US20060017040A9 - Novel triarylamine polymer, process for producing the same, and use thereof - Google Patents
Novel triarylamine polymer, process for producing the same, and use thereof Download PDFInfo
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- US20060017040A9 US20060017040A9 US10/490,741 US49074104A US2006017040A9 US 20060017040 A9 US20060017040 A9 US 20060017040A9 US 49074104 A US49074104 A US 49074104A US 2006017040 A9 US2006017040 A9 US 2006017040A9
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- 0 CC.CC.CC1=C2C=CC=CC2=C(C)C2=CC=CC=C21.CC1=CC=C(*C2=CC=C(C)C=C2)C=C1.CC1=CC=C(C2(C3=CC=C(C)C=C3)C3=C(C=CC=C3)C3=C/C=C/C=C\32)C=C1.CC1=CC=CC=C1.[3*]C1([3*])C2=C(C=CC(C)=C2)C2=C\C=C(C)/C=C\21 Chemical compound CC.CC.CC1=C2C=CC=CC2=C(C)C2=CC=CC=C21.CC1=CC=C(*C2=CC=C(C)C=C2)C=C1.CC1=CC=C(C2(C3=CC=C(C)C=C3)C3=C(C=CC=C3)C3=C/C=C/C=C\32)C=C1.CC1=CC=CC=C1.[3*]C1([3*])C2=C(C=CC(C)=C2)C2=C\C=C(C)/C=C\21 0.000 description 8
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- NSJRCARBPAKQQA-UHFFFAOYSA-N C.C.C.C.CCN(C)C.CCN(C)CN(C)C Chemical compound C.C.C.C.CCN(C)C.CCN(C)CN(C)C NSJRCARBPAKQQA-UHFFFAOYSA-N 0.000 description 2
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- BSWFZQWAVHBPCQ-UHFFFAOYSA-N CCCCCCCCC1(CCCCCCCC)C2=C(C=CC(N(C3=CC=CC=C3)C3=CC=CC=C3)=C2)C2=C\C=C(N(C3=CC=CC=C3)C3=CC=C(N(C4=CC=CC=C4)C4=CC=CC=C4)C=C3)/C=C\21 Chemical compound CCCCCCCCC1(CCCCCCCC)C2=C(C=CC(N(C3=CC=CC=C3)C3=CC=CC=C3)=C2)C2=C\C=C(N(C3=CC=CC=C3)C3=CC=C(N(C4=CC=CC=C4)C4=CC=CC=C4)C=C3)/C=C\21 BSWFZQWAVHBPCQ-UHFFFAOYSA-N 0.000 description 2
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- MNVYVEVYOIEOQG-UHFFFAOYSA-N BCN(C)C.BCN(C)CN(C)C.C.C.C.C.CCC.CCC.CNCNC.N[Ar].[Ar].[Ar] Chemical compound BCN(C)C.BCN(C)CN(C)C.C.C.C.C.CCC.CCC.CNCNC.N[Ar].[Ar].[Ar] MNVYVEVYOIEOQG-UHFFFAOYSA-N 0.000 description 1
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- UKDWVSQIBGXLQA-UHFFFAOYSA-N CCCCC1=CC=C(N(C2=CC=CC=C2)C2=CC3=C(C=C2)C2=C\C=C(N(C4=CC=CC=C4)C4=CC=C(CCCC)C=C4)/C=C\2C3(C)C)C=C1 Chemical compound CCCCC1=CC=C(N(C2=CC=CC=C2)C2=CC3=C(C=C2)C2=C\C=C(N(C4=CC=CC=C4)C4=CC=C(CCCC)C=C4)/C=C\2C3(C)C)C=C1 UKDWVSQIBGXLQA-UHFFFAOYSA-N 0.000 description 1
- GYPAGHMQEIUKAO-UHFFFAOYSA-N CCCCC1=CC=C(N(C2=CC=CC=C2)C2=CC=C(C3=CC=C(N(C4=CC=CC=C4)C4=CC=C(CCCC)C=C4)C=C3)C=C2)C=C1 Chemical compound CCCCC1=CC=C(N(C2=CC=CC=C2)C2=CC=C(C3=CC=C(N(C4=CC=CC=C4)C4=CC=C(CCCC)C=C4)C=C3)C=C2)C=C1 GYPAGHMQEIUKAO-UHFFFAOYSA-N 0.000 description 1
- ASZOTTPRFANGHZ-UHFFFAOYSA-N CCCCCCCCC1(CCCCCCCC)C2=C(C=CC(N(C3=CC=CC=C3)C3=CC=CC=C3)=C2)C2=C\C=C(N(C3=CC=CC=C3)C3=C4C=CC=CC4=C(N(C4=CC=CC=C4)C4=CC=CC=C4)C4=C3C=CC=C4)/C=C\21 Chemical compound CCCCCCCCC1(CCCCCCCC)C2=C(C=CC(N(C3=CC=CC=C3)C3=CC=CC=C3)=C2)C2=C\C=C(N(C3=CC=CC=C3)C3=C4C=CC=CC4=C(N(C4=CC=CC=C4)C4=CC=CC=C4)C4=C3C=CC=C4)/C=C\21 ASZOTTPRFANGHZ-UHFFFAOYSA-N 0.000 description 1
- XEDBSDCOXUZANB-UHFFFAOYSA-N CCCCCCCCC1(CCCCCCCC)C2=C(C=CC(N(C3=CC=CC=C3)C3=CC=CC=C3)=C2)C2=C\C=C(N(C3=CC=CC=C3)C3=CC=CC=C3)/C=C\21 Chemical compound CCCCCCCCC1(CCCCCCCC)C2=C(C=CC(N(C3=CC=CC=C3)C3=CC=CC=C3)=C2)C2=C\C=C(N(C3=CC=CC=C3)C3=CC=CC=C3)/C=C\21 XEDBSDCOXUZANB-UHFFFAOYSA-N 0.000 description 1
- WHHUFOSCEWKYBX-UHFFFAOYSA-N [H]N(C1=CC=C(CCCC)C=C1)C1=C/C=C2\C3=C(C=C(NC4=CC=C(CCCC)C=C4)C=C3)C(C)(C)\C2=C\1 Chemical compound [H]N(C1=CC=C(CCCC)C=C1)C1=C/C=C2\C3=C(C=C(NC4=CC=C(CCCC)C=C4)C=C3)C(C)(C)\C2=C\1 WHHUFOSCEWKYBX-UHFFFAOYSA-N 0.000 description 1
