JP2019055942A - 含窒素化合物及びそれを含む有機電界発光素子 - Google Patents
含窒素化合物及びそれを含む有機電界発光素子 Download PDFInfo
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- JP2019055942A JP2019055942A JP2018153294A JP2018153294A JP2019055942A JP 2019055942 A JP2019055942 A JP 2019055942A JP 2018153294 A JP2018153294 A JP 2018153294A JP 2018153294 A JP2018153294 A JP 2018153294A JP 2019055942 A JP2019055942 A JP 2019055942A
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- -1 Nitrogen-containing compound Chemical class 0.000 title claims abstract description 133
- 239000000126 substance Substances 0.000 claims abstract description 23
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 20
- 125000003118 aryl group Chemical group 0.000 claims abstract description 18
- 125000001072 heteroaryl group Chemical group 0.000 claims abstract description 16
- 125000004093 cyano group Chemical group *C#N 0.000 claims abstract description 15
- 125000003277 amino group Chemical group 0.000 claims abstract description 9
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 9
- 125000005328 phosphinyl group Chemical group [PH2](=O)* 0.000 claims abstract description 7
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 claims abstract description 7
- 125000005843 halogen group Chemical group 0.000 claims abstract description 6
- 229910052805 deuterium Inorganic materials 0.000 claims abstract description 5
- 125000004431 deuterium atom Chemical group 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 140
- 150000001875 compounds Chemical class 0.000 claims description 73
- 230000005525 hole transport Effects 0.000 claims description 46
- 239000012044 organic layer Substances 0.000 claims description 29
- 125000000217 alkyl group Chemical group 0.000 claims description 17
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 16
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 14
- 239000002019 doping agent Substances 0.000 claims description 13
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- 125000001153 fluoro group Chemical group F* 0.000 claims description 10
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- 125000004306 triazinyl group Chemical group 0.000 claims description 9
- 125000004076 pyridyl group Chemical group 0.000 claims description 8
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims description 6
- 125000005509 dibenzothiophenyl group Chemical group 0.000 claims description 6
- 238000005401 electroluminescence Methods 0.000 claims description 6
- ASUOLLHGALPRFK-UHFFFAOYSA-N phenylphosphonoylbenzene Chemical group C=1C=CC=CC=1P(=O)C1=CC=CC=C1 ASUOLLHGALPRFK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 4
