JPWO2012157537A1 - 発光素子材料および発光素子 - Google Patents
発光素子材料および発光素子 Download PDFInfo
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- 0 C*c(c(*)c1*(*)c2c(*)c(*)c3*)c(*)c(*)c1-c2c3I Chemical compound C*c(c(*)c1*(*)c2c(*)c(*)c3*)c(*)c(*)c1-c2c3I 0.000 description 2
- OZDFFGBETHIESA-UHFFFAOYSA-N CC(C)(c1c2)c(cc(cc3)Br)c3-c1ccc2-c(cc1)ccc1-[n]1c(cccc2)c2c2ccccc12 Chemical compound CC(C)(c1c2)c(cc(cc3)Br)c3-c1ccc2-c(cc1)ccc1-[n]1c(cccc2)c2c2ccccc12 OZDFFGBETHIESA-UHFFFAOYSA-N 0.000 description 1
- UOFLHSVGPKLEBN-UHFFFAOYSA-N CC1(C)c(cc(cc2)-c3cccc(-[n]4c5ccccc5c5c4cccc5)c3)c2-c(cc2)c1cc2-c(cc1)ccc1-c1cccnc1 Chemical compound CC1(C)c(cc(cc2)-c3cccc(-[n]4c5ccccc5c5c4cccc5)c3)c2-c(cc2)c1cc2-c(cc1)ccc1-c1cccnc1 UOFLHSVGPKLEBN-UHFFFAOYSA-N 0.000 description 1
- NWVRGDDCUDKCOM-UHFFFAOYSA-N CC1(C)c(cc(cc2)[Br]=C)c2-c2c1cc(C)cc2 Chemical compound CC1(C)c(cc(cc2)[Br]=C)c2-c2c1cc(C)cc2 NWVRGDDCUDKCOM-UHFFFAOYSA-N 0.000 description 1
- JYDCSAQMKKILJR-UHFFFAOYSA-N CC1(C)c2cc(-c3cccc(-[n]4c5ccccc5c5ccccc45)c3)ccc2-c(cc2)c1cc2-c(cc1)ccc1Cl Chemical compound CC1(C)c2cc(-c3cccc(-[n]4c5ccccc5c5ccccc45)c3)ccc2-c(cc2)c1cc2-c(cc1)ccc1Cl JYDCSAQMKKILJR-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
化合物[1]の合成
2−ブロモフルオレン25.0g、ヨウ素12.2gおよび酢酸680mlからなる溶液に、窒素気流下で、硫酸68mLをゆっくり加えた。この混合溶液に亜硝酸ナトリウム7.1gをゆっくり加えた後、還流下で2時間撹拌した。反応混合物を室温に冷ました後、析出物をろ過した。得られた析出物を、酢酸エチル、水およびメタノールでそれぞれ洗浄し、真空乾燥することにより、2−ブロモ−7−ヨードフルオレン25.9g(収率68%)を得た。
化合物[1]: 1H−NMR (CDCl3 (d=ppm)) δ 1.60 (s,6H),7.29 (td,2H),7.37−7.58 (m,6H),7.63−7.78 (m,7H),7.81−7.89 (m,6H),7.94 (dt,1H),8.18 (d,2H),8.62 (dd,1H),8.93 (d,1H)。
化合物[2]の合成
中間体(A)2.4g、4−(4−ピリジル)フェニルボロン酸ピナコールエステル2.1g、ジメトキシエタン24mLおよび1.5M炭酸ナトリウム水溶液7mLの混合溶液を窒素置換した後、ビス(トリフェニルホスフィン)パラジウムジクロリド33mgを加え、還流下で12時間半加熱撹拌した。反応混合物を室温に冷却した後、水24mLを加え、析出物をろ過し、真空乾燥した。析出物をシリカゲルカラムクロマトグラフィーにより精製し、溶出液に、スカベンジャーとしてQuadraSil(登録商標)0.5gを加え、室温で1時間撹拌した後、シリカパッドでろ過し、溶媒を留去した。o−キシレン73mLを用いて得られた固体の再結晶をおこない、白色結晶2.2g(収率73%)を得た。
