dba) _0.75 (0.058g), t- _Bu3PHBF4 (0.032g), t-BuONa ( _2.55g ) and toluene (143mL) were added, and the mixture was stirred at 30°C for 1.5 hours. The resulting mixture was filtered through a short column layered with silica gel and Celite, and the resulting filtrate was concentrated under reduced pressure to obtain Compound 10-1 (9.74 g, oil). The HPLC area percentage value of compound 10-1 was 96.9%.

(Synthesis of compound 10-2)

After creating an argon gas atmosphere in the reaction vessel, compound 10-1 (4.35g), 1,3-dibromo-5-iodobenzene (4.00g), palladium acetate (0.113g), Xantphos (0.320g), t- BuONa (1.45 g) and toluene (65 mL) were added, and the mixture was stirred for 4.5 hours while raising the temperature stepwise from 60°C to 80°C. The resulting mixture was filtered through a short column laminated with silica gel and celite, and the resulting filtrate was concentrated under reduced pressure to obtain a crude product. The obtained crude product was purified by silica gel column chromatography (mixed solvent of hexane and toluene), concentrated under reduced pressure, and dried to obtain Compound 10-2 (5.26 g, pale red-white powder). The HPLC area percentage value of compound 10-2 was 89.8%.

(Synthesis of compound 10-3)

After creating an argon gas atmosphere inside the reaction vessel, 2-bromo-5-chloro-m-xylene (10.00g), pt-butylaniline (8.16g), Pd ₂ (dba) ₃ (dba) _0.75 (0.746g) , t-Bu ₃ PHBF ₄ (0.416 g), t-BuONa (6.57 g) and toluene (250 mL) were added, and the mixture was stirred at 30° C. for 1 hour. The resulting mixture was filtered through a short column laminated with silica gel and celite, and the resulting filtrate was concentrated under reduced pressure to obtain a crude product. The obtained crude product was purified by silica gel column chromatography (mixed solvent of hexane and toluene), concentrated under reduced pressure, and dried to obtain Compound 10-3 (13.16 g, pale yellow solid). The HPLC area percentage value of compound 10-3 was 99.3%.

(Synthesis of compound 10-4)

After creating an argon gas atmosphere in the reaction vessel, compound 10-2 (5.20 g), compound 10-3 (5.25 g), Pd ₂ (dba) ₃ (dba) _0.75 (0.452 g), t-Bu ₃ PHBF ₄ (0.252 g), t-BuONa (2.39 g) and toluene (104 mL) were added, and the mixture was stirred at 50°C for 2 hours. After the resulting mixture was cooled to room temperature, it was filtered through a short column stacked with silica gel and Celite. The obtained filtrate was concentrated under reduced pressure to obtain a brown solid. The obtained solid was purified by silica gel column chromatography (mixed solvent of hexane and toluene), concentrated under reduced pressure, and dried to obtain Compound 10-4 (5.69 g, white solid). The HPLC area percentage value of compound 10-4 was 98.4%.

(Synthesis of compound 10-5)

After creating a nitrogen gas atmosphere inside the reaction vessel, compound 10-4 (4.60 g), o-dichlorobenzene (64 mL) and BBr ₃ (3.3 g) were added, and the mixture was stirred at 140° C. for 6 hours. After the resulting mixture was cooled to room temperature, toluene (64 mL) and N,N-diisopropylamine (7.9 mL) were added and stirred. The resulting mixture was filtered through a short column laminated with silica gel and celite, and the resulting filtrate was concentrated under reduced pressure to obtain a brown oil. The obtained oil was purified by silica gel column chromatography (mixed solvent of hexane and toluene), concentrated under reduced pressure, and dried to obtain a yellow powder. Compound 10-5 (1.55 g, yellow solid) was obtained by recrystallizing the obtained powder with a mixed solvent of toluene and acetonitrile. The HPLC area percentage value of compound 10-5 was 99.3%. By repeating these operations, the required amount of compound 10-5 was obtained.

(Synthesis of compound 10)

After creating a nitrogen gas atmosphere in the reaction vessel, compound 10-5 (1.85g), bis(pinacolato)diboron (B ₂ pin ₂ ; 1.34g), Pd ₂ (dba) ₃ (dba) _0.75 (0.048g), XPhos (0.089g), potassium acetate (1.03g), 1,2-dimethoxyethane (18mL) and toluene (4mL) were added, and the mixture was stirred at 85°C for 12 hours. After the resulting mixture was cooled to room temperature, methanol was added to stop the reaction. The resulting mixture was filtered through a short column laminated with silica gel and celite, and the resulting filtrate was concentrated under reduced pressure to obtain a yellow oil. The obtained oil was recrystallized with acetonitrile to obtain a pale yellow powder. The obtained powder was dissolved in a mixed solvent of toluene and heptane, and then activated carbon was added and stirred. The resulting mixture was filtered through Celite, concentrated under reduced pressure, and dried to obtain a yellow powder. The obtained powder was recrystallized from a mixture of toluene and acetonitrile and then dried, which was repeated twice to obtain Compound 10 (1.48 g, yellow powder). The HPLC area percentage value of compound 10 was 99.8%.