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- 125000000842 isoxazolyl group Chemical group 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical group [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 125000000040 m-tolyl group Chemical group [H]C1=C([H])C(*)=C([H])C(=C1[H])C([H])([H])[H] 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 125000000250 methylamino group Chemical group [H]N(*)C([H])([H])[H] 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- 125000003136 n-heptyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000005184 naphthylamino group Chemical group C1(=CC=CC2=CC=CC=C12)N* 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 125000002971 oxazolyl group Chemical group 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 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 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 125000004625 phenanthrolinyl group Chemical group N1=C(C=CC2=CC=C3C=CC=NC3=C12)* 0.000 description 1
- 125000005561 phenanthryl group Chemical group 0.000 description 1
- 125000001484 phenothiazinyl group Chemical group C1(=CC=CC=2SC3=CC=CC=C3NC12)* 0.000 description 1
- 125000001644 phenoxazinyl group Chemical group C1(=CC=CC=2OC3=CC=CC=C3NC12)* 0.000 description 1
- XPPWLXNXHSNMKC-UHFFFAOYSA-N phenylboron Chemical group [B]C1=CC=CC=C1 XPPWLXNXHSNMKC-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 125000004592 phthalazinyl group Chemical group C1(=NN=CC2=CC=CC=C12)* 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 125000001725 pyrenyl group Chemical group 0.000 description 1
- 125000002098 pyridazinyl group Chemical group 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 125000000714 pyrimidinyl group Chemical group 0.000 description 1
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 description 1
- 125000002943 quinolinyl group Chemical group N1=C(C=CC2=CC=CC=C12)* 0.000 description 1
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- WSANLGASBHUYGD-UHFFFAOYSA-N sulfidophosphanium Chemical group S=[PH3] WSANLGASBHUYGD-UHFFFAOYSA-N 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- JLBRGNFGBDNNSF-UHFFFAOYSA-N tert-butyl(dimethyl)borane Chemical group CB(C)C(C)(C)C JLBRGNFGBDNNSF-UHFFFAOYSA-N 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 125000001113 thiadiazolyl group Chemical group 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 150000003613 toluenes Chemical class 0.000 description 1
- LALRXNPLTWZJIJ-UHFFFAOYSA-N triethylborane Chemical group CCB(CC)CC LALRXNPLTWZJIJ-UHFFFAOYSA-N 0.000 description 1
- WXRGABKACDFXMG-UHFFFAOYSA-N trimethylborane Chemical group CB(C)C WXRGABKACDFXMG-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000001651 triphenylamine derivatives Chemical class 0.000 description 1
- MXSVLWZRHLXFKH-UHFFFAOYSA-N triphenylborane Chemical group C1=CC=CC=C1B(C=1C=CC=CC=1)C1=CC=CC=C1 MXSVLWZRHLXFKH-UHFFFAOYSA-N 0.000 description 1
