WO2013061805A1 - 新規なトリフェニレン誘導体及び該誘導体が使用されている有機エレクトロルミネッセンス素子 - Google Patents
新規なトリフェニレン誘導体及び該誘導体が使用されている有機エレクトロルミネッセンス素子 Download PDFInfo
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- WO2013061805A1 WO2013061805A1 PCT/JP2012/076434 JP2012076434W WO2013061805A1 WO 2013061805 A1 WO2013061805 A1 WO 2013061805A1 JP 2012076434 W JP2012076434 W JP 2012076434W WO 2013061805 A1 WO2013061805 A1 WO 2013061805A1
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- compound
- triphenylene
- organic
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- 125000005580 triphenylene group Chemical group 0.000 title claims abstract description 66
- 230000005525 hole transport Effects 0.000 claims abstract description 68
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 239000010410 layer Substances 0.000 claims description 159
- 239000012044 organic layer Substances 0.000 claims description 40
- 125000001424 substituent group Chemical group 0.000 claims description 31
- 230000000903 blocking effect Effects 0.000 claims description 27
- 125000006615 aromatic heterocyclic group Chemical group 0.000 claims description 23
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 20
- 125000004432 carbon atom Chemical group C* 0.000 claims description 18
- 229910052717 sulfur Inorganic materials 0.000 claims description 16
- 238000005401 electroluminescence Methods 0.000 claims description 13
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 12
- 125000004434 sulfur atom Chemical group 0.000 claims description 12
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 claims description 11
- 125000000217 alkyl group Chemical group 0.000 claims description 8
- 125000003545 alkoxy group Chemical group 0.000 claims description 7
- 125000000000 cycloalkoxy group Chemical group 0.000 claims description 6
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 6
- 125000004104 aryloxy group Chemical group 0.000 claims description 5
- 229910052801 chlorine Inorganic materials 0.000 claims description 5
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 5
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 5
- 229910052805 deuterium Inorganic materials 0.000 claims description 5
- 125000004431 deuterium atom Chemical group 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 5
- 125000001153 fluoro group Chemical group F* 0.000 claims description 5
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 4
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 abstract description 129
- -1 aromatic tertiary amine Chemical class 0.000 abstract description 107
- 125000003118 aryl group Chemical group 0.000 abstract description 13
- 239000010409 thin film Substances 0.000 abstract description 11
- 239000000126 substance Substances 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 159
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 74
- 239000000463 material Substances 0.000 description 64
- 238000005160 1H NMR spectroscopy Methods 0.000 description 48
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 45
- 239000011799 hole material Substances 0.000 description 44
- 230000015572 biosynthetic process Effects 0.000 description 33
- 239000012043 crude product Substances 0.000 description 32
- 238000003786 synthesis reaction Methods 0.000 description 32
- 239000000843 powder Substances 0.000 description 31
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 30
- 239000010408 film Substances 0.000 description 26
- 239000000203 mixture Substances 0.000 description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 22
- 239000012046 mixed solvent Substances 0.000 description 18
- 238000005481 NMR spectroscopy Methods 0.000 description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 17
- 239000000741 silica gel Substances 0.000 description 17
- 229910002027 silica gel Inorganic materials 0.000 description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 229910001873 dinitrogen Inorganic materials 0.000 description 16
- 229910052739 hydrogen Inorganic materials 0.000 description 16
- 239000001257 hydrogen Substances 0.000 description 16
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 16
- 230000001678 irradiating effect Effects 0.000 description 16
- 238000005259 measurement Methods 0.000 description 16
- 239000012299 nitrogen atmosphere Substances 0.000 description 16
- 238000010992 reflux Methods 0.000 description 16
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 15
- 239000000758 substrate Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 12
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 12
- 238000002425 crystallisation Methods 0.000 description 12
- 230000008025 crystallization Effects 0.000 description 12
- 239000007788 liquid Substances 0.000 description 12
- 238000000926 separation method Methods 0.000 description 12
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 11
- 238000004440 column chromatography Methods 0.000 description 9
- 238000000746 purification Methods 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 9
- 238000005406 washing Methods 0.000 description 9
- 239000003480 eluent Substances 0.000 description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- OJRUSAPKCPIVBY-KQYNXXCUSA-N C1=NC2=C(N=C(N=C2N1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(CP(=O)(O)O)O)O)O)I)N Chemical compound C1=NC2=C(N=C(N=C2N1[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(CP(=O)(O)O)O)O)O)I)N OJRUSAPKCPIVBY-KQYNXXCUSA-N 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 5
- SLGBZMMZGDRARJ-UHFFFAOYSA-N Triphenylene Natural products C1=CC=C2C3=CC=CC=C3C3=CC=CC=C3C2=C1 SLGBZMMZGDRARJ-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 150000004982 aromatic amines Chemical class 0.000 description 5
- 229940125758 compound 15 Drugs 0.000 description 5
- 230000009477 glass transition Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 125000001624 naphthyl group Chemical group 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 5
- YQOLEILXOBUDMU-KRWDZBQOSA-N (4R)-5-[(6-bromo-3-methyl-2-pyrrolidin-1-ylquinoline-4-carbonyl)amino]-4-(2-chlorophenyl)pentanoic acid Chemical compound CC1=C(C2=C(C=CC(=C2)Br)N=C1N3CCCC3)C(=O)NC[C@H](CCC(=O)O)C4=CC=CC=C4Cl YQOLEILXOBUDMU-KRWDZBQOSA-N 0.000 description 4
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 description 4
- WGFNXGPBPIJYLI-UHFFFAOYSA-N 2,6-difluoro-3-[(3-fluorophenyl)sulfonylamino]-n-(3-methoxy-1h-pyrazolo[3,4-b]pyridin-5-yl)benzamide Chemical compound C1=C2C(OC)=NNC2=NC=C1NC(=O)C(C=1F)=C(F)C=CC=1NS(=O)(=O)C1=CC=CC(F)=C1 WGFNXGPBPIJYLI-UHFFFAOYSA-N 0.000 description 4
- QEBYEVQKHRUYPE-UHFFFAOYSA-N 2-(2-chlorophenyl)-5-[(1-methylpyrazol-3-yl)methyl]-4-[[methyl(pyridin-3-ylmethyl)amino]methyl]-1h-pyrazolo[4,3-c]pyridine-3,6-dione Chemical compound C1=CN(C)N=C1CN1C(=O)C=C2NN(C=3C(=CC=CC=3)Cl)C(=O)C2=C1CN(C)CC1=CC=CN=C1 QEBYEVQKHRUYPE-UHFFFAOYSA-N 0.000 description 4
- DFRAKBCRUYUFNT-UHFFFAOYSA-N 3,8-dicyclohexyl-2,4,7,9-tetrahydro-[1,3]oxazino[5,6-h][1,3]benzoxazine Chemical compound C1CCCCC1N1CC(C=CC2=C3OCN(C2)C2CCCCC2)=C3OC1 DFRAKBCRUYUFNT-UHFFFAOYSA-N 0.000 description 4
- VKLKXFOZNHEBSW-UHFFFAOYSA-N 5-[[3-[(4-morpholin-4-ylbenzoyl)amino]phenyl]methoxy]pyridine-3-carboxamide Chemical compound O1CCN(CC1)C1=CC=C(C(=O)NC=2C=C(COC=3C=NC=C(C(=O)N)C=3)C=CC=2)C=C1 VKLKXFOZNHEBSW-UHFFFAOYSA-N 0.000 description 4
- RSIWALKZYXPAGW-NSHDSACASA-N 6-(3-fluorophenyl)-3-methyl-7-[(1s)-1-(7h-purin-6-ylamino)ethyl]-[1,3]thiazolo[3,2-a]pyrimidin-5-one Chemical compound C=1([C@@H](NC=2C=3N=CNC=3N=CN=2)C)N=C2SC=C(C)N2C(=O)C=1C1=CC=CC(F)=C1 RSIWALKZYXPAGW-NSHDSACASA-N 0.000 description 4
- GDUANFXPOZTYKS-UHFFFAOYSA-N 6-bromo-8-[(2,6-difluoro-4-methoxybenzoyl)amino]-4-oxochromene-2-carboxylic acid Chemical compound FC1=CC(OC)=CC(F)=C1C(=O)NC1=CC(Br)=CC2=C1OC(C(O)=O)=CC2=O GDUANFXPOZTYKS-UHFFFAOYSA-N 0.000 description 4
- XASOHFCUIQARJT-UHFFFAOYSA-N 8-methoxy-6-[7-(2-morpholin-4-ylethoxy)imidazo[1,2-a]pyridin-3-yl]-2-(2,2,2-trifluoroethyl)-3,4-dihydroisoquinolin-1-one Chemical compound C(N1C(=O)C2=C(OC)C=C(C=3N4C(=NC=3)C=C(C=C4)OCCN3CCOCC3)C=C2CC1)C(F)(F)F XASOHFCUIQARJT-UHFFFAOYSA-N 0.000 description 4
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 125000001164 benzothiazolyl group Chemical group S1C(=NC2=C1C=CC=C2)* 0.000 description 4
- 229940125844 compound 46 Drugs 0.000 description 4
- TXCDCPKCNAJMEE-UHFFFAOYSA-N dibenzofuran Chemical compound C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 description 4
- 125000004988 dibenzothienyl group Chemical group C1(=CC=CC=2SC3=C(C21)C=CC=C3)* 0.000 description 4
- IYYZUPMFVPLQIF-UHFFFAOYSA-N dibenzothiophene Chemical compound C1=CC=C2C3=CC=CC=C3SC2=C1 IYYZUPMFVPLQIF-UHFFFAOYSA-N 0.000 description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 4
- 239000007772 electrode material Substances 0.000 description 4
- NJSUFZNXBBXAAC-UHFFFAOYSA-N ethanol;toluene Chemical compound CCO.CC1=CC=CC=C1 NJSUFZNXBBXAAC-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 4
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 4
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
- YGBMCLDVRUGXOV-UHFFFAOYSA-N n-[6-[6-chloro-5-[(4-fluorophenyl)sulfonylamino]pyridin-3-yl]-1,3-benzothiazol-2-yl]acetamide Chemical compound C1=C2SC(NC(=O)C)=NC2=CC=C1C(C=1)=CN=C(Cl)C=1NS(=O)(=O)C1=CC=C(F)C=C1 YGBMCLDVRUGXOV-UHFFFAOYSA-N 0.000 description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 3
- QBYJBZPUGVGKQQ-SJJAEHHWSA-N aldrin Chemical compound C1[C@H]2C=C[C@@H]1[C@H]1[C@@](C3(Cl)Cl)(Cl)C(Cl)=C(Cl)[C@@]3(Cl)[C@H]12 QBYJBZPUGVGKQQ-SJJAEHHWSA-N 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 125000000499 benzofuranyl group Chemical group O1C(=CC2=C1C=CC=C2)* 0.000 description 3
- 125000004196 benzothienyl group Chemical group S1C(=CC2=C1C=CC=C2)* 0.000 description 3
- 125000004541 benzoxazolyl group Chemical group O1C(=NC2=C1C=CC=C2)* 0.000 description 3
- 150000001716 carbazoles Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 125000002541 furyl group Chemical group 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 125000004076 pyridyl group Chemical group 0.000 description 3
- 150000004322 quinolinols Chemical class 0.000 description 3
- 125000005493 quinolyl group Chemical group 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- 125000001544 thienyl group Chemical group 0.000 description 3
- 125000005259 triarylamine group Chemical group 0.000 description 3
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical compound C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 2