- LGZLRERYRQQCFM-UHFFFAOYSA-N [H]N(C1=CC=C(CCCC)C=C1)C1=CC=C(C2=CC=C(NC3=CC=C(CCCC)C=C3)C=C2)C=C1 Chemical compound [H]N(C1=CC=C(CCCC)C=C1)C1=CC=C(C2=CC=C(NC3=CC=C(CCCC)C=C3)C=C2)C=C1 LGZLRERYRQQCFM-UHFFFAOYSA-N 0.000 description 1
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/026—Wholly aromatic polyamines
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- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
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- C08F32/00—Homopolymers and copolymers of cyclic compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system
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- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
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- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/124—Intrinsically conductive polymers
- H01B1/128—Intrinsically conductive polymers comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes
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Definitions
- the present invention relates to a novel triarylamine polymer, a process for its production and an organic electroluminescence (EL) element employing it.
- EL organic electroluminescence
- Materials for an organic EL element may be divided into a light emitting layer as the main component, a carrier transport layer for transporting holes or electrons, two electrodes i.e. a cathode and an anode, and other materials.
- materials for an organic EL element various low molecular materials and high molecular materials are employed for such a light emitting layer or a carrier transport layer. Especially with respect to low molecular materials, many materials have been proposed.
- electroconductive n conjugated polymers such as poly(p-phenylenevinylene), polyalkylthiophene, etc. are, for example, known (e.g. Patent Document 1), and in recent years, polymers containing triarylamines have been reported (e.g. Patent Documents 2 to 6).
- Patent Applications e.g. JP-A-3-273087, JP-A-08-054833, JP-A-08-259935, JP-A-11-035687, JP-A-11-292829, JP-A-13-098023, JP-A-11-021349, JP-A-11-080346, JP-A-11-080347, JP-A-11-080348 and JP-A-11-080349).
- Patent Applications e.g. JP-A-3-273087, JP-A-08-054833, JP-A-08-259935, JP-A-11-035687, JP-A-11-292829, JP-A-13-098023, JP-A-11-021349, JP-A-11-080346, JP-A-11-080347, JP-A-11-080348 and JP-A-11-080349).
- the present invention has been made in view of the above problems, and its object is to provide a novel triarylamine polymer which is excellent in solubility and film-forming property and has improved thermal stability; a simple process for its production; and an organic EL element employing it.
- the present inventors have conducted various studies to solve the above problems and as a result, have found a triarylamine polymer of the present invention, a process for its production and its use, whereby the present invention have been accomplished.
- the present invention provides a novel triarylamine polymer represented by the following formula (1): (wherein each of Ar 1 , Ar 2 , Ar 3 , Ar 4 , Ar 5 , Ar 6 and Ar 7 which are independent of one another, is an unsubstituted or substituted C 6-60 aromatic group, Ar 1 and Ar 2 are the same or different, Ar 3 and Ar 4 are the same or different, and m is an integer of at least 1); a process for its production; and its use.