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- TYHJXGDMRRJCRY-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) tin(4+) Chemical compound [O-2].[Zn+2].[Sn+4].[In+3] TYHJXGDMRRJCRY-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
前記化学式1において、A1〜A10はそれぞれ独立してCR3またはNであり、R1〜R3はそれぞれ独立して水素原子、重水素原子、ハロゲン原子、シアノ基、置換もしくは無置換のアミノ基、置換または無置換のシリル基、置換もしくは無置換のホスフィニル基、置換もしくは無置換の炭素数1以上20以下のアルキル基、置換もしくは無置換の環形成炭素数6以上30以下のアリール基、または置換もしくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、a及びbはそれぞれ独立して0以上4以下の整数である。
は結合される部位を意味する。
キシル基、4−t−ブチルシクロヘキシル基、n−ヘプチル基、1−メチルペプチル基、2、2−ジメチルヘプチル基、2−エチルヘプチル基、2−ブチルヘプチル基、n−オクチル基、tーオクチル基、2−エチルオクチル基、2−ブチルオクチル基、2−ヘキシルオクチル基、3、7−ジメチルオクチル基、シクロオクチル基、n−ノニル基、n−デシル基、アダマンチル基、2ーエチルデシル基、2−ブチルデシル基、2−ヘキシルデシル基、2−オクチルデシル基、n−ウンデシル基、n−ドデシル基、2−エチルドデシル基、2−ブチルドデシル基、2−ヘキシルドデシル基、2−オクチルデシル基、n−トリデシル基、n−テトラデシル基、n−ペンタデシル基、n−ヘキサデシル基、2−エチルヘキサデシル基、2−ブチルヘキサデシル基、2−ヘキシルヘキサデシル基、2−オクチルヘキサデシル基、n−ヘプタデシル基、n−オクタデシル基、n−ノナデシル基、n−イコシル基、2−エチルイコシル基、2−ブチルイコシル基、2−ヘキシルイコシル基、2−オクチルイコシル基、n−ヘンイコシル基、n−ドコシル基、n−トリコシル基、n−テトラコシル基、n−ペンタコシル基、n−ヘキサコシル基、n−ヘプタコシル基、n−オクタコシル基、n−ノナコシル基、及びn−トリアコンチル基などが挙げられるが、これに限らない。
ゾチオフェニル基、ジベンゾチオフェニル基、チエノチオフェニル基、ベンゾフラニル基、フェナントロリニル基、チアゾリル基、イソオキサゾリル基、オキサジアゾリル基、チアジアゾリル基、フェノチアジニル基、ジベンゾシロリル基、及びジベンゾフラニル基などが挙げられるが、これに限らない。
、置換もしくは無置換の炭素数1以上20以下のアルキル基、置換もしくは無置換の環形成炭素数6以上30以下のアリール基、または置換もしくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、a及びbはそれぞれ独立して0以上4以下の整数である。
2を含む。
oxide)、ITZO(indium tin zinc oxide)などを含む。第1電極EL1が半透過型電極または反射型電極であれば、第1電極EL1はAg、Mg、Cu、Al、Pt、Pd、Au、Ni、Nd、Ir、Cr、Li、Ca、LiF/Ca、LiF/Al、Mo、Ti、またはこれらの化合物や混合物(例えば、AgとMgの混合物)を含む。また、前記物質で形成された反射膜や半透過膜、及びITO、IZO、ZnO、ITZOなどで形成された透明導電膜を含む複数の層構造であってもよい。例えば、第1電極EL1はITO/Ag/ITOの3層構造を有してもよいが、これに限らない。
輸送領域HTRは、下記化学式1で表される含窒素化合物を1種または2種以上含んでもよい。
ルバゾール系誘導体、フルオレン系誘導体、TPD(N,N’−ビス(3−メチルフェニル)−N,N’−ジフェニル−[1,1−ビフェニル]−4,4’−ジアミン)、TCTA(4,4’,4”−トリス(N−カルバゾリル)トリフェニルアミン)などのようなトリフェニルアミン系誘導体、NPD(N,N’−ジ(ナフタレン−1−イル)−N,N’−ジフェニル−ベンジジン)、TAPC(4,4’−シクロへキシリデンビス[N,N−ビス(4−メチルフェニル)ベンゼンアミン])、HMTPD(4,4’−ビス[N,N’−(3−トリル)アミノ]−3,3’−ジメチルビフェニル)、またはmCPなどを含んでもよい。また、上述したように、電子阻止層EBLは、本発明の一実施形態による含窒素化合物を含む。
これに限らない。
方法を利用して形成される。
本発明の一実施例による含窒素化合物は、例えば、下記のように合成してもよい。但し、本発明の一実施例による含窒素化合物の合成方法はこれに限らない。
本発明の一実施例による含窒素化合物である化合物2は、例えば、下記反応によって合成されてもよい。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、4−ブロモ−2−クロロ−1−ヨードベンゼン(5.00g)、(2−クロロフェニル)ボロン酸(2.46g)、テトラキス(トリフェニルホスフィン)パラジウム(0)(Pd(PPh3)4、0.91g)、炭酸カリウム(K2CO3、4.35g)を脱気したトルエン/エタノール/水の混合溶媒(10:1:2、200mL)に溶解して、80℃で16時間攪拌した。反応
後、水を加えてトルエンで抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧留去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物Aを3.47g(収率73%)得た。FAB−MS測定で測定された化合物Aの分子量は301であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、化合物A(3.00g)、カルバゾール(1.66g)、ビス(ジヘンジリデンアセトン)パラジウム(0)(Pd(dba)2、0.29g)、トリ−tert−ブチルホスフィン(P(tBu)3、0.40g)、ナトリウム−tert−ブトキシド(NaO(tBu)、0.96g)を脱水トルエン(200mL)に溶解し、8時間加熱還流した。反応後、水を加えてトルエンで抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物Bを3.32g(収率86%)得た。FAB−MS測定で測定された化合物Bの分子量は388であった。