- AWXGSYPUMWKTBR-UHFFFAOYSA-N 4-carbazol-9-yl-n,n-bis(4-carbazol-9-ylphenyl)aniline Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(N(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 AWXGSYPUMWKTBR-UHFFFAOYSA-N 0.000 description 2
- ZOKIJILZFXPFTO-UHFFFAOYSA-N 4-methyl-n-[4-[1-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C1(CCCCC1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 ZOKIJILZFXPFTO-UHFFFAOYSA-N 0.000 description 2
- VFUDMQLBKNMONU-UHFFFAOYSA-N 9-[4-(4-carbazol-9-ylphenyl)phenyl]carbazole Chemical group C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 VFUDMQLBKNMONU-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- 0 C*(C)*(C)*N([Al]*)[Al](C)I Chemical compound C*(C)*(C)*N([Al]*)[Al](C)I 0.000 description 2
- 101000837344 Homo sapiens T-cell leukemia translocation-altered gene protein Proteins 0.000 description 2
- POFVJRKJJBFPII-UHFFFAOYSA-N N-cyclopentyl-5-[2-[[5-[(4-ethylpiperazin-1-yl)methyl]pyridin-2-yl]amino]-5-fluoropyrimidin-4-yl]-4-methyl-1,3-thiazol-2-amine Chemical compound C1(CCCC1)NC=1SC(=C(N=1)C)C1=NC(=NC=C1F)NC1=NC=C(C=C1)CN1CCN(CC1)CC POFVJRKJJBFPII-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 102100028692 T-cell leukemia translocation-altered gene protein Human genes 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- HXGDTGSAIMULJN-UHFFFAOYSA-N acenaphthylene Chemical compound C1=CC(C=C2)=C3C2=CC=CC3=C1 HXGDTGSAIMULJN-UHFFFAOYSA-N 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 description 2
- RFRXIWQYSOIBDI-UHFFFAOYSA-N benzarone Chemical compound CCC=1OC2=CC=CC=C2C=1C(=O)C1=CC=C(O)C=C1 RFRXIWQYSOIBDI-UHFFFAOYSA-N 0.000 description 2
- 125000003785 benzimidazolyl group Chemical group N1=C(NC2=C1C=CC=C2)* 0.000 description 2
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 239000004305 biphenyl Substances 0.000 description 2
- 235000010290 biphenyl Nutrition 0.000 description 2
- UFVXQDWNSAGPHN-UHFFFAOYSA-K bis[(2-methylquinolin-8-yl)oxy]-(4-phenylphenoxy)alumane Chemical compound [Al+3].C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC([O-])=CC=C1C1=CC=CC=C1 UFVXQDWNSAGPHN-UHFFFAOYSA-K 0.000 description 2
- ZADPBFCGQRWHPN-UHFFFAOYSA-N boronic acid Chemical compound OBO ZADPBFCGQRWHPN-UHFFFAOYSA-N 0.000 description 2
- XJHCXCQVJFPJIK-UHFFFAOYSA-M caesium fluoride Chemical compound [F-].[Cs+] XJHCXCQVJFPJIK-UHFFFAOYSA-M 0.000 description 2
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 description 2
- 125000004623 carbolinyl group Chemical group 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001721 carbon Chemical group 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 125000003914 fluoranthenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC=C4C1=C23)* 0.000 description 2
- PQNFLJBBNBOBRQ-UHFFFAOYSA-N indane Chemical compound C1=CC=C2CCCC2=C1 PQNFLJBBNBOBRQ-UHFFFAOYSA-N 0.000 description 2
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- 239000010931 gold Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- SJCKRGFTWFGHGZ-UHFFFAOYSA-N magnesium silver Chemical compound [Mg].[Ag] SJCKRGFTWFGHGZ-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
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- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001298 n-hexoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000003935 n-pentoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004923 naphthylmethyl group Chemical group C1(=CC=CC2=CC=CC=C12)C* 0.000 description 1
- 125000005186 naphthyloxy group Chemical group C1(=CC=CC2=CC=CC=C12)O* 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000007978 oxazole derivatives Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 1
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- XEXYATIPBLUGSF-UHFFFAOYSA-N phenanthro[9,10-b]pyridine-2,3,4,5,6,7-hexacarbonitrile Chemical group N1=C(C#N)C(C#N)=C(C#N)C2=C(C(C#N)=C(C(C#N)=C3)C#N)C3=C(C=CC=C3)C3=C21 XEXYATIPBLUGSF-UHFFFAOYSA-N 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 150000003220 pyrenes Chemical class 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 150000003252 quinoxalines Chemical class 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical class [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- YYMBJDOZVAITBP-UHFFFAOYSA-N rubrene Chemical compound C1=CC=CC=C1C(C1=C(C=2C=CC=CC=2)C2=CC=CC=C2C(C=2C=CC=CC=2)=C11)=C(C=CC=C2)C2=C1C1=CC=CC=C1 YYMBJDOZVAITBP-UHFFFAOYSA-N 0.000 description 1
- 150000003967 siloles Chemical class 0.000 description 1
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 150000004867 thiadiazoles Chemical class 0.000 description 1
- 150000007979 thiazole derivatives Chemical class 0.000 description 1
- 150000001651 triphenylamine derivatives Chemical class 0.000 description 1
- 125000006617 triphenylamine group Chemical group 0.000 description 1
- 150000003643 triphenylenes Chemical group 0.000 description 1
- BWHDROKFUHTORW-UHFFFAOYSA-N tritert-butylphosphane Chemical compound CC(C)(C)P(C(C)(C)C)C(C)(C)C BWHDROKFUHTORW-UHFFFAOYSA-N 0.000 description 1
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Definitions
- the present invention relates to a novel compound (triphenylene derivative) suitable for an organic electroluminescence element which is a self-luminous element suitable for various display devices, and an organic electroluminescence element comprising an organic layer containing the compound.
- organic electroluminescence elements (hereinafter sometimes referred to as organic EL elements) are self-luminous elements, they are brighter and more visible than liquid crystal elements, and can be clearly displayed. I came.
- organic electroluminescence elements using organic materials practical by developing a laminated structure element that shares various roles with each material. They consist of a stack of a phosphor capable of transporting electrons and an aromatic amine compound capable of transporting holes, and both charges are injected into the phosphor layer. By emitting light, high luminance of 1000 cd / m 2 or more can be obtained at a voltage of 10 V or less.
- an element having a structure in which various roles are further subdivided and an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode are sequentially provided on a substrate is known.
- Such an element achieves high efficiency and durability.
- the light emitting layer can also be prepared by doping a charge transporting compound generally called a host material with a phosphor or a phosphorescent light emitter.
- a charge transporting compound generally called a host material with a phosphor or a phosphorescent light emitter.
- an organic EL element charges injected from both electrodes recombine in the light emitting layer to emit light, but it is important to efficiently transfer both holes and electrons to the light emitting layer. For example, the probability of recombination of holes and electrons is improved by increasing the hole injection property and blocking the electron injected from the cathode, and further excitons generated in the light emitting layer. By confining, high luminous efficiency can be obtained. Therefore, the role of the hole transport material is important, and there is a demand for a hole transport material that has high hole injectability, high hole mobility, high electron blocking properties, and high durability against electrons. ing.
- the heat resistance and amorphous nature of the material are important for the lifetime of the element.
- thermal decomposition occurs even at a low temperature due to heat generated when the element is driven, and the material is deteriorated.
- the thin film is crystallized even in a short time, and the element is deteriorated. For this reason, the material used is required to have high heat resistance and good amorphous properties.
- NPD N, N′-diphenyl-N, N′-di ( ⁇ -naphthyl) benzidine
- Tg glass transition point
- Patent Document 1 and Patent Document 2 various aromatic amine derivatives
- the aromatic amine derivatives described in Patent Document 1 and Patent Document 2 there are those having an excellent mobility of hole mobility of 10 ⁇ 3 cm 2 / Vs or more, but the electron blocking property. Insufficient amount of electrons pass through the light-emitting layer, and improvement in luminous efficiency cannot be expected.For higher efficiency, electron blocking is higher, thin film is more stable and heat resistant High-quality materials were demanded.
- Patent Documents 3 and 4 propose arylamine compounds A and B having a substituted triphenylene structure represented by the following formula.
- JP-A-8-48656 Japanese Patent No. 3194657 WO2010 / 002850 publication WO2011 / 081423
- the present inventors have a high hole injection / transport capability of the aromatic tertiary amine structure, and the triphenylene ring structure has good heat resistance and thin film stability. Focusing on this, various compounds having a triphenylene ring structure were designed and chemically synthesized, and various organic electroluminescence devices were prototyped using the compounds. As a result, the present invention has been completed.
- a triphenylene derivative represented by the following general formula (1) is provided.
- p and q each represents 0 or an integer of 1 to 4;
- s represents 0 or an integer of 1 to 3;
- n represents 0 or an integer of 1 to 2,
- Ar 1 and Ar 2 each represent an aromatic hydrocarbon group or an aromatic heterocyclic group, and
- Ar 1 and Ar 2 are a single bond, a methyl group which may have a substituent, or an oxygen atom.
- R 1 , R 2 and R 3 are each a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, an alkyl group having 1 to 6 carbon atoms, or a carbon atom number of 5
- Each of A 1 and A 2 represents a divalent aromatic hydrocarbon group or a divalent aromatic heterocyclic group;
- a 1 and Ar 1 may be bonded to each other via a single bond, an optionally substituted methylene group, an oxygen atom or a sulfur atom to form a ring, When n is 1, A 1 or A 2 and
- n 2
- a 1 or A 2 and Ar 1 may have a single bond or a substituent methylene group And may be bonded to each other via an oxygen atom or a sulfur atom to form a ring.
- the organic electroluminescence device having a pair of electrodes and at least one organic layer sandwiched therebetween, At least one layer of the organic layer contains the triphenylene derivative, and an organic electroluminescence device is provided.
- the organic EL device of the present invention has, for example, a hole transport layer, an electron blocking layer, a hole injection layer, or a light emitting layer as the organic layer containing the triphenylene derivative.