LC-MS (ESI, positive): 1232.9[M+H] ^+
1 H-NMR (CDCl _3,400MHz ) δ (ppm): 9.12 (s, 2H), 7.67 (s, 4H), 7.43 (d, 2H), 6.98 (s, 2H), 6.82 (s, 4H), 6.59(d,2H),5.46(br.s,2H),1.86(s,12H),1.46(s,18H),1.36(s,24H),1.13(s,36H).

<Synthesis example IP1> Synthesis of polymer compound IP1 Polymer compound IP1 was synthesized by the method described in JP-A-2012-144722 using compound PM1, compound PM2, compound PM3, and compound PM4. . The Mn of the polymer compound IP1 was 7.6×10 ⁴ and the Mw was 3.2×10 ⁵ .

The polymer compound IP1 is composed of a structural unit derived from compound PM1, a structural unit derived from compound PM2, a structural unit derived from compound PM3, and a structural unit derived from compound PM4, according to the theoretical value determined from the amount of raw materials. This is a copolymer in which the structural units to be derived are comprised in a molar ratio of 50:30:12.5:7.5.

<Synthesis example P1> Synthesis of polymer compound P1
Polymer compound P1 was synthesized using compound PM5, compound PM6, compound PM3, compound PM8, and compound PM9 according to the method described in JP-A-2012-144722. The Mn of the polymer compound P1 was 7.8×10 ⁴ and the Mw was 2.1×10 ⁵ .

The polymer compound P1 is composed of a structural unit derived from the compound PM5, a structural unit derived from the compound PM6, a structural unit derived from the compound PM3, and a structural unit derived from the compound PM8, according to the theoretical value determined from the amount of raw materials. This is a copolymer in which the structural unit derived from the compound PM9 and the structural unit derived from the compound PM9 are comprised in a molar ratio of 50:32:10:3:5.

<Synthesis example P2> Synthesis of polymer compound P2
After creating an inert gas atmosphere in the reaction vessel, compound PM7 (1.267g), compound PM11 (0.127g), compound 10 (0.057g), compound PM10 (1.486g), dichlorobis(tris-o-methoxyphenylphosphine) Palladium (2.09 mg) and toluene (30.5 g) were mixed and heated to 80°C. Thereafter, a 20% by mass aqueous tetraethylammonium hydroxide solution (25 mL) was added dropwise thereto, and the mixture was refluxed for 3.5 hours. Thereafter, phenylboronic acid (112.2 g) and dichlorobis(tris-o-methoxyphenylphosphine)palladium (2.13 mg) were added thereto, and the mixture was refluxed for 5 hours. After cooling the resulting reaction mixture, the reaction mixture was washed once with water, twice with a 10% by weight aqueous hydrochloric acid solution, twice with a 3% by weight aqueous ammonia solution, and twice with water. Water was removed by distilling the obtained organic layer under reduced pressure. The resulting solution was purified by passing it through a column packed with a mixture of alumina and silica gel. The obtained solution was added dropwise to methanol and stirred, and then the obtained precipitate was collected by filtration and dried to obtain 1.06 g of polymer compound P2. The Mn of the polymer compound P2 was 7.7×10 ⁴ and the Mw was 1.7×10 ⁵ .

The polymer compound P2 has a structural unit derived from PM7, a structural unit derived from PM11, a structural unit derived from compound 10, and a structural unit derived from PM10, according to the theoretical value determined from the amount of raw materials. This is a copolymer in which the structural units are comprised in a molar ratio of 44:5:1:50.

<Synthesis example P3> Synthesis of polymer compound P3
Polymer compound P3 was synthesized by the method described in JP-A-2021-163964 using compound PM12, compound PM13, and compound PM14. The Mn of the polymer compound P3 was 6.2×10 ⁴ and the Mw was 1.5×10 ⁴ .

According to the theoretical value obtained from the amount of the raw materials, the polymer compound P3 has a composition of 50:50:50:50:50:50:50:1; It is a copolymer composed of a molar ratio of 45:5.

<Synthesis example P4> Synthesis of polymer compound P4
Polymer compound P4 was synthesized using compound PM3 and compound PM15 according to the method described in JP-A No. 2004-2654. Mn of polymer compound P4 was 1.9×10 ⁵ and Mw was 5.6×10 ⁵ .

The polymer compound P4 is a copolymer composed of a structural unit derived from PM3 and a structural unit derived from compound 15 in a molar ratio of 70:30, according to the theoretical value determined from the amount of raw materials charged. It is a combination.

<Synthesis example P5> Synthesis of polymer compound P5
Polymer compound P5 was synthesized using compound PM3 and compound PM16 according to the method described in JP-A No. 2004-2654. Mn of polymer compound P5 was 5.0×10 ⁴ and Mw was 1.1×10 ⁵ .

The polymer compound P5 is a copolymer composed of a structural unit derived from PM3 and a structural unit derived from compound 16 in a molar ratio of 70:30, according to the theoretical value determined from the amount of raw materials charged. It is a combination.