- formula (1) wherein each of Ar 1 , Ar 2 , Ar 3 , Ar 4 , Ar 5 , Ar 6 and Ar 7 which are independent of one another, is an unsubstituted or substituted C 6-60 aromatic group, Ar 1 and Ar 2 are the same or different, Ar 3 and Ar 4 are the same or different, and m is an integer of at least 1); a process for its production; and its use.
- substituent Ar 3 and Ar 4 are preferably the same.
- Ar 1 and Ar 2 may be represented by the following formula (2): (wherein each of Ar 1 , Ar 3 , Ar 5 , Ar 6 and Ar 7 which are independent of one another, is an unsubstituted or substituted C 6-60 aromatic group, and n is an integer of at least 2.)
- Ar 5 and Ar 7 are the same, and Ar 3 and Ar 6 are the same.
- substituents Ar 5 , Ar 6 and Ar 7 represent an unsubstituted or substituted C 6-60 aromatic group, preferably a C 6-30 aromatic group.
- the aromatic group may, for example, be an unsubstituted or substituted phenyl, naphthyl, anthracenyl, phenanthryl, biphenyl, terphenyl or fluorenyl group, but a structure represented by the following formula (3) is preferred.
- R 1 each independently is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkenyl group, an aryl group, an arylamino group or a heteroaryl group, R 1 may form a condensed ring together with other substituent(s), and a is an integer of from 0 to 5.
- substituent R 1 is not particularly limited so long as it corresponds to the above definition. Specifically, it includes, in addition to a hydrogen atom, a halogen atom (such as a fluorine atom, a chlorine atom or a bromine atom), an alkyl group (such as a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a n-pentyl group, an isopentyl group, a neopentyl group, a tert-pentyl group, a cyclopentyl group, a n-hexyl group, a 2-ethylbutyl group, a 3,3-dimethylbutyl group, a cyclohexyl group, a n-hept
- substituents Ar 1 , Ar 2 , Ar 3 and Ar 4 represent an unsubstituted or substituted C 6-60 aromatic group, preferably a C 6-30 aromatic group.
- the aromatic group is preferably an unsubstituted or substituted phenyl, phenyl, naphthyl, anthracenyl, phenanthryl, biphenyl, terphenyl or fluorenyl group.
- substituents Ar 1 and Ar 2 may, for example, have a structure represented by any one of the following formulae (4) to (8): (wherein each of R 2 and R 3 which are independent of each other, is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkenyl group, an aryl group, an arylamino group or a heteroaryl group, R 2 may, together with other substituent(s), form a condensed ring, A is S, O, SO 2 , CO, CH 2 or C(CH 3 ) 2 , b is an integer of from 0 to 4, and each of c and d is an integer of from 1 to 4.)
- substituents R 2 and R 3 are not particularly limited so long as they correspond to the above definition. Specifically, substituents mentioned for substituent R 1 may, for example, be mentioned.
- substituents Ar 3 and Ar 4 may be those having structures represented by the following formulae (9) to (13).
- each of R 4 and R 5 which are independent of each other, is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkenyl group, an aryl group, an arylamino group or a heteroaryl group
- R 4 may, together with other substituent(s), form a condensed ring
- e is an integer of from 0 to 5.
- substituents R 4 and R 5 are not particularly limited so long as they correspond to the above definition. Specifically, substituents mentioned for substituent R 1 may, for example, be mentioned.
- the triarylamine polymer of the present invention is not particularly limited so long as it corresponds to the above definition, but those of the following formulae (14) to (18) are particularly preferred: (wherein each of R 6 to R 30 which are independent of one another, is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkenyl group, an aryl group, an arylamino group or a heteroaryl group, each of f, g and h is an integer of from 1 to 4, m is an integer of at least 1, and n is an integer of at least 2.)
- R 6 to R 30 are not particularly limited so long as they correspond to the above definition.
- substituents mentioned for substituent R 1 may, for example, be mentioned. They are preferably any one of a hydrogen atom and C 1-8 alkyl, alkoxy and alkenyl groups.
- the weight-average molecular weight of the triarylamine polymer of the present invention is not particularly limited so long as it is one referred to as a triarylamine polymer. However, it is preferably within a range of from 500 to 500,000, as calculated as polystyrene, more preferably within a range of from 1,000 to 100,000, as calculated as polystyrene.
- FIG. 1 shows the results of measurement by an infrared spectroscopic analysis of the triarylamine polymer represented by the formula (23).
- FIG. 2 shows the results of measurement by an infrared spectroscopic analysis of the triarylamine polymer represented by the formula (24).