化合物[2]: 1H−NMR (CDCl3 (d=ppm)) δ 1.60 (s,6H),7.31 (td,2H),7.41−7.52 (m,4H),7.55−7.59 (m,3H),7.64−7.89 (m,13H),8.18 (d,2H),8.69 (dd,2H)。
化合物[3]の合成
2−ブロモ−7−ヨード−9,9−ジメチルフルオレン11.5g、4−(9−カルバゾリル)フェニルボロン酸9.1g、ジメトキシエタン144mLおよび1.5M炭酸ナトリウム水溶液42mLの混合溶液を窒素置換した後、ビス(トリフェニルホスフィン)パラジウムジクロリド202mgを加え、60℃で5.5時間加熱撹拌した。反応混合物を約40℃に冷却した後、水200mLを加え、析出物をろ過した。析出物をメタノールで洗浄し、ろ過し、真空乾燥した。析出物をシリカゲルカラムクロマトグラフィーにより精製し、溶出液をエバポレートした。得られた固体に、メタノール100mlを加え、ろ過し、真空乾燥することにより、中間体(C)10.1g(収率68%)を得た。
化合物[3]: 1H−NMR (CDCl3 (d=ppm)) δ 1.65 (s,6H),7.30 (td,2H),7.38−7.52 (m,5H),7.64−7.98 (m,15H),8.18 (d,2H),8.63 (dd,1H),8.94 (d,1H)。
化合物[4]の合成
中間体(C) 5.1g、4−(2−ピリジル)フェニルボロン酸2.2g、ジメトキシエタン49mLおよび1.5M炭酸ナトリウム水溶液14mLの混合溶液を窒素置換した後、ビス(トリフェニルホスフィン)パラジウムジクロリド69mgを加え、還流下で4時間半加熱撹拌した。反応混合物を室温に冷却した後、水49mLを加え、析出物をろ過し、真空乾燥した。析出物をシリカゲルカラムクロマトグラフィーにより精製し、溶出液にQuadraSil(登録商標)0.8gを加え、室温で1時間撹拌した後、セライトでろ過した。ろ液をエバポレートした後、得られた固体にメタノール20mlを加え、ろ過した。ろ液を真空乾燥した後、N,N−ジメチルホルムアミド54mLを用いて再結晶をおこなった。さらに、N,N−ジメチルホルムアミド46mLを用いて再結晶をおこなうことで、白色結晶3.5g(収率60%)を得た。
化合物[4]: 1H−NMR (CDCl3 (d=ppm)) δ 1.65 (s,6H),7.31 (td,2H),7.41−7.52 (m,4H),7.66−7.93 (m,15H),8.12−8.19 (m,4H),8.74 (dt,1H)。
ITO透明導電膜を150nm堆積させたガラス基板(ジオマテック(株)製、表面電気抵抗11Ω/□、スパッタ品)を38×46mmに切断した後、エッチングを行い、ITO透明導電膜を所定の電極形状に形成した。得られた基板を“セミコクリーン56”(商品名、フルウチ化学(株)製)で15分間超音波洗浄してから、超純水で洗浄した。この基板を、素子を作製する直前に1時間UV−オゾン処理し、真空蒸着装置内に設置して、装置内の真空度が5×10−4Pa以下になるまで排気した。ITO透明導電膜上に、抵抗加熱法によって、まず正孔注入層として、銅フタロシアニンを10nmの厚さ、正孔輸送層として、4,4’−ビス(N−(1−ナフチル)−N−フェニルアミノ)ビフェニルを50nmの厚さ、それぞれ蒸着した。次に、発光層として、ホスト材料である化合物(H−1)およびドーパント材料である化合物(D−1)を混合した層を、ドーパント濃度が5重量%になるようにして40nmの厚さに蒸着した。次に、電子輸送層として化合物[1]とドナー性化合物であるフッ化リチウムを混合した層を、蒸着速度比1:1(0.05nm/s:0.05nm/s)で20nmの厚さに蒸着して積層した。
ホスト材料、ドーパント材料および電子輸送層として表1および表2に記載した材料を用いた以外は、実施例1と同様にして発光素子を作製した。結果は表1および表2に示した。なお、化合物[5]〜[19]、2E−1は下記に示す化合物である。