<Synthesis example P6> Synthesis of polymer compound P6
Polymer compound P6 was synthesized using compound PM3 and compound PM17 according to the method described in JP-A-2004-2654. The Mn of polymer compound 6 was 3.2×10 ⁴ and the Mw was 6.1×10 ⁴ .

The polymer compound P6 is a copolymer composed of a structural unit derived from PM3 and a structural unit derived from compound 17 in a molar ratio of 70:30, according to the theoretical value determined from the amount of raw materials charged. It is a combination.

<Compounds HM-1 to HM-14>
Compound HM-3 was manufactured by Tokyo Kasei Kogyo Co., Ltd.
Compound HM-4 was synthesized according to the method described in International Publication No. 2018/198971.
Compound HM-5 was manufactured by Sigma-Aldrich.
Compound HM-6 was synthesized according to the method described in International Publication No. 2012/048820.
Compound HM-7 was synthesized according to the method described in International Publication No. 2016/194695.
Compound HM-8 was manufactured by Tokyo Chemical Industry Co., Ltd.
Compound HM-9 was manufactured by 1-Material.
Compound HM-10 was synthesized according to the method described in International Publication No. 2007/058368.
Compound HM-12 was synthesized according to the method described in International Publication No. 2017/170325.
Compound HM-13 was synthesized according to the method described in International Publication No. 2017/170314.
Compound HM-14 was synthesized according to the method described in International Publication No. 2018/198975.

<Synthesis Example HM-1> Synthesis of compound HM-1

(Stage 1: Synthesis of compound HM-1a)
After creating a nitrogen atmosphere inside the reaction vessel, 3-bromoiodobenzene (300.0 g), 3-biphenylboronic acid (200.0 g), tetrakis(triphenylphosphine)palladium (0) (22.2 g), and potassium carbonate were added. (418.8 g), ion-exchanged water (1600 mL), ethanol (800 mL), and toluene (1600 mL) were added, and the mixture was stirred at 75° C. for 9 hours. After the obtained reaction solution was cooled to room temperature, it was filtered through a filter lined with Celite, and the aqueous layer was removed from the obtained filtrate. The obtained organic layer was washed with ion-exchanged water, filtered, and the obtained filtrate was concentrated under reduced pressure to obtain a crude product. The obtained crude product was purified by silica gel column chromatography (n-hexane solvent) and dried under reduced pressure at 50° C. to obtain compound HM-1a (278.2 g). The HPLC area percentage value of compound HM-1a was greater than 99.5%.

(Stage 2: Synthesis of compound HM-1c)
After creating a nitrogen atmosphere in the reaction vessel, compound HM-1b (55.0 g), bis(pinacolato)diboron (38.7 g), potassium acetate (40.9 g), [1,1'-bis(diphenylphosphino)] ) Ferrocene]dichloropalladium(II)-dichloromethane adduct (3.41 g) and 1,2-dimethoxyethane (825 mL) were added, and the mixture was heated and stirred at 90° C. for 7 hours. Thereafter, toluene was added and the mixture was filtered through a filter lined with Celite, and the resulting filtrate was concentrated under reduced pressure. After that, toluene and activated carbon were added, stirred at room temperature for 30 minutes, filtered through a filter lined with celite, concentrated the obtained filtrate under reduced pressure, and further crystallized with a mixed solvent of toluene/acetonitrile to obtain a compound. HM-1c (53.9 g) was obtained as a white solid. The HPLC area percentage value of compound HM-1c was greater than 99.8%.

(Stage 2: Synthesis of compound HM-1)
After creating a nitrogen gas atmosphere inside the reaction vessel, compound HM-1c (26.5 g), compound HM-1a (18.0 g), toluene (450 mL), tris(dibenzylideneacetone)dipalladium (0) (0. 79g), 2-dicyclohexylphosphino-2',6'-dimethoxy-1,1'-biphenyl (1.19g) and 20% by mass aqueous tetrabutylammonium hydroxide solution (230g) were added, and the mixture was stirred at 90°C for 3 hours. did. Thereafter, the obtained reaction solution was cooled to room temperature, and then filtered through a filter lined with Celite. After washing the obtained filtrate with ion exchange water, the obtained organic layer was dried over anhydrous sodium sulfate and filtered. The obtained filtrate was concentrated under reduced pressure to obtain a crude product. The obtained crude product was recrystallized from a mixed solvent of toluene/acetonitrile and dried under reduced pressure at 50° C. to obtain compound HM-1 (27.4 g). The LC area percentage value of compound HM-1 was greater than 99.9%.

<Synthesis Example HM-2> Synthesis of compound HM-2

(Stage 1: Synthesis of compound HM-2b)
After creating a nitrogen atmosphere inside the reaction vessel, compound HM-2a (19.2 g) and dichloromethane (285 mL) were added, and the mixture was cooled to 0°C. Sulfuric acid (8.7 g) was slowly added thereto, and the mixture was stirred at 0°C for 1 hour. A solution of iodine monochloride (41.46 g) dissolved in dichloromethane (95 mL) was slowly added dropwise thereto, and the mixture was stirred at 0° C. for 1 hour.