- FIG. 3 shows the results of measurement by an infrared spectroscopic analysis of the triarylamine polymer represented by the formula (25).
- FIG. 4 shows the results of measurement by an infrared spectroscopic analysis of the triarylamine polymer represented by the formula (26).
- the triarylamine polymer represented by the above formula (1) or (2) of the present invention can be simply and efficiently produced by reacting a triarylamine polymer having repeating structural units represented by the following formula (19) or (20): (wherein each of Ar 1 , Ar 2 , Ar 3 and Ar 4 which are independent of one another, is an unsubstituted or substituted C 6-60 aromatic group, m is an integer of at least 1, and n is an integer of at least 2) with an arylamine represented by the following formula (21): (wherein each of Ar 5 and Ar 6 which are independent of each other, is an unsubstituted or substituted C 6-60 aromatic group) and/or an aryl halide represented by the following formula (22): X—Ar 7 (22) (wherein Ar 7 each independently is an unsubstituted or substituted C 6-60 aromatic group, and X is a halogen atom) in the presence of a base and a catalyst comprising a trialkylphosphine and/or an arylphos
- the methods for producing the triarylamine polymers represented by the above formulae (19) and (20) are not particularly limited.
- they may be prepared by polymerizing various arylene dihalides with an arylamine or an arylenediamine in the presence of a base and a catalyst comprising a trialkylphosphine and/or an arylphosphine and a palladium compound.
- each of Ar 1 , Ar 2 , Ar 3 and Ar 4 which are independent of one another, is a C 6-60 aromatic group, each of X 1 and X 2 is a halogen atom, polymer terminals B and C represent a hydrogen atom or a halogen atom, m is an integer of at least 1, and n is an integer of at least 2.
- the arylamine shown in the above formula is not particularly limited. Specifically, however, it may, for example, be aniline, 2-fluoroaniline, 3-fluoroaniline, 4-fluoroaniline, o-toluidine, m-toluidine, p-toluidine, 2-ethylaniline, 3-ethylaniline, 4-ethylaniline, 4-propylaniline, 4-n-butylaniline, 4-t-butylaniline, o-anisidine, m-anisidine, p-anisidine, o-phenetidine, m-phenetidine, p-phenetidine, 1-aminonaphthalene, 2-aminonaphthalene, 1-aminoanthracene, 2-aminoanthracene, 9-aminophenanthrene, 2-aminobiphenyl or 4-aminobiphenyl.
- the arylenediamine shown in the above formula is not particularly limited. Specifically, however, it may, for example, be N,N′-diphenylphenylenediamine, N,N′-di(2-methoxyphenyl)phenylenediamine, N,N′-di(3-methoxyphenyl)phenylenediamine, N,N′-di(4-methoxyphenyl)phenylenediamine, N,N′-di(2-methylphenyl)phenylenediamine, N,N′-di(3-methylphenyl)phenylenediamine, N,N′-di(4-methylphenyl)phenylenediamine, N,N′-di(2-hydroxyphenyl)phenylenediamine, N,N′-di(3-hydroxyphenyl)phenylenediamine, N,N′-di(4-hydroxyphenyl)phenylenediamine, N,N′-di(
- the arylene dihalide shown in the above reaction formulae is not particularly limited. Specifically, however, it may, for example, be an unsubstituted or substituted dibromoaryl (such as 1,4-dibromobenzene, 1,2-dibromobenzene, 1,3-dibromobenzene, 2,5-dibromotoluene, 3,5-dibromotoluene, 1,4-dibromo-2,5-dimethylbenzene, 1,3-dibromo-5-(trifluoromethoxy)benzene, 4,4′-dibromobiphenyl, 9,10-dibromoanthracene, N-methyl-3,6-dibromocarbazole, N-ethyl-3,6-dibromocarbazole, N-propyl-3,6-dibromocarbazole, N-butyl-3,6-dibromocarbazole, 2,7-
- the palladium compound to be used as a catalyst component is not particularly limited.
- it may be a tetravalent palladium compound (such as sodium hexachloropalladate(IV) tetrahydrate or potassium hexachloropalladate(IV))), a bivalent palladium compound (such as palladium(II) chloride, palladium(II) bromide, palladium(II) acetate, palladium(II) acetylacetonate, palladium(II) dichlorobis(benzonitrile), palladium(II) dichlorobis(acetonitrile), palladium(II) dichlorobis(triphenylphosphine), palladium(II) dichlorotetraamine, palladium(II) dichloro(cycloocta-1,5-diene) or palladium(II) trifluoroacetate), or a zerovalent palladium compound (such as dipall
- the amount of the palladium compound is not particularly limited, but for example, it is usually within a range of from 0.00001 to 20 mol %, as calculated as palladium, per mol of the halogen atoms of the arylene dihalide as the starting material. Since an expensive palladium compound is used, it is usually preferably within a range of from 0.001 top 5 mol %, as calculated as palladium, per mol of the halogen atoms of the arylene dihalide as the starting material.