- the triphenylene derivative of the present invention represented by the general formula (1) described above is a novel compound, and has a structure in which an aromatic tertiary amine is introduced into the triphenylene ring. And have the following characteristics.
- the triphenylene derivative of the present invention is useful as a hole transporting material used in an organic EL device and has a stable thin film state. Therefore, the triphenylene derivative is particularly used as an organic layer provided in the organic EL device.
- the following characteristics can be imparted to the element.
- an organic EL device in which a hole injection layer and / or a hole transport layer are formed using the triphenylene derivative of the present invention has a high hole injection / transfer rate, a high electron blocking property, and a high resistance to electrons. Since the stability is high, excitons generated in the light emitting layer can be confined, and further, the probability of recombination of holes and electrons is improved, and high luminous efficiency is exhibited. Further, the driving voltage is lowered, and the durability can be improved.
- the organic EL device having the electron blocking layer formed using the triphenylene derivative of the present invention has a high emission efficiency due to an excellent electron blocking ability and an excellent hole transport property, and a driving voltage is high. Low, current resistance is improved, and maximum light emission brightness is improved.
- the triphenylene derivative of the present invention has excellent hole transport properties and a wide band gap as compared with conventional materials, it can be used as a host material for a light-emitting layer.
- a fluorescent luminescent material or phosphorescent luminescent material called a dopant By supporting a fluorescent luminescent material or phosphorescent luminescent material called a dopant and using it as a luminescent layer, the driving voltage of the organic EL element can be lowered and the luminous efficiency can be improved.
- the triphenylene derivative of the present invention is extremely useful as a constituent material of the hole injection layer, the hole transport layer, the electron blocking layer, or the light emitting layer of the organic EL element, and improves the light emission efficiency and power efficiency of the organic EL element. It is possible to improve, lower the practical driving voltage, and increase the durability.
- the triphenylene derivative of the present invention is represented by the following general formula (1), and has a structure in which an aromatic tertiary amine is bonded to the triphenylene ring via a divalent group.
- p and q indicating the number of substituents R 1 and R 2 bonded to the triphenylene ring are each 0 or an integer of 1 to 4. Further, s indicating the number of substituents R 3 bonded to the triphenylene ring represents 0 or an integer of 1 to 3. Furthermore, n indicating the number of divalent groups A 2 existing between the nitrogen atom of the aromatic amine and the triphenylene ring represents 0 or an integer of 1 to 2.
- Ar 1 and Ar 2 bonded to a nitrogen atom each represent an aromatic hydrocarbon group or an aromatic heterocyclic group.
- Such an aromatic hydrocarbon group and aromatic heterocyclic group may have a monocyclic structure or may have a condensed polycyclic structure.
- aromatic groups include phenyl group, biphenylyl group, terphenylyl group, naphthyl group, anthryl group, phenanthryl group, fluorenyl group, indenyl group, pyrenyl group, perylenyl group, fluoranthenyl group, triphenylenyl group, pyridyl group.
- aromatic heterocyclic group examples include furanyl group, benzofuranyl group, benzoxazolyl group, and dibenzofuranyl group.
- the aromatic hydrocarbon group is preferably a phenyl group, a biphenylyl group, a naphthyl group, or a fluorenyl group.
- the above aromatic group may have a substituent.
- substituents include: deuterium atom; cyano group; nitro group; halogen atom such as fluorine atom, chlorine atom, bromine atom and iodine atom; methyl group, ethyl group, n-propyl group, isopropyl group, n- A linear or branched alkyl group having 1 to 6 carbon atoms such as butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group; methyloxy group, ethyloxy A linear or branched alkyloxy group having 1 to 6 carbon atoms such as a propyloxy group; an alkenyl group such as an allyl group; an aralkyl group such as a benzyl group, a naphthylmethyl group, and a phene
- the substituent of the aromatic group is preferably a linear or branched alkyl group having 1 to 6 carbon atoms, particularly preferably a methyl group or a tert-butyl group.
- Ar 1 and Ar 2 may be bonded to each other via a single bond, a methylene group which may have a substituent, an oxygen atom or a sulfur atom to form a ring.
- R 1 , R 2 and R 3 bonded to the triphenylene ring are each a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, or a C 1-6 carbon atom.
- the alkyl group having 1 to 6 carbon atoms may be linear or branched, and specific examples thereof include a methyl group, an ethyl group, and n-propyl.
- these alkyl groups may have a substituent, such as a deuterium atom; a fluorine atom, a chlorine atom, a cyano group, an aryl group (for example, a phenyl group, a naphthyl group, an anthryl group). , A fluorenyl group, a stil group, and the like), an aromatic heterocyclic group (such as a pyridyl group, a pyridoindolyl group, a quinolyl group, and a benzothiazolyl group).
- the alkyl group may be a group such as a trifluoromethyl group.
- cycloalkyl group having 5 to 10 carbon atoms the alkyloxy group having 1 to 6 carbon atoms, and the cycloalkyloxy group having 5 to 10 carbon atoms in R 1 to R 3 are all linear. It may be branched or branched, and specifically, the following can be exemplified. Examples of cycloalkyl groups; Cyclopentyl group, cyclohexyl group, 1-adamantyl group, 2-adamantyl group and the like.
- alkyloxy groups Methyloxy group, ethyloxy group, n-propyloxy group, isopropyloxy group, n-butyloxy group, tert-butyloxy group, n-pentyloxy group, n-hexyloxy group and the like.
- cycloalkyloxy groups Cyclopentyloxy group, cyclohexyloxy group, cycloheptyloxy group, cyclooctyloxy group, 1-adamantyloxy group and 2- Adamantyloxy group and the like.
- these cycloalkyl groups, alkyloxy groups, and cycloalkyloxy groups may also have a substituent. Examples of such substituents include the aromatic hydrocarbon group and the aromatic complex in Ar 1 and Ar 2 described above. The thing similar to the substituent which a cyclic group may have can be mentioned.
- aromatic hydrocarbon group and aromatic heterocyclic group in R 1 to R 3 are the same groups as those exemplified for Ar 1 and Ar 2 described above, and the same may be included in the substituent. is there.
- aryloxy group in R 1 to R 3 phenyloxy group, tolyloxy group, biphenylyloxy group, terphenylyloxy group, naphthyloxy group, anthryloxy group, phenanthryloxy group, fluorenyloxy group Indenyloxy group, pyrenyloxy group, perylenyloxy group and the like can be mentioned.
- these aryloxy groups may also have a substituent, and as such a substituent, the aromatic hydrocarbon group and the aromatic heterocyclic group in Ar 1 and Ar 2 may have a substituent. The same thing as a group can be mentioned.
- a 1 and A 2 each represent a divalent aromatic hydrocarbon group or a divalent aromatic heterocyclic group, and through these groups, a nitrogen atom of an aromatic amino group And the triphenylene ring are bonded.
- Such a divalent aromatic hydrocarbon group and aromatic heterocyclic group are not limited to a single ring, and may have a polycyclic structure in which a hydrocarbon ring or a heterocyclic ring is bonded.
- the divalent aromatic hydrocarbon group has an aromatic ring structure such as benzene, biphenyl, terphenyl, tetrakisphenyl, styrene, naphthalene, anthracene, acenaphthalene, fluorene, phenanthrene, indane, and pyrene.
- aromatic ring structure such as benzene, biphenyl, terphenyl, tetrakisphenyl, styrene, naphthalene, anthracene, acenaphthalene, fluorene, phenanthrene, indane, and pyrene.
- a divalent group having an aromatic ring structure having benzene, biphenyl, or fluorene is particularly preferred.
- Divalent aromatic heterocyclic groups include pyridine, pyrimidine, triazine, furan, pyran, thiophene, quinoline, isoquinoline, benzofuran, benzothiophene, indoline, carbazole, benzoxazole, benzothiazole, quinoxaline, benzimidazole, and pyrazole.
- each of the above divalent aromatic hydrocarbon group and divalent aromatic heterocyclic group may have a substituent, and examples of such a substituent include aromatic groups in Ar 1 and Ar 2 .
- substituent which an aromatic hydrocarbon group and an aromatic heterocyclic group may have can be mentioned.
- a 1 and Ar 1 when n representing the number of A 2 is 0 (that is, when there is no A 2 ), A 1 and Ar 1 have a single bond and a substituent. They may be bonded to each other via a methylene group, an oxygen atom or a sulfur atom to form a ring. When n is 1, A 1 or A 2 and Ar 1 are bonded to each other through a single bond, an optionally substituted methylene group, an oxygen atom or a sulfur atom to form a ring. May be. Further, when n is 2, a plurality of A 2 may be different from each other, and A 1 or A 2 and Ar 1 may have a single bond or a substituent. A ring may be formed by bonding to each other via a methylene group, an oxygen atom or a sulfur atom.
- triphenylene derivative is a novel compound and is synthesized, for example, as follows.
- triphenylene corresponding to the triphenylene ring possessed by the triphenylene derivative of the general formula (1) is used, and the site (for example, 2-position) to which the group A 1 of the triphenylene ring is bonded is brominated, and this bromine is converted into boronic acid or boronic acid. Conversion into an ester (see, for example, WO2010 / 002850).
- the boronic acid ester thus obtained and the bromo compound of the amine corresponding to the aromatic amine moiety of the triphenylene derivative of the general formula (1) are subjected to a cross coupling reaction such as Suzuki coupling (for example, Chem. Rev., 95, 2457 (1995)), the desired triphenylene derivative can be synthesized.
- the compound obtained can be purified by column chromatography, adsorption purification using silica gel, activated carbon, activated clay, etc., recrystallization or crystallization using a solvent, etc., and identification can be performed by NMR analysis. Is called.
- triphenylene derivative of the present invention those in which n in the general formula (1) is zero are preferable, and among them, the divalent group A 1 in the general formula (1) may have a substituent.
- a group (especially unsubstituted) is particularly preferred.
- Such a preferable triphenylene derivative is specifically represented by the following general formula (1a).
- the divalent group A 1 in the aforementioned general formula (1) is bonded to the 2-position of the triphenylene ring, specifically represented by the following general formula (1 ′). Those are also suitable. Where p, q, s, n, Ar 1 , Ar 2 , R 1 to R 3 , A 1 and A 2 have the same meanings as described in the general formula (1).
- Particularly preferred are good phenylene groups (especially unsubstituted ones).
- a suitable compound of this type is represented, for example, by the following general formula (b). Where p, q, s, Ar 1 , Ar 2 and R 1 to R 3 have the same meaning as described in the general formula (1).
- a phenylene group (corresponding to A 1 ) in which an aromatic amino group (—NAr 1 Ar 2 ) is bonded to the 2-position of the triphenylene ring. )
- a compound represented by the following general formula (1b-1) is preferable.