After adding the sodium sulfite aqueous solution dropwise, the temperature was raised to room temperature. Dichloromethane was added, and the resulting organic layer was washed four times with ion-exchanged water, then dehydrated by adding magnesium sulfate, filtered, and the resulting solution was concentrated under reduced pressure to obtain a crude product. The crude product was washed with methanol to obtain compound HM-2b (25.9 g) as a white solid. The HPLC area percentage value of compound HM-2b was greater than 99.5%.

(Stage 2: Synthesis of compound HM-2c)
After creating a nitrogen atmosphere in the reaction vessel, compound HM-2b (24.33 g), 3-biphenylboronic acid (24.75 g), tetrakis(triphenylphosphine)palladium (0) (3.44 g), potassium carbonate ( 49.35 g), ion-exchanged water (243 mL), ethanol (73 mL), and toluene (243 mL) were added, and the mixture was stirred at 75° C. for 22 hours. After the obtained reaction solution was cooled to room temperature, it was filtered through a filter lined with Celite, and the aqueous layer was removed from the obtained filtrate. The obtained organic layer was washed with ion-exchanged water, filtered, and the obtained filtrate was concentrated under reduced pressure to obtain a crude product. The obtained crude product was recrystallized with a mixed solvent of toluene/ethanol and dried under reduced pressure at 50° C. to obtain compound HM-2c (22.0 g). The LC area percentage value of compound HM-2c was greater than 99.5%.

(Stage 3: Synthesis of compound HM-2e)
After creating a nitrogen atmosphere inside the reaction vessel, compound HM-2c (19.82 g) and tetrahydrofuran (207 mL) were added, and the mixture was cooled to -70°C. A 1.0 Msec-butyllithium n-hexane/cyclohexane solution (42 mL) was slowly added thereto, and the mixture was stirred at -70°C for 1 hour. Compound HM-2d (4.14 g) and tetrahydrofuran (62 mL) were slowly added dropwise thereto, followed by stirring at -65°C for 1 hour. After slowly adding methanol (1.7 mL), the resulting reaction solution was brought to room temperature, ion-exchanged water and toluene were added, and the aqueous layer was removed. The obtained organic layer was washed with ion-exchanged water, dried over magnesium sulfate, and then filtered. The obtained filtrate was concentrated under reduced pressure to obtain a crude product. The obtained crude product was purified by silica gel column chromatography (mixed solvent of toluene and n-hexane) and dried under reduced pressure at 50° C. to obtain compound HM-2e (18.3 g). The LC area percentage value of compound HM-8e was greater than 99.5%.

(Stage 4: Synthesis of compound HM-2)
After creating a nitrogen atmosphere inside the reaction vessel, compound HM-2e (18.2 g) and toluene (364 mL) were added, and the mixture was cooled to 0°C. Sulfuric acid (1.9 g) was slowly added thereto, and the mixture was stirred at 0°C for 2 hours. Ion-exchanged water was slowly added, and the resulting reaction solution was cooled to room temperature, and then the aqueous layer was removed. The obtained organic layer was washed with ion-exchanged water, filtered, and the obtained filtrate was concentrated under reduced pressure to obtain a crude product. The obtained crude product was recrystallized from a mixed solvent of toluene/acetonitrile and dried under reduced pressure at 50° C. to obtain compound HM-2 (15.2 g). The LC area percentage value of compound HM-2 was greater than 99.9%.

1H-NMR (CD2Cl2-d2, 400MHz): δ (ppm) = 7.84 (d, 2H), 7.79 (s, 2H), 7.74 (s, 4H), 7.64 (d, 2H ), 7.58-7.35 (m, 40H).

<Synthesis Example HM-11> Synthesis of compound HM-11

(Stage 1: Synthesis of compound X)
After creating a nitrogen atmosphere inside the reaction vessel, compound HM-1a (138 g) and tetrahydrofuran (1575 mL) were added, and the mixture was cooled to -70°C. A 1.6M n-butyllithium n-hexane solution (156 mL) was slowly added thereto, and the mixture was stirred at -70°C for 2 hours. 2,7-dibromophenanthrene-9,10-dione (63 g) was added thereto, followed by stirring at -65°C for 3 hours. After slowly adding methanol (63 mL), the resulting reaction solution was brought to room temperature, ion-exchanged water and toluene were added, and the aqueous layer was removed. The obtained organic layer was washed with ion-exchanged water, dried over magnesium sulfate, and then filtered. The obtained filtrate was concentrated under reduced pressure to obtain a crude product. The obtained crude product was purified by silica gel column chromatography (mixed solvent of toluene and n-hexane) and dried under reduced pressure at 50° C. to obtain Compound X (108 g). The LC area percentage value of Compound X was greater than 98.0%.