- the trialkylphosphine to be used as a catalyst component in the process of the present invention is not particularly limited.
- it may be triethylphosphine, tricyclohexylphosphine, triisopropylphosphine, tri-n-butylphosphine, triisobutylphosphine, tri-sec-butylphosphine or tri-tert-butylphosphine.
- the arylphosphine to be used as a catalyst component is not particularly limited.
- it may be triphenylphosphine, tri(o-tolyl)phosphine, tri(m-tolyl)phosphine, tri(p-tolyl)phosphine, 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl(BINAP), trimethylphosphine, diphenylphosphinoethane, diphenylphosphinopropane or diphenylphoshpinoferrocene.
- the amount of the trialkylphosphine and/or the arylphosphine is not particularly limited. However, it may be used usually within a range of from 0.01 to 10,000 mols per mol of the palladium compound. Since an expensive trialkylphosphine and/or arylphosphine is used, it is preferably within a range of from 0.1 to 10 mols per mol of the palladium compound.
- the method for adding the catalysts is not particularly limited. They may simply be added as the respective catalyst components to the reaction systems, or they may be preliminarily formed into complexes comprising the respective catalyst components and then added.
- the base is not particularly limited.
- it may be an inorganic base such as a carbonate of sodium or potassium or an alkali metal alkoxide, or an organic base such as a tertiary amine.
- an alkali metal alkoxide such as sodium methoxide, sodium ethoxide, potassium methoxide, potassium ethoxide, lithium tert-butoxide, sodium tert-butoxide or potassium tert-butoxide.
- Such a base may be added as it is to the reaction system.
- it may be prepared from an alkali metal, an alkali metal hydride or an alkali metal hydroxide, and an alcohol at the site and then added to the reaction system.
- a tertiary alkoxide such as lithium tert-butoxide, sodium tert-butoxide or potassium tert-butoxide, is added, as it is, to the reaction system.
- the amount of the base is not particularly limited, but is preferably at least 0.5 mol per mol of the halogen atoms of the aryl halide to be added to the reaction system. Taking into consideration the post treatment operation after completion of the reaction, it is particularly preferably within a range of from 1 to 5 mols per mol of the halogen atoms of the aryl halide.
- the polymer thus obtained may vary depending upon the conditions such as the starting materials, their charged ratio, etc.
- halogen or secondary amine terminal moieties derived from the starting materials shown in the above reaction formulae will be mainly present.
- a hole injecting material for e.g. an organic EL element there will be a problem of the remaining halogen or thermal instability, whereby from the viewpoint of the useful life, it is not suitable for use for a long period of time. Therefore, an arylamine represented by the formula (21) and/or an aryl halide represented by the formula (22) is further reacted to prepare a polymer having improved stability.
- the arylamine represented by the formula (21) to be used in the process of the present invention is not particularly limited. Specifically, however, it may, for example, be diphenylamine, di-p-tolylamine, N-phenyl-1-naphthylamine or N-phenyl-2-naphthylamine.
- the aryl halide represented by the above formula (22) to be used in the process of the present invention is not particularly limited. Specifically, however, it may, for example, be an unsubstituted or substituted bromobenzene (such as bromobenzene, 2-bromotoluene, 3-bromotoluene, 4-bromotoluene, 2-bromo-m-xylene, 2-bromo-p-xylene, 3-bromo-o-xylene, 4-bromo-o-xylene, 4-bromo-m-xylene, 5-bromo-m-xylene, 1-bromo-2-ethylbenzene, 1-bromo-4-ethylbenzene, 1-bromo-4-propylbenzene, 1-bromo-4-n-butylbenzene, 1-bromo-4-t-butylbenzene, 1-bromo-5-(trifluoromethoxy)benzene, 2-bromoanisole, 3-
- the arylamine represented by the above formula (21) and/or the aryl halide represented by the formula (22) may be added and reacted after preparing the triarylamine polymer represented by the above formula (19) or (20), or may be directly added into the reactor and reacted during the process for preparing the triarylamine polymer.
- it is added into the reactor after a certain time and sequentially added for reaction.
- the amount of the arylamine represented by the above formula (21) and/or the arylamine halide represented by the formula (22) may vary depending upon the molecular weight of the triarylamine polymer to be used for the reaction or the polymerization reaction conditions and is not particularly limited. However, in the case where it is directly added during the polymerization reaction, it is preferably added in a proportion of from 0.01 to 0.8 mol, more preferably from 0.1 to 0.5 mol, per mol of the arylene dihalide as the starting material.