Bioorg.Med.Chem.24(2016)5103−5114を参照し、1H,1’H−2,2’−ビベンズ[d]イミダゾールである化合物ac−1を合成した。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、化合物A(3.00g)、化合物ac−1(1.81g)、Pd(dba)2(0.89g)、2−ジシクロヘキシルホスフィノ−2’,6’−ジメトキシビフェニル(SPhos、1.27g)、NaO(tBu)(1.50g)を脱水キシレン(200mL)で溶解し、6時間加熱還流した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物2を1.02g(収率24%)得た。FAB−MS測定で測定された化合物2の分子量は549であった。
(化合物Cの合成)
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、2,2’−ジブロモ−5.5’−ジクロロ−1,1’−ビフェニル(3.00g)、化合物ac−1(1.84g)、(Pd(dba)2(0.91g)、SPhos(1.29g)、NaO(tBu)(1.51g)を脱水キシレン(200mL)で溶解し、6時間加熱還流した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧
流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物Cを1.18g(収率33%)得た。FAB−MS測定で測定された化合物Cの分子量は453であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、化合物C(1.00g)、3−(4,4,5,5−テトラメチル−1,3,2−ジオキサボラン−2−イル)ピリジン(1.00g)、(Pd(PPh3)4(0.50g)、K2CO3(1.52g)を脱気したトルエン/エタノール/水の混合溶媒(10:1:2、50mL)に溶解して、80℃で16時間攪拌した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物7を0.85g(収率80%)得た。FAB−MS測定で測定された化合物7の分子量は538であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、4−ブロモ−3−クロロベンゾニトリル(3.00g)、ビス(ピナコラート)ジボロン(5.27g)、[1,1’−ビス(ジフェニルホスフィノ)フェロセン]ジクロロパラジウム(II) ジクロロメタン付加物(Pd(dppf)Cl2、1.13g)、酢酸カリウム(KOAc、4.08g)を脱水1,4−ジオキサン(100mL)に溶解して、10℃で8時間攪拌した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物Dを2.92g(収率80%)得た。FAB−MS測定で測定された化合物Dの分子量は263であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、化合物D(2.50g)、4−ブロモ−3−クロロベンゾニトリル(2.05g)、(Pd(PPh3)4(1.09g)、K2CO3(2.62g)を脱気したトルエン/エタノール/水の混合溶媒(10:1:2、100mL)に溶解して、80℃で16時間攪拌した。反応後、水を加えてCH2Cl2で抽出し、有機層を加えてMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物Eを1.94g(収率75%)得た。FAB−MS測定で測定された化合物Eの分子量は273であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、化合物E(1.90g)、化合物ac−1(1.62g)、Pd(dba)2(0.80g)、SPhos(1.14g)、NaO(tBu)(1.34g)を脱水キシレン(200mL)に溶解し、6時間加熱還流した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物14を0.97g(収率32%)得た。FAB−MS測定で測定された化合物14の分子量は434であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、3−ブロモ−2−クロロピリジン(5.00g)、2−(クロロフェニル)ボロン酸(4.06g)、(Pd(PPh3)4(1.50g)、K2CO3(7.12g)を脱気したトルエン/エタノール/水の混合溶媒(10:1:2、130mL)に溶解して、80℃で16時間攪拌した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物Fを4.08g(収率70%)得た。FAB−MS測定で測定された化合物Fの分子量は224であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、化合物F(4.00g)、化合物ac−1(4.18g)、Pd(dba)2(2.05g)、SPhos(2.93g)、NaO(tBu)(3.43g)を脱水キシレン(100mL)に溶解し、8時間加熱還流した。水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物15を1.31g(収率19%)得た。FAB−MS測定で測定された化合物15の分子量は385であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、2−ブロモ−3−クロロピリジン(5.00g)、2−(クロロフェニル)ボロン酸(4.07g)、(Pd(PPh3)4(1.50g)、K2CO3(7.15g)を脱気したトルエン/エタノール/