(Stage 2: Synthesis of compound Y)
After creating a nitrogen atmosphere inside the reaction vessel, compound X (97 g) and acetic acid (1940 mL) were added, and the temperature was raised to 110°C. Zinc powder (53 g) and 35% hydrochloric acid water (25 ml) were slowly added thereto, and the mixture was stirred at 95° C. for 24 hours. Ion-exchanged water was slowly added, and the resulting reaction solution was cooled to room temperature, and then the aqueous layer was removed. The obtained organic layer was washed with ion-exchanged water, filtered, and the obtained filtrate was concentrated under reduced pressure to obtain a crude product. The obtained crude product was recrystallized using silica gel column chromatography (a mixed solvent of toluene and n-hexane) and a mixed solvent of toluene/acetonitrile, and then dried under reduced pressure at 50°C to obtain compound Y (39 g). Ta. The LC area percentage value of Compound Y was greater than 99.8%.

(Stage 3: Synthesis of compound HM-11)
After creating a nitrogen atmosphere inside the reaction vessel, compound Y (9.0 g) and tetrahydrofuran (270 mL) were added, and the mixture was cooled to -70°C. A 1.0M sec-butyllithium n-hexane/cyclohexane solution (23.7 mL) was slowly added thereto, and the mixture was stirred at -70°C for 2 hours. After slowly adding methanol (18 mL) thereto, the resulting reaction solution was brought to room temperature, ion-exchanged water and toluene were added, and the aqueous layer was removed. The obtained organic layer was washed with ion-exchanged water, dried over magnesium sulfate, and then filtered. The obtained crude product was recrystallized by silica gel column chromatography (a mixed solvent of toluene and n-hexane) and a mixed solvent of toluene/acetonitrile, and dried under reduced pressure at 50°C to obtain compound HM-11 (5. 2g) was obtained. The LC area percentage value of compound HM-11 was greater than 99.5%.

<Example D1>
(Formation of anode and hole injection layer)
An anode was formed by forming an ITO film with a thickness of 45 nm on a glass substrate by sputtering. A hole injection material, ND-3202 (manufactured by Nissan Chemical Industries, Ltd.), was formed into a film with a thickness of 35 nm by spin coating on the anode, and heated on a hot plate at 240° C. for 15 minutes in an air atmosphere. This formed a hole injection layer.

(Formation of hole transport layer)
Polymer compound IP1 was dissolved in xylene at a concentration of 0.60% by mass. Using the obtained xylene solution, a film with a thickness of 20 nm was formed by spin coating on the hole injection layer, and the hole injection layer was heated at 200°C for 30 minutes on a hot plate in a nitrogen gas atmosphere. A transport layer was formed.

(Formation of light emitting layer)
Polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass) were dissolved in xylene at a concentration of 1.5% by mass. Using the obtained xylene solution, a film with a thickness of 60 nm was formed by spin coating on the hole transport layer, and a light emitting layer was formed by heating at 170° C. for 10 minutes in a nitrogen gas atmosphere.

(Formation of cathode)
After reducing the pressure of the substrate on which the light-emitting layer was formed to 1.0×10 ⁻⁴ Pa or less in a vapor deposition machine, about 4 nm of sodium fluoride was applied on the light-emitting layer as a cathode, and then on the sodium fluoride layer. Aluminum was deposited to a thickness of about 80 nm. After vapor deposition, the light emitting element D1 was produced by sealing using a glass substrate.

(Evaluation of light emitting element)
By applying a voltage to the light emitting element D1, EL light emission having the maximum peak wavelength of the emission spectrum at 460 nm was observed. Constant current driving was performed at a current density of 10 mA/cm ² and the driving voltage was measured. The results are shown in Table 2.

<Example D2> Production and evaluation of light emitting element D2 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D2 was produced in the same manner as Example D1, except that "polymer compound P1 and compound HM-2 (polymer compound P1/compound HM-2 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D2, EL light emission having the maximum peak wavelength of the emission spectrum at 460 nm was observed. Constant current driving was performed at a current density of 10 mA/cm ² and the driving voltage was measured. The results are shown in Table 2.

<Comparative Example CD1> Production and evaluation of light emitting device CD1 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 A light emitting device CD1 was produced in the same manner as in Example D1 except that "polymer compound P1" was used.

By applying a voltage to the light emitting element CD1, EL light emission having the maximum peak wavelength of the emission spectrum at 460 nm was observed. Constant current driving was performed at a current density of 10 mA/cm ² and the driving voltage was measured. The results are shown in Table 2.

<Example D3> Production and evaluation of light emitting element D3 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D3 was produced in the same manner as Example D1, except that "polymer compound P2 and compound HM-1 (polymer compound P2/compound HM-1 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D3, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 10 mA/cm ² and the driving voltage was measured. The results are shown in Table 2.

<Example D4> Production and evaluation of light emitting element D4 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D4 was produced in the same manner as Example D1 except that "polymer compound P2 and compound HM-2 (polymer compound P2/compound HM-2 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D4, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 10 mA/cm ² and the driving voltage was measured. The results are shown in Table 2.

<Comparative Example CD2> Production and evaluation of light emitting device CD2 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 A light emitting device CD2 was produced in the same manner as in Example D1 except that "polymer compound P2" was used.

By applying a voltage to the light emitting element CD2, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 10 mA/cm ² and the driving voltage was measured. The results are shown in Table 2.