- the reaction is proceeded in the presence of the same base and catalyst comprising a trialkylphosphine and/or an arylphosphine and palladium compound, as used for the polymerization of the triarylamine polymer represented by the above formula (19) or (20).
- the amounts of the base and the palladium compound, the trialkylphosphine and/or the arylphosphine to be used as the catalyst vary depending upon the molecular weight of the triarylamine polymer to be used for the reaction and accordingly are not limited. However, for example, in a case where the arylamine and/or the aryl halide is directly added during the polymerization reaction, it is unnecessary to add the palladium compound, whereby the process can be simplified.
- the production of the triarylamine polymer of the present invention is usually preferably carried out in the presence of an inert solvent.
- the solvent to be used is not particularly limited so long as it is a solvent which does not substantially hinder the present invention.
- an aromatic hydrocarbon solvent such as benzene, toluene or xylene
- an ether solvent such as diethyl ether, tetrahydrofuran or dioxane, acetonitrile, dimethylformamide, dimethylsulfoxide or hexamethylphosphotriamide
- an aromatic hydrocarbon solvent such as benzene, toluene or xylene.
- the production of the triarylamine of the present invention is preferably carried out under an atmospheric pressure in an atmosphere of an inert gas such as nitrogen or argon, but may be carried out under an elevated pressure condition.
- the reaction temperature is not particularly limited so long as it is a reaction temperature at which the triarylamine can be produced. However, it is usually within a range of from 20 to 300° C., preferably from 50 to 200° C., more preferably from 100 to 150° C.
- the reaction time varies depending upon the triarylamine polymer to be produced and is not particularly limited. However, in many cases, it may be selected within a range of from a few minutes to 72 hours, preferably less than 24 hours.
- the triarylamine polymer of the present invention may be used as an electroconductive polymer material in an electron element such as a field effect transistor, a photonic device, a dye-sensitized solar cell or an organic electroluminescence element. Particularly, it is very useful as a hole transport material, a light emitting material or a buffer material for an organic electroluminescence element.
- the organic EL element of the present invention is not particularly limited with respect to the structure of the element, so long as it is provided with an organic layer containing the above polymer material.
- the triarylamine polymer of the present invention is excellent in solubility. Accordingly, by using a solution, a mixed liquid or a molten liquid of such a material, the above element can simply be prepared by a conventional coating method such as a spin coating method, a casting method, a dipping method, a bar coating method or a roll coating method. Further, it can easily be prepared also by an inkjet method, a Langmuir-Blodgett method or the like.
- this reaction mixture was cooled to about 80° C. and then slowly added to a stirred solution of a 90% acetone aqueous solution (200 ml). A solid was recovered by filtration, then washed sequentially with acetone, water and acetone, followed by drying under reduced pressure to obtain a slightly yellow powder (96%).
- the obtained powder was measured by an elemental analysis and an infrared spectroscopic analysis, whereby it was confirmed to be a triarylamine polymer represented by the following formula (23).
- the results of measurement by the elemental analysis and the infrared spectroscopic analysis are shown in Table 1 and FIG. 1 , respectively.
- the obtained polymer was analyzed by THF type GPC (HLC-8220, manufactured by Tosoh Corporation; column: G4000H XL -G3000H XL -G2000H XL -G2000H XL (all manufactured by Tosoh Corporation)), whereby as calculated as polystyrene, the weight-average molecular weight was 9,700, and the number-average molecular weight was 5,800 (polydispersity index (PDI): 1.7).
- the glass transition temperature was 171° C. TABLE 1 (23) C H N Measured value (wt %) 87.9 6.9 4.2 Theoretical value (wt %) 88.2 7.1 4.7
- a yellow powder was obtained by carrying out the operation in accordance with the method disclosed in Example 1 except that in Example 1, instead of 4.06 g (10 mmol) of 4,4′-diiodobiphenyl, 3.52 g (10 mmol) of 2,7 -dibromo-9,9′-dimethylfluorene was used.
- the obtained powder was measured by an infrared spectroscopic analysis, whereby it was confirmed to be a triarylamine polymer represented by the following formula (25). The results of measurement of the infrared spectroscopic analysis are shown in FIG. 3 .
- the obtained polymer was analyzed by THF type GPC (HLC-8220, manufactured by Tosoh Corporation), whereby as calculated as polystyrene, the weight-average molecular weight was 9,800, and the number-average molecular weight was 6,000 (PDI: 1.6).
- the glass transition temperature was 188° C.