- p, q, s, Ar 1 , Ar 2 and R 1 to R 3 have the same meaning as described in the general formula (1).
- the above-described triphenylene derivative of the present invention has a glass transition point (Tg) and a melting point higher than those of conventionally known hole transport materials, can form a thin film with excellent heat resistance, and maintains an amorphous state stably. Therefore, the thin film state can be stably maintained.
- the electron blocking ability is high. For example, when the work function is measured by forming a deposited film having a thickness of 100 ⁇ m using the triphenylene derivative of the present invention, an extremely high value is shown. Therefore, the triphenylene derivative of the present invention is extremely useful as a material for forming an organic layer of an organic EL element.
- the organic EL element provided with the organic layer formed using the triphenylene derivative of the present invention described above has a layer structure shown in FIG. 17, for example. That is, a transparent anode 2, a hole injection layer 3, a hole transport layer 4, a light emitting layer 5, an electron transport layer 6, an electron injection on a glass substrate 1 (a transparent substrate such as a transparent resin substrate may be used). A layer 7 and a cathode 8 are provided.
- the organic EL element to which the triphenylene derivative of the present invention is applied is not limited to the above layer structure, and an electron blocking layer, a light emitting layer 5 and a hole transport layer 4 are disposed between the hole transport layer 4 and the light emitting layer 5.
- a hole blocking layer or the like can be provided between the electron transport layer 6 and a simple layer structure in which the electron injection layer 7 and the hole injection layer 3 are omitted can be obtained.
- some layers can be omitted.
- a simple layer structure in which the anode 2, the hole transport layer 3, the light emitting layer 4, the electron transport layer 6, and the cathode 8 are provided on the substrate 1 can be used.
- the benzotriazole derivative of the present invention has an organic layer (for example, a hole injection layer 3, a hole transport layer 4, an electron blocking layer not shown, or a light emitting layer) provided between the anode 2 and the cathode 8 described above. It is suitably used as a forming material of 4).
- an organic layer for example, a hole injection layer 3, a hole transport layer 4, an electron blocking layer not shown, or a light emitting layer
- the transparent anode 2 may be formed of a known electrode material, and an electrode material having a large work function such as ITO or gold is formed on the substrate 1 (transparent substrate such as a glass substrate). It is formed by vapor deposition.
- the hole injection layer 3 provided on the transparent electrode 2 can be formed using the above-described triphenylene derivative of the present invention, or a conventionally known material such as the following materials.
- Application-type polymer materials such as poly (3,4-ethylenedioxythiophene) (PEDOT), poly (styrene sulfonate) (PSS), etc .; Acceptor heterocyclic compounds such as hexacyanoazatriphenylene;
- Formation of a layer (thin film) using the above materials can be performed by a known method such as a spin coating method or an ink jet method in addition to a vapor deposition method. Similarly, various layers described below can be formed by vapor deposition, spin coating, ink jetting, or the like.
- the hole transport layer 4 provided on the hole injection layer 3 can also be formed using the above-described triphenylene derivative of the present invention, or can be formed using a conventionally known hole transport material. You can also. Typical examples of such conventionally known hole materials are as follows.
- Benzidine derivatives such as N, N′-diphenyl-N, N′-di (m-tolyl) benzidine (hereinafter abbreviated as TPD); N, N′-diphenyl-N, N′-di ( ⁇ -naphthyl) benzidine (hereinafter abbreviated as NPD); N, N, N ′, N′-tetrabiphenylylbenzidine; Amine derivatives such as 1,1-bis [4- (di-4-tolylamino) phenyl] Cyclohexane (hereinafter abbreviated as TAPC); Various triphenylamine trimers and tetramers; The above coating type polymer material that is also used for a hole injection layer;
- Such a compound of the hole transport material may be formed alone, but may be formed by mixing two or more kinds, or by using one or more of the above compounds.
- a multilayer film in which a plurality of layers are formed and in which such layers are stacked can be used as a hole transport layer.
- hole injection layer 3 and the hole transport layer 4 can also be used.
- a hole injection / transport layer is made of poly (3,4-ethylenedioxythiophene (hereinafter referred to as PEDOT). It can be formed by coating with a polymer material such as (abbreviated).
- the hole transport layer 4 (the same applies to the hole injection layer 3), it is possible to use a material which is usually used for the layer and further P-doped with trisbromophenylamine hexachloroantimony or the like.
- the hole transport layer 4 (or the hole injection layer 3) can be formed using a polymer compound having a basic skeleton of TPD.
- an electron blocking layer (not shown) (which can be provided between the light emitting layer 4 and the hole transport layer 3) can be formed using the triphenylene derivative of the present invention having an electron blocking action, It can also be formed using a known electron blocking compound such as a carbazole derivative or a compound having a triphenylsilyl group and a triarylamine structure. Specific examples of the compound having a carbazole derivative and a triarylamine structure are as follows.
- TCTA 9,9-bis [4- (carbazol-9-yl) phenyl] Fluorene
- mCP 1,3-bis (carbazol-9-yl) benzene
- Ad-Cz 2,2-bis (4-carbazol-9-ylphenyl) adamantane
- the electron blocking layer is formed using one or more of the triphenylene compound of the present invention and the above-described known hole transport materials alone or in combination of two or more of these hole transport materials.
- a plurality of layers can be used to form a multilayer film in which such layers are stacked as an electron blocking layer.
- the light-emitting layer 5 of the organic EL element is composed of various metal complexes such as zinc, beryllium, and aluminum, anthracene derivatives, bisstyrylbenzene derivatives, pyrene derivatives, oxazole derivatives, poly quinolinol derivatives and other metal complexes including Alq 3.
- a light-emitting material such as a paraphenylene vinylene derivative can be used.
- the light emitting layer 5 can also be comprised with a host material and a dopant material.
- a host material in this case, in addition to the above light emitting material, a thiazole derivative, a benzimidazole derivative, a polydialkylfluorene derivative, or the like can be used, and further, the above-described triphenylene derivative of the present invention can also be used.
- the dopant material quinacridone, coumarin, rubrene, perylene and derivatives thereof, benzopyran derivatives, rhodamine derivatives, aminostyryl derivatives, and the like can be used.
- Such a light-emitting layer 5 can also have a single-layer configuration using one or more of the light-emitting materials, or a multilayer structure in which a plurality of layers are stacked.
- the light emitting layer 4 can also be formed using a phosphorescent light emitting material as the light emitting material.
- a phosphorescent material a phosphorescent material of a metal complex such as iridium or platinum can be used.
- green phosphorescent emitters such as Ir (ppy) 3
- blue phosphorescent emitters such as FIrpic and FIr6
- red phosphorescent emitters such as Btp 2 Ir (acac)
- the material is used by doping into a hole injecting / transporting host material or an electron transporting host material.
- the triphenylene derivative of the present invention carbazole derivatives such as 4,4′-di (N-carbazolyl) biphenyl (hereinafter abbreviated as CBP), TCTA, and mCP are used. be able to.
- CBP 4,4′-di (N-carbazolyl) biphenyl
- TCTA 4,4′-di (N-carbazolyl) biphenyl
- mCP mCP
- an electron transporting host material p-bis (triphenylsilyl) benzene (hereinafter abbreviated as UGH2), 2,2 ′, 2 ′′-(1,3,5-phenylene) -tris ( 1-phenyl-1H-benzimidazole) (hereinafter abbreviated as TPBI) and the like can be used.
- the host material with a phosphorescent light emitting material by co-evaporation in the range of 1 to 30 weight percent with respect to the entire light emitting layer in order to avoid concentration quenching.
- a hole blocking layer (not shown in FIG. 17) that can be provided between the light emitting layer 5 and the electron transport layer 6 can be formed using a compound having a known hole blocking action.
- known compounds having such a hole blocking action include phenanthroline derivatives such as bathocuproin (hereinafter abbreviated as BCP), aluminum (III) bis (2-methyl-8-quinolinato) -4-phenylpheno
- BCP bathocuproin
- BAlq metal complexes of quinolinol derivatives
- triazole derivatives, triazine derivatives, oxadiazole derivatives, and the like can be given.
- These materials can also be used for forming the electron transport layer 6 described below, and the hole blocking layer and the electron transport layer 6 can be used in combination.
- Such a hole blocking layer can also have a single layer or multilayer structure, and each layer is formed using one or more of the compounds having the hole blocking action described above.
- the electron transport layer 6 is an electron transport compound known per se, for example, metal complexes of quinolinol derivatives such as Alq 3 and BAlq, as well as various metal complexes such as zinc, beryllium, and aluminum, triazole derivatives, and triazine derivatives. Oxadiazole derivatives, thiadiazole derivatives, carbodiimide derivatives, quinoxaline derivatives, phenanthroline derivatives, silole derivatives, and the like.
- the electron transport layer 6 can also have a single layer or multilayer structure, and each layer is formed using one or more of the electron transport compounds described above.
- the electron injection layer 7 is also known per se, for example, an alkali metal salt such as lithium fluoride or cesium fluoride, an alkaline earth metal salt such as magnesium fluoride, or a metal oxide such as aluminum oxide. Can be formed.
- an alkali metal salt such as lithium fluoride or cesium fluoride
- an alkaline earth metal salt such as magnesium fluoride
- a metal oxide such as aluminum oxide.
- an electrode material having a low work function such as aluminum, or an alloy having a lower work function such as a magnesium silver alloy, a magnesium indium alloy, or an aluminum magnesium alloy is used as the electrode material.
- the organic EL device in which at least one of the organic layers (for example, the hole injection layer 3, the hole transport layer 4, the electron blocking layer or the light emitting layer 5) is formed using the triphenylene derivative of the present invention has a luminous efficiency and power. It has high efficiency, low practical driving voltage, low light emission starting voltage, and extremely excellent durability.
- the mixture was allowed to cool to room temperature, 50 ml of water and 100 ml of toluene were added, and then the organic layer was collected by a liquid separation operation.
- the organic layer was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure to obtain an orange crude product.
- the crude product was purified by column chromatography (carrier: silica gel, eluent: cyclohexane / toluene), followed by crystallization with a mixed solvent of toluene / hexane, followed by reflux washing with methanol (4-tert.
- Tetrakis (triphenylphosphine) palladium 0.57g The mixture was heated and stirred at 68 ° C. for 8.5 hours. After allowing to cool to room temperature and adding 400 ml of water, the organic layer was collected by a liquid separation operation. The organic layer was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure to obtain a brown crude product.
- the crude product is purified by column chromatography (carrier: silica gel, eluent: hexane / toluene), followed by crystallization with a mixed solvent of toluene / hexane, followed by reflux washing with methanol (4′-tert -Butylbiphenyl-4-yl)-(9,9-dimethyl-9H-fluoren-2-yl)- ⁇ 4- (triphenylene-2-yl) phenyl ⁇ amine (compound 83) 12.8 g (white powder) Yield 71%).