<Example D5> Production and evaluation of light emitting element D5 Instead of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D5 was produced in the same manner as Example D1 except that "polymer compound P2 and compound HM-3 (polymer compound P2/compound HM-3 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D5, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 100 mA/cm ² and the driving voltage was measured.

<Example D6> Production and evaluation of light emitting element D6 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D6 was produced in the same manner as Example D1, except that "polymer compound P2 and compound HM-4 (polymer compound P2/compound HM-4 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D6, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 100 mA/cm ² and the driving voltage was measured.

<Comparative Example CD3> Production and evaluation of light emitting element CD3 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , a light emitting device CD3 was produced in the same manner as Example D1, except that "polymer compound P2 and compound HM-5 (polymer compound P2/compound HM-5 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element CD3, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 100 mA/cm ² and the driving voltage was measured.

Table 3 shows the results of Examples D5 to D6 and Comparative Example CD3. In Table 3, the drive voltage difference [V] indicates the difference between the drive voltages of the light emitting elements D5 and D6 with respect to the drive voltage of the light emitting element CD3.

<Example D7> Production and evaluation of light emitting element D7 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D7 was produced in the same manner as Example D1 except that "polymer compound P2 and compound HM-6 (polymer compound P2/compound HM-6 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D7, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 200 mA/cm ² and the driving voltage was measured.

<Comparative Example CD4> Preparation and evaluation of light emitting element CD4 Instead of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , a light emitting device CD4 was produced in the same manner as Example D1, except that "polymer compound P2 and compound HM-7 (polymer compound P2/compound HM-7 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element CD4, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 200 mA/cm ² and the driving voltage was measured.

Table 4 shows the results of Example D7 and Comparative Example CD4. In Table 4, the drive voltage difference [V] indicates the difference between the drive voltage of the light emitting element D7 and the drive voltage of the light emitting element CD4.

<Example D8> Production and evaluation of light emitting element D8 Instead of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting device D8 was produced in the same manner as Example D1, except that "polymer compound P2 and compound HM-8 (polymer compound P2/compound HM-8 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D8, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 150 mA/cm ² and the driving voltage was measured.

<Example D9> Production and evaluation of light emitting element D9 Instead of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D9 was produced in the same manner as Example D1 except that "polymer compound P2 and compound HM-9 (polymer compound P2/compound HM-9 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D9, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 150 mA/cm ² and the driving voltage was measured.

<Comparative Example CD5> Production and evaluation of light emitting element CD5 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , a light-emitting device CD5 was produced in the same manner as Example D1, except that "polymer compound P2 and compound HM-10 (polymer compound P2/compound HM-10 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element CD5, EL light emission having the maximum peak wavelength of the emission spectrum at 520 nm was observed. Constant current driving was performed at a current density of 150 mA/cm ² and the driving voltage was measured.

Table 5 shows the results of Examples D8 to D9 and Comparative Example CD5. In Table 5, the drive voltage difference [V] indicates the difference between the drive voltages of the light emitting elements D8 and D9 with respect to the drive voltage of the light emitting element CD5.

<Example D10> Production and evaluation of light emitting element D10 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting device D10 was produced in the same manner as Example D1, except that "polymer compound P3 and compound HM-11 (polymer compound P3/compound HM-11 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D10, EL light emission having the maximum peak wavelength of the emission spectrum at 470 nm was observed. Constant current driving was performed at a current density of 70 mA/cm ² and the driving voltage was measured.

<Example D11> Production and evaluation of light emitting element D11 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting device D11 was produced in the same manner as Example D1, except that "polymer compound P3 and compound HM-12 (polymer compound P3/compound HM-12 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D11, EL light emission having the maximum peak wavelength of the emission spectrum at 470 nm was observed. Constant current driving was performed at a current density of 70 mA/cm ² and the driving voltage was measured.

<Example D12> Production and evaluation of light emitting element D12 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D12 was produced in the same manner as Example D1, except that "polymer compound P3 and compound HM-13 (polymer compound P3/compound HM-13 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D12, EL light emission having the maximum peak wavelength of the emission spectrum at 470 nm was observed. Constant current driving was performed at a current density of 70 mA/cm ² and the driving voltage was measured.

<Example D13> Production and evaluation of light emitting element D13 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D13 was produced in the same manner as Example D1 except that "polymer compound P3 and compound HM-6 (polymer compound P3/compound HM-6 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D13, EL light emission having the maximum peak wavelength of the emission spectrum at 470 nm was observed. Constant current driving was performed at a current density of 70 mA/cm ² and the driving voltage was measured.

<Example D14> Production and evaluation of light emitting device D14 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D14 was produced in the same manner as Example D1, except that "polymer compound P3 and compound HM-14 (polymer compound P3/compound HM-14 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D14, EL light emission having the maximum peak wavelength of the emission spectrum at 465 nm was observed. Constant current driving was performed at a current density of 70 mA/cm ² and the driving voltage was measured.

<Comparative Example CD6> Production and evaluation of light emitting element CD6 Instead of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 A light emitting device CD6 was produced in the same manner as in Example D1 except that "polymer compound P3" was used.