- a yellow powder was obtained by carrying out the operation in accordance with the method disclosed in Comparative Example 1 except that in Comparative Example 1, instead of 4.06 g (10 mmol) of 4,4′-diiodobiphenyl, 3.52 g (10 mmol) of 2,7-dibromo-9,9′-dimethylfluorene was used.
- the obtained powder was measured by an elemental analysis and an infrared spectroscopic analysis, whereby it was confirmed to be a triarylamine polymer represented by the following formula (26). The results of measurement of the infrared spectroscopic analysis are shown in FIG. 4 .
- the obtained polymer was analyzed by THF type GPC (HLC-8220, manufactured by Tosoh Corporation), whereby as calculated as polystyrene, the weight-average molecular weight was 10,200, and the number-average molecular weight was 6,200 (PDI: 1.6).
- the glass transition temperature was 179° C.
- a reaction was carried out for three hours with stirring under heating at 120° C. in accordance with the specification disclosed in Comparative Example 1 except that in Comparative Example 1, the charged amount of 4-n-butylaniline was changed from 1.64 g (11 mmol) to 1.49 g (10 mmol). Three hours later, 47 mg (0.3 mmol) of bromobenzene was added, followed by stirring for further two hours. Then, 85 mg (0.5 mmol) of diphenylamine was added, followed by stirring for further two hours. After completion of the reaction, this reaction mixture was cooled to about 80° C., and then slowly added to a stirred solution of a 90% acetone aqueous solution (200 ml).
- Example 2 A solid was recovered by filtration, washed sequentially with acetone, water and acetone and then dried under reduced pressure to obtain a slightly yellow powder (96%).
- the infrared spectroscopic analysis of the obtained powder was the same as the result obtained in Example 1.
- the obtained polymer was analyzed by THF type GPC (HLC-8220, manufactured by Tosoh Corporation), whereby as calculated as polystyrene, the weight-average molecular weight was 65,100, and the number-average molecular weight was 20,200 (PDI: 3.2).
- a yellow powder was obtained by carrying out the operation in accordance with the method disclosed in Example 1 except that in Example 1, instead of 4.06 g (10 mmol) of 4,4′-diiodobiphenyl, 5.5 g (10 mmol) of 2,7-dibromo-9,9′-dioctylfluorene was used, and instead of 1.64 g (11 mmol) of 4-n-butylaniline, 1.02 g (11 mmol) of aniline was used.
- the obtained powder was measured by an infrared spectroscopic analysis, whereby it was confirmed to be a triarylamine polymer represented by the following formula (27).
- the obtained polymer was analyzed by THF type GPC (HLC-8220, manufactured by Tosoh Corporation), whereby as calculated as polystyrene, the weight-average molecular weight was 9,800, and the number-average molecular weight was 6,000 (PDI: 1.6).
- a yellow powder was obtained by carrying out the operation in accordance with the method disclosed in Example 3 except that in Example 4, instead of 1.02 g (11 mmol) of aniline, 2.66 g (10 mmol) of N,N′-diphenylphenylenediamine was used.
- the obtained powder was measured by an infrared spectroscopic analysis, whereby it was confirmed to be a triarylamine polymer represented by the following formula (28). Further, the obtained polymer was analyzed by GPC (HLC-8220, manufactured by Tosoh Corporation), whereby as calculated as polystyrene, the weight-average molecular weight was 19,000, and the number-average molecular weight was 9,200 (PDI: 2.1).
- a yellow powder was obtained by carrying out the operation in accordance with the method disclosed in Example 1 except that in Example 4, instead of 1.02 g (11 mmol) of aniline, 3.7 g (11 mmol) of N,N′-diphenylbenzidine was used.
- the obtained powder was measured by an infrared spectroscopic analysis, whereby it was confirmed to be a triarylamine polymer represented by the following formula (29). Further, the obtained polymer was analyzed by GPC (HLC-8220, manufactured by Tosoh Corporation), whereby as calculated as polystyrene, the weight-average molecular weight was 16,000, and the number-average molecular weight was 7,600 (PDI: 2.1).
- Example 4 An orange color powder was obtained by carrying out the operation in accordance with the method disclosed in Example 1 except that in Example 4, instead of 1.02 g (11 mmol) of aniline, 3.6 g (10 mmol) of N,N′-diphenyl-9,10-anthracenediamine was used.
- the obtained powder was measured by an infrared spectroscopic analysis, whereby it was confirmed to be a triarylamine polymer represented by the following formula (30). Further, the obtained polymer was analyzed by GPC (HLC-8220, manufactured by Tosoh Corporation), whereby as calculated as polystyrene, the weight-average molecular weight was 8,300, and the number-average molecular weight was 4,300 (PDI: 1.9).