- the mixture was allowed to cool to room temperature, 270 ml of water was added, and then the organic layer was collected by a liquid separation operation.
- the organic layer was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure to obtain a black crude product.
- the crude product was purified by column chromatography (carrier: silica gel, eluent: hexane / toluene), crystallized with a mixed solvent of toluene / hexane, and washed with refluxing with methanol to obtain (9,9-dimethyl-9H).
- Example 17 For the compounds (triphenylene derivatives) obtained in Examples 1 to 16, the melting point and glass transition point were determined by a high-sensitivity differential scanning calorimeter (manufactured by Bruker AXS, DSC3100S). The results were as follows. Melting point Glass transition point Compound of Example 1 257 ° C 116 ° C Compound of Example 2 236 ° C. 115 ° C. Compound of Example 3 160 ° C 131 ° C Compound of Example 4 Not determined. 129 ° C Compound of Example 5 236 ° C 116 ° C Compound of Example 6 Not determined. 115 ° C Compound of Example 7 Not determined. 134 ° C Compound of Example 8 245 ° C.
- the compounds of the present invention obtained in Examples 1 to 16 have a glass transition point as high as 95 ° C. or higher. From this, it can be seen that the thin film formed by the compound of the present invention is maintained stably.
- Example 18 Using the compounds of the present invention obtained in Examples 1 to 5, 8 to 12, and 14 to 16, a deposited film having a film thickness of 100 nm was prepared on an ITO substrate, and an atmospheric photoelectron spectrometer (manufactured by Riken Keiki Co., Ltd.). , AC-3 type). The results were as follows.
- the triphenylene derivative of the present invention shows a favorable energy level as compared with the work function 5.4 eV of general hole transport materials such as NPD and TPD, and has good hole It can be seen that it has transportation capability.
- Example 19 On a glass substrate 1 on which an ITO electrode is previously formed as a transparent anode 2, a hole injection layer 3, a hole transport layer 4, a light emitting layer 5, an electron transport layer 6, an electron injection layer 7, a cathode (aluminum electrode)
- the organic EL elements having a layer structure shown in FIG.
- the glass substrate 1 on which ITO having a thickness of 150 nm was formed was washed with an organic solvent, and then the surface was washed by oxygen plasma treatment. Then, this glass substrate with an ITO electrode was mounted in a vacuum vapor deposition machine and the pressure was reduced to 0.001 Pa or less. Subsequently, a compound 115 represented by the following structural formula was formed to a thickness of 20 nm as the hole injection layer 3 so as to cover the transparent anode 2.
- the compound of Example 2 (Compound 15) was formed as a hole transport layer 4 to a film thickness of 40 nm.
- lithium fluoride was formed as the electron injection layer 7 so as to have a film thickness of 0.5 nm.
- aluminum was deposited to a thickness of 150 nm to form the cathode 8.
- Example 20 The organic EL device was fabricated in the same manner as in Example 19 except that the compound (Compound 66) of Example 1 was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 21 The organic EL device was fabricated in the same manner as in Example 19 except that the compound of Example 3 (Compound 67) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 22 The organic EL device was fabricated in the same manner as in Example 19 except that the compound of Example 4 (Compound 79) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 23 The organic EL device was fabricated in the same manner as in Example 19 except that the compound of Example 5 (Compound 80) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 24 The organic EL device was fabricated in the same manner as in Example 19 except that the compound of Example 6 (Compound 81) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 25 The organic EL device was fabricated in the same manner as in Example 19 except that the compound of Example 7 (Compound 82) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 26 The organic EL device was fabricated in the same manner as in Example 19 except that the compound of Example 8 (Compound 83) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 27 The organic EL device was fabricated in the same manner as in Example 19 except that the compound (Compound 84) of Example 9 was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 28 The organic EL device was fabricated in the same manner as in Example 19 except that the compound of Example 10 (Compound 85) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 29 An organic EL device was prepared in the same manner as in Example 19 except that the compound of Example 11 (Compound 86) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 30 An organic EL device was produced in the same manner as in Example 19 except that the compound of Example 12 (Compound 87) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. did.
- the light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 31 An organic EL device was prepared in the same manner as in Example 19 except that the compound (Compound 46) of Example 13 was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 32 An organic EL device was produced in the same manner as in Example 19 except that the compound of Example 14 (Compound 88) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 33 An organic EL device was produced in the same manner as in Example 19 except that the compound of Example 15 (Compound 89) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 34 An organic EL device was prepared in the same manner as in Example 19 except that the compound of Example 16 (Compound 90) was used as the material for the hole transport layer 4 and the hole transport layer 4 was formed to a film thickness of 40 nm. Produced. The light emission characteristics when a DC voltage was applied to the organic EL element were measured in the same manner as in Example 19, and the results are shown in Table 1.
- Example 1 the driving voltage when a current of 10 mA / cm 2 was passed was 5.17 V for Compound 118 (Comparative Example 1), compared to 4.73 for the compounds of Examples 1-16. The voltage was reduced to -5.15V. Also, in terms of power efficiency, Examples 1 to 16 significantly improved 5.55 to 6.84 lm / W compared to 5.49 lm / W of Comparative Example 1.
- the organic EL device having an organic layer formed using the triphenylene derivative of the present invention has a light emission efficiency and a power higher than those of the known organic EL device using the compound 118. It was found that the efficiency can be improved and the practical driving voltage can be lowered.