By applying a voltage to the light emitting element CD6, EL light emission having the maximum peak wavelength of the emission spectrum at 465 nm was observed. Constant current driving was performed at a current density of 70 mA/cm ² and the driving voltage was measured.

Table 6 shows the results of Examples D10 to D14 and Comparative Example CD6. In Table 6, the drive voltage difference [V] indicates the difference between the drive voltages of the light emitting elements D10 to D14 with respect to the drive voltage of the light emitting element CD6.

<Example D15> Production and evaluation of light emitting element D15 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting device D15 was produced in the same manner as Example D1, except that "polymer compound P4 and compound HM-1 (polymer compound P4/compound HM-1 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D15, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 100 mA/cm ² and the driving voltage was measured.

<Comparative Example CD7> Production and evaluation of light emitting device CD7 Instead of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 A light emitting device CD7 was produced in the same manner as in Example D1 except that "polymer compound P4" was used.

By applying a voltage to the light emitting element CD7, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 100 mA/cm ² and the driving voltage was measured.

<Comparative Example CD8> Production and evaluation of light emitting device CD8 Instead of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , a light emitting device CD8 was produced in the same manner as in Example D1, except that "polymer compound P5 and compound HM-1 (polymer compound P5/compound HM-1 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element CD8, EL light emission having the maximum peak wavelength of the emission spectrum at 445 nm was observed. Constant current driving was performed at a current density of 100 mA/cm ² and the driving voltage was measured.

Table 7 shows the results of Example D15, Comparative Example CD7, and Comparative Example CD8. In Table 7, the drive voltage difference [V] indicates the difference between the drive voltages of the light emitting elements D1 and CD7 with respect to the drive voltage of the light emitting element CD8.

<Example D16> Production and evaluation of light emitting element D16 In place of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 , Light-emitting element D16 was produced in the same manner as Example D1, except that "polymer compound P6 and compound HM-1 (polymer compound P6/compound HM-1 = 50% by mass/50% by mass)" was used. did.

By applying a voltage to the light emitting element D16, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 100 mA/cm ² and the driving voltage was measured.

<Comparative Example CD9> Production and evaluation of light emitting element CD9 Instead of "polymer compound P1 and compound HM-1 (polymer compound P1/compound HM-1 = 50% by mass/50% by mass)" in Example D1 A light emitting device CD9 was produced in the same manner as in Example D1 except that "polymer compound P6" was used.

By applying a voltage to the light emitting element CD9, EL light emission having the maximum peak wavelength of the emission spectrum at 450 nm was observed. Constant current driving was performed at a current density of 100 mA/cm ² and the driving voltage was measured.

Table 8 shows the results of Example D16 and Comparative Example CD9. In Table 8, the drive voltage difference [V] indicates the difference between the drive voltage of the light emitting element D16 and the drive voltage of the light emitting element CD9.

Claims (13)

A compound represented by formula (FH) and a polymer containing a structural unit having a fused heterocyclic skeleton (b) containing in the ring one type of atom selected from a boron atom and a nitrogen atom that does not form a double bond. A composition comprising a molecular compound (B).

[In the formula,
n ^1H represents an integer of 0 or more.
Ar ^1H represents a group obtained by removing n ^1H hydrogen atoms directly bonded to atoms constituting the ring from a polycyclic aromatic hydrocarbon, and this group includes an aryl group, a monovalent heterocyclic group, and a substituted amino group. It may have a substituent other than the group. When a plurality of substituents exist, they may be the same or different, and may be bonded to each other to form a ring with the atoms to which they are bonded.
R ^1H represents an aryl group or a monovalent heterocyclic group, and these groups may have a substituent. When a plurality of substituents exist, they may be the same or different, and may be bonded to each other to form a ring with the atoms to which they are bonded. When a plurality of R ^1Hs exist, they may be the same or different. However, the monovalent heterocyclic group has a ring skeleton different from the fused heterocyclic skeleton (b). ] A polymer comprising a compound represented by formula (C) and a structural unit having a fused heterocyclic skeleton (b) containing in the ring one type of atom selected from a boron atom and a nitrogen atom that does not form a double bond. A composition comprising a molecular compound (B).

[In the formula,
Ring R ^1C and ring R ^2C each independently represent an aromatic hydrocarbon ring, and these rings may have a substituent. When a plurality of the substituents are present, they may be bonded to each other to form a ring with the atoms to which they are bonded.
Y ^a is a group represented by -C(R ^Xa ) ₂ -, a group represented by -C(R ^Xa ) ₂ -C(R ^Xa ) ₂ -, -C(R ^Xa )=C( ^R )-- or represents a group represented by formula (C'). R ^Xa represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group, a substituted amino group, or a halogen atom; It may have. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded. A plurality of R ^Xa may be the same or different, and may be bonded to each other to form a ring with the atoms to which they are bonded. ]

[In the formula,
Ring R ^3C and ring R ^4C each independently represent an aromatic hydrocarbon ring or an aromatic heterocycle, and these rings may have a substituent. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded. ] The composition according to claim 1 or 2, wherein the polymer compound (B) is a polymer compound containing a structural unit having a residue of a compound represented by formula (1).