水の混合溶媒(10:1:2、130mL)に溶解して、80℃で16時間攪拌した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物Gを4.19g(収率72%)得た。FAB−MS測定で測定された化合物Gの分子量は224であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、化合物G(4.00g)、化合物ac−1(4.18g)、Pd(dba)2(2.06g)、SPhos(2.92g)、NaO(tBu)(3.45g)を脱水キシレン(100mL)に溶解し、8時間加熱還流した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物18を1.17g(収率17%)得た。FAB−MS測定で測定された化合物18の分子量は385であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、5−ブロモ−4−クロロ−2−フェニルピリミジン(5.00g)、2−(クロロフェニル)ボロン酸(2.90g)、(Pd(PPh3)4(1.07g)、K2CO3(5.13g)を脱気したトルエン/エタノール/水の混合溶媒(10:1:2、100mL)に溶解して、80℃で16時間攪拌した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物Hを4.25g(収率76%)得た。FAB−MS測定で測定された化合物Hの分子量は301であった。
アルゴン(Ar)雰囲気下、500mLの三口フラスコに、化合物F(4.00g)、化合物ac−1(3.11g)、Pd(dba)2(1.53g)、SPhos(2.18g)、NaO(tBu)(2.55g)を脱水キシレン(200mL)に溶解し、6時間加熱還流した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物25を1.23g(収率20%)得た。FAB−MS測定で測定された化合物25の分子量は462であった。
(化合物ac−2の合成)
レン(220mL)に溶解し、6時間加熱還流した。反応後、水を加えてCH2Cl2で抽出し、有機層を分離してMgSO4で乾燥した後、溶媒を減圧流去した。得られた粗生成物をシリカゲルカラムクロマトグラフィで精製し、化合物48を1.66g(収率21%)得た。FAB−MS測定で測定された化合物48の分子量は412であった。
(化合物ac−3の合成)
上述した化合物2、7、14、15、18、25、26、27、48、及び60を発光層のホスト材料として使用し、実施例1〜10の有機電界発光素子を製作した。
上述した化合物2を電子阻止層の材料として使用し、実施例11の有機電界発光素子を
製作した。
実施例11、比較例5〜6の有機電界発光素子は、ITOで150nm厚さの第1電極を形成し、HAT−CNで10nm厚さの正孔注入層を形成し、α−NPDで80nm厚さの正孔輸送層を形成し、実施例化合物または比較例化合物で5nm厚さの電子阻止層を形成し、DPEPOにACRSAを18%ドーピングした20nm厚さの発光層を形成し、DPEPOで10nmの厚さの正孔阻止層を形成し、TPBiで30nm厚さの電子輸送層を形成し、LiFで0.5nm厚さの電子注入層を形成し、Alで100nm厚さの第2電極を形成した。各層は、全て真空蒸着法で形成した。
製作した有機電界発光素子の発光特性評価には、浜松ホトニクス社製C9920−11輝度配向特性測定装置を利用した。
HTR:正孔輸送領域 HIL:正孔注入層
HTL:電子輸送層 EML:発光層
ETR:電子輸送領域 ETL:電子輸送層
EIL:電子注入層 EL2:第2電極
Claims (13)
- 下記化学式1で表される含窒素環化合物:
前記化学式1において、
A1〜A10はそれぞれ独立してCR3またはNであり、
R1〜R3はそれぞれ独立して水素原子、重水素原子、ハロゲン原子、シアノ基、置換もしくは無置換のアミノ基、置換もしくは無置換のシリル基、置換もしくは無置換のホスフィニル基、置換もしくは無置換の炭素数1以上20以下のアルキル基、置換もしくは無置換の環形成炭素数6以上30以下のアリール基、または置換もしくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、
a及びbはそれぞれ独立して0以上4以下の整数である。 - 前記A1〜A8のうち、Nの個数は0、1または2である、請求項1に記載の含窒素環化合物。
- 前記A9〜A10が互いに同じものである、請求項1に記載の含窒素環化合物。
- 前記A1〜A8のうち少なくとも一つはCR3またはNであり、
前記R3はフッ素原子、シアノ基、置換もしくは無置換のアリールアミノ基、置換もしくは無置換のトリフェニルシリル基、置換もしくは無置換のジフェニルホスフィンオキシド基、置換もしくは無置換の炭素数1以上5以下のアルキル基、置換もしくは無置換のフェニル基、置換もしくは無置換のピリジニル基、置換もしくは無置換のトリアジニル基、置換もしくは無置換のカルバゾリル基、置換もしくは無置換のジベンゾフラニル基、または置換もしくは無置換のジベンゾチオフェニル基である、請求項1に記載の含窒素環化合物。 - A3〜A10はNである請求項1に記載の含窒素環化合物。
- A9及びA10はそれぞれ独立してCR3であり、
R3は水素原子、置換もしくは無置換の炭素数1以上5以下のアルキル基、または置換もしくは無置換のフェニル基である請求項1に記載の含窒素環化合物。 - a及びbが0である請求項1に記載の含窒素環化合物。
- a及びbのうち少なくとも一つが1以上であり、
R1〜R2のうち少なくとも一つがフッ素原子、シアノ基、置換もしくは無置換のアリールアミノ基、置換もしくは無置換のトリフェニルシリル基、置換もしくは無置換のジフェニルホスフィンオキシド基、置換もしくは無置換のフェニル基、置換もしくは無置換のピリジニル基、置換もしくは無置換のトリアジニル基、置換もしくは無置換のカルバゾール
基、置換もしくは無置換のジベンゾフラニル基、または置換もしくは無置換のジベンゾチオフェニル基である、請求項1に記載の含窒素環化合物。 - 前記化学式1で表される含窒素化合物は、下記第1化合物群に示した化合物のうちから選択されるいずれか一つである、請求項1に記載の含窒素環化合物。
[第1化合物群]
。 - 第1電極と、
前記第1電極と向かい合う第2電極と、
前記第1電極と前記第2電極の間に配置され、発光層を含む複数の有機層と、を含み、
前記有機層のうち少なくとも一つの有機層は、請求項1乃至9のうちいずれか一項に記載の含窒素化合物を含むものである、有機電界発光素子。 - 前記発光層が、前記含窒素化合物を含むものである請求項10に記載の有機電界発光素子。
- 前記発光層はホスト及びドーパントを含み、
前記ホストは前記含窒素化合物を含む、請求項10に記載の有機電界発光素子。 - 前記有機層は、
前記第1電極と前記発光層との間に配置された正孔輸送領域と、
前記発光層と前記第2電極の間に配置された電子輸送領域と、を含み、
前記正孔輸送領域は前記含窒素化合物を含む、請求項10に記載の有機電界発光素子。
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