- the triphenylene derivative of the present invention is excellent as a compound for an organic EL device because it has a high hole transport capability, is excellent in amorphous properties, and is stable in a thin film state.
- high luminous efficiency and power efficiency can be obtained, practical driving voltage can be lowered, and durability can be improved. For example, it has become possible to develop home appliances and lighting.
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Abstract
Description
NPDは良好な正孔輸送能力を持っているが、耐熱性の指標となるガラス転移点(Tg)が96℃と低く、高温条件下では結晶化による素子特性の低下が起こってしまう。また、特許文献1や特許文献2に記載の芳香族アミン誘導体の中には、正孔の移動度が10-3cm2/Vs以上と優れた移動度を有するものがあるが、電子阻止性が不十分であるため、電子の一部が発光層を通り抜けてしまい、発光効率の向上が期待できないなど、更なる高効率化のため、より電子阻止性が高く、薄膜がより安定で耐熱性の高い材料が求められていた。
p及びqは、それぞれ、0または1~4の整数を表し、
sは、0または1~3の整数を表し、
nは、0または1~2の整数を表し、
Ar1及びAr2は、それぞれ、芳香族炭化水素基または芳香族複素環
基を表すが、Ar1とAr2とは、単結合、置換基を有していてもよいメ
チレン基、酸素原子または硫黄原子を介して、互いに結合して環を形成
してもよく、
R1、R2及びR3は、それぞれ、重水素原子、フッ素原子、塩素原子
、シアノ基、ニトロ基、炭素原子数1~6のアルキル基、炭素原子数5
~10のシクロアルキル基、炭素原子数1~6のアルキルオキシ基、炭
素原子数5~10のシクロアルキルオキシ基、芳香族炭化水素基、芳香
族複素環基またはアリールオキシ基を表し、
A1及びA2は、それぞれ、2価の芳香族炭化水素基または2価の芳香
族複素環基を表し、
nが0の場合、A1とAr1とは、単結合、置換基を有していてもよい
メチレン基、酸素原子または硫黄原子を介して互いに結合して環を形成
してもよく、
nが1の場合、A1またはA2とAr1とは、単結合、置換基を有して
いてもよいメチレン基、酸素原子または硫黄原子を介して、互いに結合
して環を形成してもよく、
nが2の場合、複数個存在するA2は、互いに異なる基であってもよく
、且つ、A1またはA2とAr1とは、単結合、置換基を有していてもよい
メチレン基、酸素原子または硫黄原子を介して、互いに結合して環を形成
してもよい。
前記有機層の少なくとも一つの層は、前記トリフェニレン誘導体を含んでいることを特徴とする有機エレクトロルミネッセンス素子が提供される。
(A)正孔の注入特性が良いこと。
(B)正孔の移動度が大きいこと。
(C)電子阻止能力に優れること。
(D)薄膜状態が安定であること(優れたアモルファス性を示すこと)。
(E)耐熱性に優れていること。
(F)発光効率や電力効率が高いこと。
(G)発光開始電圧が低いこと。
(H)実用駆動電圧が低いこと。
(I)素子寿命が長いこと(高い耐久性を示す)。
また、トリフェニレン環に結合している置換基R3の個数を示すsは、0または1~3の整数を表す。
さらに、芳香族アミンの窒素原子とトリフェニレン環との間に存在する2価の基A2の個数を示すnは、0または1~2の整数を表す。
これらの芳香族基の例としては、フェニル基、ビフェニリル基、ターフェニリル基、ナフチル基、アントリル基、フェナントリル基、フルオレニル基、インデニル基、ピレニル基、ペリレニル基、フルオランテニル基、トリフェニレニル基、ピリジル基、フラニル基、ピラニル基、チエニル基、キノリル基、イソキノリル基、ベンゾフラニル基、ベンゾチエニル基、インドリル基、カルバゾリル基、ベンゾオキサゾリル基、ベンゾチアゾリル基、キノキサリル基、ベンゾイミダゾリル基、ピラゾリル基、ジベンゾフラニル基、ジベンゾチエニル基、およびカルボリニル基などを挙げることができる。
また、芳香族炭化水素基としては、フェニル基、ビフェニリル基、ナフチル基、フルオレニル基が好ましい。
さらに、これらのアルキル基は、置換基を有していてもよく、かかる置換基としては、重水素原子;フッ素原子、塩素原子、シアノ基、アリール基(例えば、フェニル基、ナフチル基、アントリル基、フルオレニル基、スチル基など)、芳香族複素環基(ピリジル基、ピリドインドリル基、キノリル基、ベンゾチアゾリル基など)等を挙げることができる。例えば、上記アルキル基は、トリフルオロメチル基などの基であってもよい。
シクロアルキル基の例;
シクロペンチル基、シクロヘキシル基、1-アダマンチル基、2-アダ
マンチル基など。
アルキルオキシ基の例;
メチルオキシ基、エチルオキシ基、n-プロピルオキシ基、イソプロピ
ルオキシ基、n-ブチルオキシ基、tert-ブチルオキシ基、n-ペン
チルオキシ基、n-ヘキシルオキシ基など。
シクロアルキルオキシ基の例;
シクロペンチルオキシ基、シクロヘキシルオキシ基、シクロヘプチルオ
キシ基、シクロオクチルオキシ基、1-アダマンチルオキシ基および2-
アダマンチルオキシ基など。
また、これらシクロアルキル基、アルキルオキシ基及びシクロアルキルオキシ基も置換基を有していてよく、このような置換基としては、前述したAr1及びAr2における芳香族炭化水素基及び芳香族複素環基が有していてよい置換基と同様のものを挙げることができる。
勿論、これらのアリールオキシ基も置換基を有していてよく、このような置換基としては、Ar1及びAr2における芳香族炭化水素基及び芳香族複素環基が有していてもよい置換基と同じものを挙げることができる。
また、nが1の場合、A1またはA2とAr1とは、単結合、置換基を有していてもよいメチレン基、酸素原子または硫黄原子を介して、互いに結合して環を形成してもよい。
さらに、nが2の場合、複数個存在するA2は、互いに異なる基であってもよく、且つ、A1またはA2とAr1とは、単結合、置換基を有していてもよいメチレン基、酸素原子または硫黄原子を介して、互いに結合して環を形成してもよい。
まず、一般式(1)のトリフェニレン誘導体が有するトリフェニレン環に相当するトリフェニレンを使用し、このトリフェニレン環の基A1が結合する部位(例えば2位)をブロモ化し、この臭素をボロン酸やボロン酸エステルに変換する(例えば、WO2010/002850号公報参照)。
このようにして得られたボロン酸エステル体と、一般式(1)のトリフェニレン誘導体が有する芳香族アミン部分に相当するアミンのブロモ体などをSuzukiカップリングなどのクロスカップリング反応(例えば、Chem.Rev.,95,2457(1995)参照)を行うことによって、目的とするトリフェニレン誘導体を合成することができる。
尚、得られた化合物の精製は、カラムクロマトグラフによる精製、シリカゲル、活性炭、活性白土などによる吸着精製、溶媒による再結晶や晶析法などによって行うことができ、その同定は、NMR分析による行われる。
p,q,s,n,Ar1,Ar2、R1~R3、A1及びA2は、前記
一般式(1)に記載したとおりの意味である。
p,q,s,Ar1,Ar2及びR1~R3は、前記一般式(1)に記
載したとおりの意味である。
p,q,s,Ar1,Ar2及びR1~R3は、前記一般式(1)に記
載したとおりの意味である。
尚、以下に示した化合物において、化合物No.1及び2は欠番となっている。
従って、本発明のトリフェニレン誘導体は、有機EL素子が有する有機層の形成材料として極めて有用である。
上述した本発明のトリフェニレン誘導体を用いて形成される有機層を備えた有機EL素子は、例えば図17に示す層構造を有している。
即ち、ガラス基板1(透明樹脂基板など、透明基板であればよい)の上に、透明な陽極2、正孔注入層3、正孔輸送層4、発光層5、電子輸送層6、電子注入層7及び陰極8が設けられている。
勿論、本発明のトリフェニレン誘導体が適用される有機EL素子は、上記の層構造に限定されるものではなく、正孔輸送層4と発光層5との間に電子阻止層や、発光層5と電子輸送層6との間に正孔阻止層などを設けることができるし、また、電子注入層7や正孔注入層3などを省略したシンプルな層構造とすることができる。例えば、上記の多層構造において、いくつかの層を省略することもできる。例えば基板1上に、陽極2、正孔輸送層3、発光層4、電子輸送層6及び陰極8を設けたシンプルな層構造とすることもできる。
銅フタロシアニンに代表されるポルフィリン化合物;
スターバースト型のトリフェニルアミン誘導体;
単結合或いはヘテロ原子を含まない2価基により、複数のトリフェニル
アミン骨格が連結された構造を有するアリールアミン(例えばトリフェニ
ルアミンの3量体や4量体);
塗布型の高分子材料、例えばポリ(3,4-エチレンジオキシチオフェ
ン)(PEDOT)、ポリ(スチレンスルフォネート)(PSS)など;
ヘキサシアノアザトリフェニレンのようなアクセプター性の複素環化合
物;
このような従来公知の正孔材料として代表的なものは、次のとおりである。
ベンジジン誘導体、例えば、
N,N’-ジフェニル-N,N’-ジ(m-トリル)ベンジジン
(以下、TPDと略す);
N,N’-ジフェニル-N,N’-ジ(α-ナフチル)ベンジジン
(以下、NPDと略す);
N,N,N’,N’-テトラビフェニリルベンジジン;
アミン系誘導体、例えば、
1,1-ビス[4-(ジ-4-トリルアミノ)フェニル]
シクロヘキサン (以下、TAPCと略す);
種々のトリフェニルアミン3量体および4量体;
正孔注入層用としても使用される上記の塗布型高分子材料;
<カルバゾール誘導体>
4,4’,4’’-トリ(N-カルバゾリル)トリフェニルアミン
(以後、TCTAと略称する);
9,9-ビス[4-(カルバゾール-9-イル)フェニル]
フルオレン;
1,3-ビス(カルバゾール-9-イル)ベンゼン
(以後、mCPと略称する);
2,2-ビス(4-カルバゾール-9-イルフェニル)アダマンタン
(以後、Ad-Czと略称する);
<トリアリールアミン構造を有する化合物>
9-[4-(カルバゾール-9-イル)フェニル]-9-[4-(トリ
フェニルシリル)フェニル]-9H-フルオレン;
この場合のホスト材料として、上記の発光材料に加え、チアゾール誘導体、ベンズイミダゾール誘導体、ポリジアルキルフルオレン誘導体などを使用するができ、さらに、前述した本発明のトリフェニレン誘導体を用いることもできる。
ドーパント材料としては、キナクリドン、クマリン、ルブレン、ペリレンおよびそれらの誘導体、ベンゾピラン誘導体、ローダミン誘導体、アミノスチリル誘導体などを用いることができる。
燐光発光材料としては、イリジウムや白金などの金属錯体の燐光発光体を使用することができる。例えば、Ir(ppy)3などの緑色の燐光発光体、FIrpic、FIr6などの青色の燐光発光体、Btp2Ir(acac)などの赤色の燐光発光体などを用いることができ、これらの燐光発光材料は、正孔注入・輸送性のホスト材料や電子輸送性のホスト材料にドープして使用される。
また、電子輸送性のホスト材料としては、p-ビス(トリフェニルシリル)ベンゼン(以後、UGH2と略称する)や2,2’,2’’-(1,3,5-フェニレン)-トリス(1-フェニル-1H-ベンズイミダゾール)(以後、TPBIと略称する)などを用いることができる。
このような正孔阻止作用を有する公知化合物の例としては、バソクプロイン(以後、BCPと略称する)などのフェナントロリン誘導体や、アルミニウム(III)ビス(2-メチル-8-キノリナート)-4-フェニルフェノレート(以後、BAlqと略称する)などのキノリノール誘導体の金属錯体の他、トリアゾール誘導体、トリアジン誘導体、オキサジアゾール誘導体などを挙げることができる。
これらの材料は、以下に述べる電子輸送層6の形成にも使用することができ、さらには、この正孔阻止層と電子輸送層6とを兼用させることもできる。
この電子輸送層6も、単層或いは多層の積層構造とすることができ、各層は、上述した電子輸送性化合物の1種或いは2種以上を用いて成膜される。
3.85g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 2.83g
トルエン 59ml
エタノール 15ml
2M炭酸カリウム水溶液 6ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.19g
を加えて加熱し、72℃で4.5時間攪拌した。室温まで放冷し、メタノール50mlを加え、析出する粗製物をろ過によって採取した。
この粗製物をトルエン300mlに溶解し、シリカゲル7.5gを用いた吸着精製を行い、減圧下で濃縮した後、1,2-ジクロロベンゼン/トルエンの混合溶媒によって結晶を析出させた。メタノールによる還流洗浄を行うことによって、ビス(ビフェニル-4-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物66)の白色粉体3.30g(収率66%)を得た。
δ(ppm)=8.98(1H)
8.87(1H)
8.78-8.71(4H)
7.94(1H)
7.84(2H)
7.65-7.59(12H)
7.39(4H)
7.32-7.22(8H)
イル)-フェニルアミン 3.89g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 3.08g
トルエン 59ml
エタノール 15ml
2M炭酸カリウム水溶液 6.5ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.21g
を加えて加熱し、72℃で5.5時間攪拌した。室温まで放冷し、水50ml、トルエン30mlを加えた後、分液操作によって有機層を採取した。この有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって褐色の粗製物を得た。
この粗製物をトルエン250mlに溶解し、シリカゲル7.5gを用いた吸着精製を行い、減圧下で濃縮した後、さらにカラムクロマトグラフ(担体:シリカゲル、溶離液:ヘキサン/トルエン)によって精製し、トルエン/メタノールの混合溶媒によって結晶を析出させた。この結晶をメタノールを用いて還流洗浄することにより、(9,9-ジメチル-9H-フルオレン-2-イル)-フェニル-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物15)の白色粉体3.34g(収率65%)を得た。
δ(ppm)=8.98(1H)
8.88(1H)
8.79-8.73(4H)
7.95(1H)
7.82(2H)
7.69-7.62(6H)
7.41(1H)
7.35(1H)
7.30-7.19(8H)
7.09(1H)
7.04(1H)
1.43(6H)
2-イル)アミン 17.9g
2-(4-ブロモフェニル)トリフェニレン 19.0g
tert-ブトキシナトリウム 5.72g
トルエン 200ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
酢酸パラジウム 0.22g
トリス-tert-ブチルホスフィンのトルエン溶液