- the triarylamine polymers (23) and (24) prepared in Example 1 and Comparative Example 1 were heated in an electric furnace at 230° C. in a nitrogen stream. With respect to the appearance of the polymers after the heating, the color change was more with the polymer (24). They were formed into 0.1% solutions, and APHA was compared between before heating and after heating by a color difference meter (ZE2000, manufactured by Nippon Denshoku K.K.), and the results are shown in Table 3. TABLE 3 APHA Before After heating heating heating Polymer (23) 230 260 Polymer (24) 235 320
- Example 9 An element was prepared in the same manner as in Example 9 except that in Example 9, instead of the polymer (23), the polymer (24) prepared in Comparative Example 1 was used.
- the emission characteristics are shown in Table 4.
- Example 9 An element was prepared in the same manner as in Example 9 except that in Example 9, no film of the polymer (23) was formed on the ITO glass substrate.
- the emission characteristics are shown in Table 4. TABLE 4 Luminous Current Turn-on efficiency efficiency voltage (V) (lm/w) (cd/A) Ex. 9 (23) 3 2.8 2.7 Comp. Ex. 3 (24) 3 2.2 2.1 Comp. Ex. 4 3 0.02 0.02
- an EL device employing a polymer having the terminals subjected to cap treatment can be driven at a lower voltage, and its heat resistance is improved. Accordingly, it is evident that a still larger superiority will be obtained when it is used for a long period of time.
- the present invention provides a novel triarylamine polymer having repeating structural units wherein tertiary arylamino groups are continuously present to the terminals, an efficient process for its production and its use.
- the novel triarylamine polymer of the present invention is not only excellent in solubility but also excellent in storage stability and heat resistance with minimum discoloration and thus has excellent film-forming properties and stability. With respect to its applications, it is not only useful as a hole transport material, a light emitting material or a buffer material for an organic EL element but also very useful as an electroconductive polymer to be used for an electron element such as a field effect transistor, a photonic device or a dye-sensitized solar cell. Thus, the present invention is industrially very significant.
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EP (2) | EP2327739B1 (ko) |
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US20110253985A1 (en) * | 2009-10-19 | 2011-10-20 | E. I. Du Pont De Nemours And Company | Triarylamine compounds for electronic applications |
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- 2003-08-07 KR KR1020047003999A patent/KR101014837B1/ko active IP Right Grant
- 2003-08-08 TW TW092121900A patent/TWI276675B/zh not_active IP Right Cessation
-
2006
- 2006-06-29 US US11/476,669 patent/US7608680B2/en not_active Expired - Lifetime
Patent Citations (4)
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US5728801A (en) * | 1996-08-13 | 1998-03-17 | The Dow Chemical Company | Poly (arylamines) and films thereof |
US6034206A (en) * | 1997-05-09 | 2000-03-07 | Tosoh Corporation | Polyaryleneamines and a process for their production |
US6084176A (en) * | 1997-09-05 | 2000-07-04 | Fuji Photo Film Co., Ltd. | Photoelectric conversion device and solar cell |
US6630566B1 (en) * | 1997-12-19 | 2003-10-07 | Avecia Limited | Polymeric material comprising N, P, S, As, or Se and composition for charge transport material |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090295275A1 (en) * | 2005-09-12 | 2009-12-03 | Merck Patent Gmbh | Compounds for organic electronic devices |
US8932731B2 (en) * | 2005-09-12 | 2015-01-13 | Merck Patent Gmbh | Compounds for organic electronic devices |
US20110077373A1 (en) * | 2009-09-29 | 2011-03-31 | General Electric Company | Polymer and optoelectronic device comprising the same |
US20110253985A1 (en) * | 2009-10-19 | 2011-10-20 | E. I. Du Pont De Nemours And Company | Triarylamine compounds for electronic applications |
US8648333B2 (en) * | 2009-10-19 | 2014-02-11 | E I Du Pont De Nemours And Company | Triarylamine compounds for use in organic light-emitting diodes |
Also Published As
Publication number | Publication date |
---|---|
AU2003254864A1 (en) | 2004-02-25 |
KR101014837B1 (ko) | 2011-02-15 |
US7608680B2 (en) | 2009-10-27 |
TW200406481A (en) | 2004-05-01 |
EP2327739A1 (en) | 2011-06-01 |
US20040262574A1 (en) | 2004-12-30 |
KR20050026687A (ko) | 2005-03-15 |
EP1528074A1 (en) | 2005-05-04 |
TWI276675B (en) | 2007-03-21 |
US20060241278A1 (en) | 2006-10-26 |
EP1528074A4 (en) | 2010-07-07 |
EP1528074B1 (en) | 2014-03-26 |
WO2004014985A1 (ja) | 2004-02-19 |
EP2327739B1 (en) | 2014-05-07 |
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