ホスト材料、ドーパント材料および電子輸送層として表2に記載した材料を用いた以外は、実施例1と同様にして発光素子を作製した。結果は表2に示した。なお、表1および表2中、化合物E−1、E−2、E−3、E−4は下記に示す化合物である。
ホスト材料、ドーパント材料および電子輸送層として表3に記載した材料を用いた以外は、実施例1と同様にして発光素子を作製した。評価結果は表3に示した。なお、表3中、化合物H−2〜H−8、D−2〜D−10は下記に示す化合物である。
ホスト材料およびドーパント材料として表4に記載した材料および電子輸送層としてトリス(8−キノリノラート)アルミニウム(Alq)を用いた以外は、実施例1と同様にして発光素子を作製した。評価結果は表4に示した。
Claims (14)
- 下記一般式(1)で表される化合物を含有する発光素子材料:
- 電子受容性窒素を含む芳香族複素環基がピリジル基、キノリニル基、イソキノリニル基、キノキサニル基、ピラジニル基、ピリミジル基、ピリダジニル基、フェナントロリニル基、イミダゾピリジル基、トリアジル基、アクリジル基、ベンゾイミダゾリル基、ベンゾオキサゾリル基、ベンゾチアゾリル基、ビピリジル基およびターピリジル基からなる群より選ばれる請求項1記載の発光素子材料。
- 一般式(2)におけるR7がL1との連結に用いられる請求項1〜3のいずれか記載の発光素子材料。
- 一般式(2)におけるR2がL2との連結に用いられる請求項1〜4のいずれか記載の発光素子材料。
- 一般式(3)におけるR15、R18またはR21がL1との連結に用いられる請求項1〜5のいずれか記載の発光素子材料。
- L1が核炭素数5〜12の置換もしくは無置換のアリーレン基である請求項1〜6のいずれか記載の発光素子材料。
- L2が核炭素数5〜12の置換もしくは無置換のアリーレン基である請求項1〜7のいずれか記載の発光素子材料。
- 陽極と陰極の間に有機層が存在し、電気エネルギーにより発光する発光素子であって、前記有機層に請求項1〜8のいずれか記載の発光素子材料を含有する発光素子。
- 前記有機層が電子輸送層を含み、電子輸送層が請求項1〜8のいずれか記載の発光素子材料を含む請求項9記載の発光素子。
- 前記電子輸送層がさらにドナー性化合物を含む請求項10記載の発光素子。
- 前記ドナー性化合物がアルカリ金属、アルカリ金属を含有する無機塩、アルカリ金属と有機物との錯体、アルカリ土類金属、アルカリ土類金属を含有する無機塩またはアルカリ土類金属と有機物との錯体である請求項11記載の発光素子。
- 前記ドナー性化合物がアルカリ金属と有機物との錯体またはアルカリ土類金属と有機物との錯体である請求項12記載の発光素子。
- 前記有機層が発光層を含み、発光層が請求項1〜8のいずれか記載の発光素子材料を含む請求項9記載の発光素子。
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KR102457008B1 (ko) * | 2014-05-23 | 2022-10-19 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 헤테로고리 화합물, 발광 소자, 발광 장치, 전자 기기, 및 조명 장치 |
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JP2004277377A (ja) | 2003-03-18 | 2004-10-07 | Junji Kido | フルオレン系化合物、およびこれを用いた有機電界発光素子 |
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JP5277578B2 (ja) * | 2007-07-25 | 2013-08-28 | 東洋インキScホールディングス株式会社 | カルバゾリル基を有する化合物およびその用途 |
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