(50%、w/v) 1.9ml
を加えて加熱し、80℃で1.5時間攪拌した。室温まで放冷し、水100ml、トルエン100mlを加えた後、分液操作によって有機層を採取した。この有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって褐色の粗製物を得た。
この粗製物をトルエン750mlに溶解し、シリカゲル30gを用いた吸着精製を行った後、トルエン/ヘキサンの混合溶媒による晶析、続いて、メタノールによる還流洗浄を行うことによって、(ビフェニル-4-イル)-(9,9-ジメチル-9H-フルオレン-2-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物67)の白色粉体28.2g(収率83%)を得た。
δ(ppm)=8.98(1H)
8.88(1H)
8.79-8.73(4H)
7.95(1H)
7.87(2H)
7.75-7.62(10H)
7.44(4H)
7.37-7.28(7H)
7.18(1H)
1.49(6H)
9-ジメチル-9H-フルオレン-2-イル)アミン 15.4g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 11.0g
トルエン 88ml
エタノール 22ml
2M炭酸カリウム水溶液 31ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.62g
を加えて加熱し、72℃で3時間攪拌した。室温まで放冷し、水50ml、トルエン100mlを加えた後、分液操作によって有機層を採取した。この有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって橙色の粗製物を得た。
この粗製物をカラムクロマトグラフ(担体:シリカゲル、溶離液:シクロヘキサン/トルエン)によって精製した後、トルエン/ヘキサンの混合溶媒による晶析、続いて、メタノールによる還流洗浄を行うことによって、(4-tert-ブチルフェニル)-(9,9-ジメチル-9H-フルオレン-2-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物79)の白色粉体14.5g(収率73%)を得た。
δ(ppm)=8.98(1H)
8.87(1H)
8.77(4H)
7.95(1H)
7.81(2H)
7.68-7.64(6H)
7.41(1H)
7.36(3H)
7.27-7.22(4H)
7.13(2H)
7.06(1H)
1.44(6H)
1.35(9H)
-(4-tert-ブチルフェニル)アミン 15.1g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 11.7g
トルエン 96ml
エタノール 24ml
2M炭酸カリウム水溶液 33ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.77g
を加えて加熱し、72℃で4時間攪拌した。室温まで放冷し、水100ml、トルエン150mlを加えた後、分液操作によって有機層を採取した。有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって灰色の粗製物を得た。
この粗製物をトルエン300mlに溶解し、シリカゲル20gを用いた吸着精製を行った後、トルエン/ヘキサンの混合溶媒による晶析、トルエン/メタノールの混合溶媒による晶析、さらに、メタノールによる還流洗浄を行うことによって、(ビフェニル-4-イル)-(4-tert-ブチルフェニル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物80)の白色粉体16.7g(収率83%)を得た。
δ(ppm)=8.97(1H)
8.87(1H)
8.77(4H)
7.95(1H)
7.81(2H)
7.64(6H)
7.56(2H)
7.41-7.37(4H)
7.26(3H)
7.19(2H)
7.14(2H)
1.34(9H)
-2-イル)-(3-メチルフェニル)アミン 15.0g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 12.3g
トルエン 120ml
エタノール 30ml
2M炭酸カリウム水溶液 33ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.76g
を加えて加熱し、72℃で20.5時間攪拌した。室温まで放冷し、水50ml、トルエン50mlを加えた後、分液操作によって有機層を採取した。この有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって褐色の粗製物を得た。
この粗製物をカラムクロマトグラフ(担体:シリカゲル、溶離液:ヘキサン/トルエン)によって精製した後、トルエン/メタノールの混合溶媒による晶析、トルエン/ヘキサンの混合溶媒による晶析、さらに、メタノールによる還流洗浄を行うことによって、(9,9-ジメチル-9H-フルオレン-2-イル)-(3-メチルフェニル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物81)の白色粉体13.1g(収率66%)を得た。
δ(ppm)=8.98(1H)
8.88(1H)
8.79-8.73(4H)
7.95(1H)
7.80(2H)
7.68-7.62(6H)
7.41(1H)
7.33-7.14(6H)
7.06(2H)
6.97(1H)
6.87(1H)
2.27(3H)
1.43(6H)
-(9,9-ジメチル-9H-フルオレン-2-イル)アミン
17.0g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 11.4g
トルエン 136ml
エタノール 34ml
2M炭酸カリウム水溶液 32ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.74g
を加えて加熱し、72℃で6時間攪拌した。室温まで放冷し、水100ml、トルエン100mlを加えた後、分液操作によって有機層を採取した。この有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって茶色の粗製物を得た。
この粗製物をカラムクロマトグラフ(担体:シリカゲル、溶離液:ヘキサン/トルエン)によって精製した後、テトラヒドロフラン/メタノールの混合溶媒による晶析、続いて、メタノールによる還流洗浄を行うことによって、(ビフェニル-4-イル)-(9,9-ジメチル-9H-フルオレン-2-イル)-{3-メチル-4-(トリフェニレン-2-イル)フェニル}アミン(化合物82)の薄黄色粉体13.1g(収率66%)を得た。
δ(ppm)=8.98-8.73(6H)
7.66-7.67(11H)
7.43-7.35(5H)
7.28-7.20(6H)
7.14-7.09(2H)
2,34(3H)
1.43(6H)
-4-イル)-(9,9-ジメチル-9H-フルオレン-2-イル)
アミン 17.5g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 8.9g
トルエン 314ml
エタノール 79ml
2M炭酸カリウム水溶液 19ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.57g
を加えて加熱し、68℃で8.5時間攪拌した。室温まで放冷し、水400mlを加えた後、分液操作によって有機層を採取した。有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって茶色の粗製物を得た。粗製物をカラムクロマトグラフ(担体:シリカゲル、溶離液:ヘキサン/トルエン)によって精製した後、トルエン/ヘキサンの混合溶媒による晶析、続いて、メタノールによる還流洗浄を行うことによって、(4’-tert-ブチルビフェニル-4-イル)-(9,9-ジメチル-9H-フルオレン-2-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物83)の白色粉体12.8g(収率71%)を得た。
δ(ppm)=9.00(1H)
8.88(1H)
8.78-8.72(4H)
7.96(1H)
7.84(2H)
7.69-7.68(2H)
7.68-7.63(4H)
7.58-7.55(4H)
7.45-7.40(4H)
7.32-7.23(6H)
7.13(1H)
1.45(6H)
1.35(9H)
-(4’-tert-ブチルビフェニル-4-イル)アミン
18.1g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 10.4g
トルエン 360ml
エタノール 90ml
2M炭酸カリウム水溶液 22ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.68g
を加えて加熱し、74℃で6.5時間攪拌した。室温まで放冷し、メタノール360mlを加え、析出する粗製物をろ過によって採取した。
この粗製物をトルエン400mlに溶解し、シリカゲル30gを用いた吸着精製を行い、減圧下で濃縮した後、トルエン/メタノールの混合溶媒による晶析、続いて、メタノールによる還流洗浄を行うことによって、(ビフェニル-4-イル)-(4’-tert-ブチルビフェニル-4-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物84)の黄色粉体17.4g(収率83%)を得た。
δ(ppm)=8.99(1H)
8.88(1H)
8.78(1H)
7.76-7.72(3H)
7.95(1H)
7.84(2H)
7.66-7.60(6H)
7.59-7.54(6H)
7.45(2H)
7.40(2H)
7.30(2H)
7.29-7.24(5H)
1.35(9H)
-4-イル)-フェニルアミン 15.5g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 11.4g
トルエン 300ml
エタノール 75ml
2M炭酸カリウム水溶液 25ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.79g
を加えて加熱し、68℃で6時間攪拌した。室温まで放冷し、水300mlを加えた後、分液操作によって有機層を採取した。有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって黒色の粗製物を得た。粗製物をカラムクロマトグラフ(担体:シリカゲル、溶離液:ヘキサン/トルエン)によって精製し、トルエン/メタノールの混合溶媒による晶析、続いて、メタノールによる還流洗浄を行うことによって、(4’-tert-ブチルビフェニル-4-イル)-フェニル-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物85)の白色粉体12.8g(収率66%)を得た。
δ(ppm)=8.97(1H)
8.87(1H)
8.77-8.71(4H)
7.92(1H)
7.81(2H)
7.65-7.62(4H)
7.55-7.52(4H)
7.44(2H)
7.29(2H)
7.25(2H)
7.20-7.19(4H)
7.05(1H)
1.33(9H)
-4-イル)-(ナフタレン-1-イル)アミン 17.8g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 10.8g
トルエン 267ml
エタノール 67ml
2M炭酸カリウム水溶液 23ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.71g
を加えて加熱し、68℃で3時間攪拌した。室温まで放冷し、水50mlを加えた後、分液操作によって有機層を採取した。この有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって黒色の粗製物を得た。
この粗製物をカラムクロマトグラフ(担体:シリカゲル、溶離液:ヘキサン/トルエン)によって精製し、メタノールによる還流洗浄を行うことによって、(4’-tert-ブチルビフェニル-4-イル)-(ナフタレン-1-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物86)の白色粉体11.9g(収率60%)を得た。
δ(ppm)=8.94(1H)
8.85(1H)
8.76-8.71(4H)
8.04(1H)
7.95(1H)
7.90(1H)
7.85(1H)
7.75(2H)
7.64-7.62(4H)
7.54(1H)
7.51-7.46(5H)
7.43-7.40(3H)
7.39(1H)
7.19(2H)
7.15(2H)
1.34(9H)
-(2-メチルフェニル)アミン 17.0g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 12.5g
トルエン 255ml
エタノール 64ml
2M炭酸カリウム水溶液 27ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.82g
を加えて加熱し、69℃で4時間攪拌した。室温まで放冷し、水250mlを加えた後、分液操作によって有機層を採取した。この有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって黒色の粗製物を得た。
この粗製物をトルエン400mlに溶解し、シリカゲル40gを用いた吸着精製を行った。減圧下で濃縮した後、トルエン/メタノールの混合溶媒による晶析、メタノールによる還流洗浄を行うことによって、(ビフェニル-4-イル)-(2-メチルフェニル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物87)の赤白色粉体11.6g(収率59%)を得た。
δ(ppm)=8.97(1H)
8.87(1H)
8.76(1H)
8.74-8.72(3H)
7.93(1H)
7.81(2H)
7.65-7.62(6H)
7.56(2H)
7.39(2H)
7.38-7.23(3H)
7.20-7.18(3H)
7.06(1H)
6.98(1H)
6.90(1H)
2.28(3H)
-2-イル)-(ナフタレン-1-イル)アミン 18.5g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 11.1g
トルエン 275ml
エタノール 69ml
2M炭酸カリウム水溶液 24ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.72g
を加えて加熱し、69℃で5時間攪拌した。室温まで放冷し、水270mlを加えた後、分液操作によって有機層を採取した。この有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって黒色の粗製物を得た。
この粗製物をカラムクロマトグラフ(担体:シリカゲル、溶離液:ヘキサン/トルエン)によって精製し、トルエン/ヘキサンの混合溶媒による晶析、メタノールで還流洗浄を行うことによって、(9,9-ジメチル-9H-フルオレン-2-イル)-(ナフタレン-1-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物46)の黄白色粉体7.05g(収率35%)を得た。
δ(ppm)=8.95(1H)