[In the formula,
Ring A, ring B, and ring C each independently represent an aromatic hydrocarbon ring or an aromatic heterocycle, and these rings may have a substituent. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded.
X represents a boron atom or a nitrogen atom.
Y ¹ , Y ² and Y ³ each independently represent a single bond, an oxygen atom, a group represented by -N(Ry)-, a group represented by -B(Ry)-, a sulfur atom, a selenium atom, Represents an alkylene group or a cycloalkylene group. Ry represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded. When multiple Rys exist, they may be the same or different. Ry may be bonded to the A ring, the B ring, or the C ring directly or via a linking group.
n2 is 0 or 1. When n2 is 0, -Y ² - does not exist.
n3 is 0 or 1. When n3 is 0, -Y ³ - does not exist. ] The composition according to claim 2, wherein the Y ^a is a group represented by -C(R ^Xa ) ₂ - or a group represented by formula (C'). The composition according to claim 4, wherein the R ^Xa is an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. The composition according to claim 3, wherein the Y ¹ , the Y ² and the Y ³ are an oxygen atom or a group represented by -N(Ry)-. The composition according to claim 2, wherein the compound represented by formula (C) is a compound represented by formula (C-2) or a compound represented by formula (C'-2).

[In the formula, R ^Xa represents the same meaning as above.
E ^11C , E ^12C , E ^13C , E ^14C , E ^21C , E ^22C , E ^23C , E ^24C represent carbon atoms, E ^31C , E ^32C , E ^33C , E ^34C , E ^41C , E ^42C , E ^43C and E ^44C each independently represent a nitrogen atom or a carbon atom.
R ^11C , R ^12C , R ^13C , R ^14C , R 21C , R ^22C , R ^23C , R ^24C , R ^31C , R ^32C , R ^{33C ,} R ^34C , R ^41C , R ^42C , R ^43C and R ^44C are each independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group, a substituted amino group, or a halogen atom; may have. When a plurality of these substituents exist, they may be bonded to each other to form a ring with the atoms to which they are bonded.
When E ^31C is a nitrogen atom, R ^31C is not present. When E ^32C is a nitrogen atom, R ^32C is not present. When E ^33C is a nitrogen atom, R ^33C is not present. When E ^34C is a nitrogen atom, R ^34C is not present. When E ^41C is a nitrogen atom, R ^41C is not present. When E ^42C is a nitrogen atom, R ^42C is not present. When E ^43C is a nitrogen atom, R ^43C is not present. When E ^44C is a nitrogen atom, R ^44C is not present.
R ^11C and R ^12C , R ^12C and R ^13C , R ^13C and R ^14C , R ^14C and R ^34C , R ^34C and R ^33C , R ^33C and R ^32C , R ^32C and R ^31C , R ^31C and R ^41C , R ^41C and R ^42C , R ^42C and R ^43C , R ^43C and R ^44C , R ^44C and R ^24C , R ^24C and R ^23C , R ^23C and R ^22C , R ^22C and R ^21C , and R ^21C and R ^11C are respectively They may be bonded to form a ring together with the carbon atoms to which they are bonded. ] The composition according to claim 7, wherein the E ^31C , the E ^32C , the E ^33C , the E ^34C , the E ^41C , the E ^42C , the E ^43C and the E ^44C are carbon atoms. The composition according to claim 2, wherein the compound represented by the formula (C) is a compound represented by the formula (C-2). The composition according to claim 1 or 2, wherein the polymer compound (B) further contains a structural unit represented by formula (Y).

[In the formula, Ar ^Y1 represents an arylene group, a divalent heterocyclic group, or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are directly bonded; The group may have a substituent. However, the structural unit represented by formula (Y) has a fused heterocyclic skeleton (b) containing in the ring one type of atom selected from the boron atom and a nitrogen atom that does not form a double bond. Different from unit. ] The composition according to claim 1 or 2, wherein the polymer compound (B) further contains a structural unit represented by formula (X).

[In the formula,
a ¹ and a ² each independently represent an integer of 0 or more.
Ar ^X1 and Ar ^X3 each independently represent an arylene group or a divalent heterocyclic group, and these groups may have a substituent.
Ar ^X2 and Ar ^X4 each independently represent an arylene group, a divalent heterocyclic group, or a divalent group in which at least one arylene group and at least one divalent heterocyclic group are directly bonded and these groups may have a substituent. When a plurality of Ar ^X2 and Ar ^X4 exist, they may be the same or different.
R ^X1 , R ^X2 and R ^X3 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups may have a substituent. When a plurality of R ^X2 and R ^X3 exist, they may be the same or different. ] Claims 1, 2, 4, 5, and further comprising at least one selected from the group consisting of hole transport materials, hole injection materials, electron transport materials, electron injection materials, light emitting materials, antioxidants, and solvents. The composition according to any one of items 7 to 9. A light emitting device comprising the composition according to any one of claims 1, 2, 4, 5 and 7 to 9.