8.73(1H)
8.71-8.65(4H)
8.02(1H)
7.94(2H)
7.90(1H)
7.87(2H)
7.82-7.36(12H)
7.28-7.15(4H)
7.01(1H)
1.40(6H)
-(ジベンゾチオフェン-2-イル)アミン 14.3g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 10.0g
トルエン 80ml
エタノール 20ml
2M炭酸カリウム水溶液 7.8ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら60分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.65g
を加えて加熱し、10時間還流攪拌した。室温まで放冷し、水、トルエンを加え、析出する粗製物をろ過によって採取した。粗製物を1,2-ジクロロベンゼンによる再結晶、トルエン/1,2-ジクロロベンゼンの混合溶媒による再結晶を行うことによって、(ビフェニル-4-イル)-(ジベンゾチオフェン-2-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物88)の淡黄色粉体12.1g(収率65%)を得た。
δ(ppm)=8.99(1H)
8.87(1H)
8.79-8.74(4H)
8.14(2H)
7.96(1H)
7.88-7.85(4H)
7.65-7.58(7H)
7.50(1H)
7.43-7.26(10H)
-(9,9-ジメチル-9H-フルオレン-2-イル)アミン
15.6g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 10.2g
トルエン 80ml
エタノール 20ml
2M炭酸カリウム水溶液 8ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら60分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.67g
を加えて加熱し、4時間還流攪拌した。室温まで放冷し、水、トルエンを加え、析出する粗製物をろ過によって採取した。粗製物をトルエン/1,2-ジクロロベンゼン/酢酸エチルの混合溶媒による再結晶、メタノールによる還流洗浄を行うことによって、(ジベンゾチオフェン-2-イル)-(9,9-ジメチル-9H-フルオレン-2-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物89)の淡黄色粉体10.6g(収率53%)を得た。
δ(ppm)=9.00(1H)
8.89(1H)
8.80(1H)
7.78-7.74(3H)
8.13-8.11(2H)
7.99(1H)
7.88-7.84(4H)
7.69-7.63(6H)
7.44-7.42(3H)
7.41-7.38(4H)
7.27(1H)
7.23(1H)
7.14(1H)
1.42(6H)
-(4-ブロモフェニル)アミン 15.8g
4,4,5,5-テトラメチル-2-(トリフェニレン-2-イル)
-[1,3,2]ジオキサボラン 9.6g
トルエン 800ml
エタノール 20ml
2M炭酸カリウム水溶液 7.9ml
を、窒素雰囲気下、反応容器に加え、超音波を照射しながら30分間窒素ガスを通気した。
次いで、
テトラキス(トリフェニルホスフィン)パラジウム 0.66g
を加えて加熱し、4時間還流攪拌した。室温まで放冷し、水300mlを加えた後、分液操作によって有機層を採取した。この有機層を無水硫酸マグネシウムで乾燥させた後、減圧下で濃縮することによって褐色の粗製物を得た。
この粗製物をトルエンに溶解し、シリカゲル60gを用いた吸着精製、続いて、活性炭10gを用いた吸着精製を行い、さらに、トルエン/アセトン/メタノールの混合溶媒による晶析、トルエン/ヘキサンの混合溶媒による晶析を行った。その後、70℃に加温したトルエンを用いた洗浄を行った後、1,2-ジクロロメタンに溶解し、NHシリカゲルを用いた吸着精製を行い、さらに、ヘキサンによる晶析を行うことによって、ビス(9,9-ジメチル-9H-フルオレン-2-イル)-{4-(トリフェニレン-2-イル)フェニル}アミン(化合物90)の淡黄色粉体10.2g(収率51%)を得た。
δ(ppm)=8.92(1H)
8.82-8.65(5H)
7.95(1H)
7.81-7.62(10H)
7.49-7.16(12H)
1.43(12H)
実施例1~16で得られた化合物(トリフェニレン誘導体)について、高感度示差走査熱量計(ブルカー・エイエックスエス製、DSC3100S)によって融点とガラス転移点を求めた。その結果は、以下のとおりであった。
融点 ガラス転移点
実施例1の化合物 257℃ 116℃
実施例2の化合物 236℃ 115℃
実施例3の化合物 160℃ 131℃
実施例4の化合物 測定されず。 129℃
実施例5の化合物 236℃ 116℃
実施例6の化合物 測定されず。 115℃
実施例7の化合物 測定されず。 134℃
実施例8の化合物 245℃ 145℃
実施例9の化合物 160℃ 133℃
実施例10の化合物 145℃ 117℃
実施例11の化合物 172℃ 139℃
実施例12の化合物 129℃ 98℃
実施例13の化合物 測定されず。 136℃
実施例14の化合物 166℃ 133℃
実施例15の化合物 320℃ 149℃
実施例16の化合物 272℃ 147℃
実施例1~5、8~12、14~16で得られた本発明の化合物を用いて、ITO基板の上に膜厚100nmの蒸着膜を作製して、大気中光電子分光装置(理研計器製、AC-3型)で仕事関数を測定した。その結果は、以下のとおりであった。
仕事関数
実施例1の化合物 5.62eV
実施例2の化合物 5.57eV
実施例3の化合物 5.61eV
実施例4の化合物 5.37eV
実施例5の化合物 5.56eV
実施例8の化合物 5.46eV
実施例9の化合物 5.56eV
実施例10の化合物 5.63eV
実施例11の化合物 5.63eV
実施例12の化合物 5.60eV
実施例14の化合物 5.61eV
実施例15の化合物 5.56eV
実施例16の化合物 5.46eV
仕事関数
実施例6の化合物 5.57eV
実施例7の化合物 5.62eV
実施例13の化合物 5.63eV
ガラス基板1上に透明陽極2としてITO電極をあらかじめ形成したものの上に、正孔注入層3、正孔輸送層4、発光層5、電子輸送層6、電子注入層7、陰極(アルミニウム電極)8の順に蒸着して、図17に示す層構造の有機EL素子を作製した。
続いて、透明陽極2を覆うように、正孔注入層3として、下記構造式で表される化合物115を膜厚20nmとなるように形成した。
最後に、アルミニウムを膜厚150nmとなるように蒸着して陰極8を形成した。
具体的には、この有機EL素子に直流電圧を印加したときの発光特性を測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例1の化合物(化合物66)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例3の化合物(化合物67)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例4の化合物(化合物79)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例5の化合物(化合物80)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例6の化合物(化合物81)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例7の化合物(化合物82)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例8の化合物(化合物83)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例9の化合物(化合物84)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例10の化合物(化合物85)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例11の化合物(化合物86)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例12化合物(化合物87)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例13の化合物(化合物46)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例14の化合物(化合物88)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例15の化合物(化合物89)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
正孔輸送層4の材料として実施例16の化合物(化合物90)を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
この有機EL素子に直流電圧を印加したときの発光特性を実施例19と同様にして測定し、その結果を表1に示した。
比較のため、正孔輸送層4の材料として、実施例2の化合物の代わりに下記構造式の化合物118を使用し、膜厚40nmとなるように正孔輸送層4を形成した以外は、実施例19と同様にして有機EL素子を作製した。
また、電力効率においても、比較例1の5.49lm/Wに対して、実施例1~16では5.55~6.84lm/Wといずれも大きく向上した。
2:透明陽極
3:正孔注入層
4:正孔輸送層
5:発光層
6:電子輸送層
7:電子注入層
8:陰極
Claims (12)
- 下記一般式(1)で表されるトリフェニレン誘導体;
p及びqは、それぞれ、0または1~4の整数を表し、
sは、0または1~3の整数を表し、
nは、0または1~2の整数を表し、
Ar1及びAr2は、それぞれ、芳香族炭化水素基または芳香族
複素環基を表すが、Ar1とAr2とは、単結合、置換基を有して
いてもよいメチレン基、酸素原子または硫黄原子を介して、互い
に結合して環を形成してもよく、
R1、R2及びR3は、それぞれ、重水素原子、フッ素原子、塩
素原子、シアノ基、ニトロ基、炭素原子数1~6のアルキル基、
炭素原子数5~10のシクロアルキル基、炭素原子数1~6のア
ルキルオキシ基、炭素原子数5~10のシクロアルキルオキシ基、
芳香族炭化水素基、芳香族複素環基またはアリールオキシ基を表
し、
A1及びA2は、それぞれ、2価の芳香族炭化水素基または2価
の芳香族複素環基を表し、
nが0の場合、A1とAr1とは、単結合、置換基を有していて
もよいメチレン基、酸素原子または硫黄原子を介して互いに結合し
て環を形成してもよく、
nが1の場合、A1またはA2とAr1とは、単結合、置換基を有
していてもよいメチレン基、酸素原子または硫黄原子を介して、互
いに結合して環を形成してもよく、
nが2の場合、複数個存在するA2は、互いに異なる基であって
もよく、且つ、A1またはA2とAr1とは、単結合、置換基を有し
ていてもよいメチレン基、酸素原子または硫黄原子を介して、互い
に結合して環を形成してもよい。 - 前記一般式(1)において、nが0である請求項1に記載のトリフェニレン誘導体。
- 前記一般式(1)において、2価の基A1が置換基を有していてもよいフェニレン基である請求項1に記載のトリフェニレン誘導体。
- 前記2価の基A1がトリフェニレン環の2位に結合している請求項1に記載のトリフェニレン誘導体。
- 一対の電極とその間に挟まれた少なくとも一層の有機層を有する有機エレクトロルミネッセンス素子において、
前記有機層の少なくとも一つの層は、請求項1に記載のトリフェニレン誘導体を含んでいることを特徴とする有機エレクトロルミネッセンス素子。 - 前記トリフェニレン誘導体を含む有機層が正孔輸送層である請求項8記載の有機エレクトロルミネッセンス素子。
- 前記トリフェニレン誘導体を含む有機層が電子阻止層である請求項8記載の有機エレクトロルミネッセンス素子。
- 前記トリフェニレン誘導体を含む有機層が正孔注入層である請求項8記載の有機エレクトロルミネッセンス素子。
- 前記トリフェニレン誘導体を含む有機層が発光層である請求項8記載の有機エレクトロルミネッセンス素子。
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- 2012-10-12 CN CN201280051830.6A patent/CN103889945A/zh active Pending
- 2012-10-12 WO PCT/JP2012/076434 patent/WO2013061805A1/ja active Application Filing
- 2012-10-12 KR KR1020147010562A patent/KR20140084051A/ko not_active Application Discontinuation
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CN104662010A (zh) * | 2012-08-30 | 2015-05-27 | 出光兴产株式会社 | 芳香族胺衍生物以及使用其的有机电致发光元件 |
JPWO2014034793A1 (ja) * | 2012-08-30 | 2016-08-08 | 出光興産株式会社 | 芳香族アミン誘導体およびこれを用いた有機エレクトロルミネッセンス素子 |
CN104662010B (zh) * | 2012-08-30 | 2017-08-25 | 出光兴产株式会社 | 芳香族胺衍生物以及使用其的有机电致发光元件 |
US10985325B2 (en) | 2012-08-30 | 2021-04-20 | Idemitsu Kosan Co., Ltd. | Aromatic amine derivative, and organic electroluminescent element using same |
JP2016153394A (ja) * | 2015-02-17 | 2016-08-25 | 機光科技股▲分▼有限公司 | 有機エレクトロルミネセンス素子用インデノトリフェニレン系アミン誘導体 |
US10381570B2 (en) * | 2015-04-07 | 2019-08-13 | Samsung Display Co., Ltd. | Compound and organic light-emitting device including the same |
Also Published As
Publication number | Publication date |
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US20150034924A1 (en) | 2015-02-05 |
CN103889945A (zh) | 2014-06-25 |
KR20140084051A (ko) | 2014-07-04 |
TW201323378A (zh) | 2013-06-16 |
JPWO2013061805A1 (ja) | 2015-04-02 |
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