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A Novel Linking Strategy of Using 9,10-Dihydroacridine to Construct Efficient Host Materials for Red Phosphorescent Organic Light-Emitting Diodes.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-07-09 , DOI: 10.1002/chem.201802030 Xiang-Yang Liu 1 , Yu-Yang Ma 1 , Wenjuan Zhang 1 , Bo Song 2 , Lei Ding 3 , Man-Keung Fung 1 , Jian Fan 1
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-07-09 , DOI: 10.1002/chem.201802030 Xiang-Yang Liu 1 , Yu-Yang Ma 1 , Wenjuan Zhang 1 , Bo Song 2 , Lei Ding 3 , Man-Keung Fung 1 , Jian Fan 1
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Three novel 9,10‐dihydroacridine derivatives, 4′‐(10‐methyl‐9,9‐diphenyl‐9,10‐dihydroacridin‐4‐yl)[1,1′‐biphenyl]‐4‐carbonitrile (MeAcPhCN), 4′‐(9,9,10‐triphenyl‐9,10‐dihydroacridin‐4‐yl)[1,1′‐biphenyl]‐4‐carbonitrile (PhAcPhCN), and 5‐[4‐(9,9,10‐triphenyl‐9,10‐dihydroacridin‐4‐yl)phenyl]picolinonitrile (MeAcPyCN), were prepared by the attachment of [1,1′‐biphenyl]‐4‐carbonitrile or 5‐phenylpicolinonitrile to the 4‐position of 9,10‐dihydroacridine. This special linking strategy limited the conjugation length, maintained the triplet energy, and inhibited the intermolecular charge‐transfer (ICT) characteristics of these compounds. Notably, the enhanced accepting strength of the picolinonitrile segment relative to that of benzonitrile led to relatively strong ICT characteristics, a low energy gap, and a low triplet energy for MeAcPyCN. The thermal, photophysical, electrochemical, and electroluminescent properties of these host materials were studied systematically. Consequently, (acetylacetonato)bis(2‐methyldibenzo[f,h]quinoxaline)iridium(III) [Ir(MDQ)2(acac)]‐based red phosphorescent organic light‐emitting diodes (PHOLEDs) were fabricated with these three host materials. As a result, the device hosted by MeAcPhCN showed good device performance with a maximum external quantum efficiency of 20.5 %.
中文翻译：
使用9,10-二氢ac啶构建红色磷光有机发光二极管的高效基质材料的新型链接策略。
三种新颖的9,10-二氢ac啶衍生物4'-（10-甲基-9,9-二苯基-9,10-二氢ac啶-4-基）[1,1'-联苯] -4-腈（MeAcPhCN），4 ′-（9,9,10-三苯基-9,10-二氢ac啶-4-基）[1,1'-联苯] -4-腈（PhAcPhCN）和5- [4-（9,9,10-三苯基-9,10-二氢ac啶-4-基）苯基]吡啶啉（MeAcPyCN）是通过将[1,1'-联苯] -4-腈或5-苯基吡啶啉连接到9,10的4位制备的-二氢ac啶 这种特殊的连接策略限制了共轭长度，保持了三重态能量，并抑制了这些化合物的分子间电荷转移（ICT）特性。值得注意的是，相对于苯甲腈，吡啶甲腈链段的接受强度增强导致MeAcPyCN具有相对较强的ICT特性，较低的能隙和较低的三重态能量。散热 系统地研究了这些主体材料的光物理，电化学和电致发光特性。因此，（乙酰丙酮基）双（2-甲基二苯并[使用这三种主体材料制造了基于f，h ]喹喔啉）铱（III）[Ir（MDQ）2（acac）]的红色磷光有机发光二极管（PHOLED）。结果，由MeAcPhCN托管的设备显示出良好的设备性能，最大外部量子效率为20.5％。
更新日期：2018-07-09
中文翻译：
使用9,10-二氢ac啶构建红色磷光有机发光二极管的高效基质材料的新型链接策略。
三种新颖的9,10-二氢ac啶衍生物4'-（10-甲基-9,9-二苯基-9,10-二氢ac啶-4-基）[1,1'-联苯] -4-腈（MeAcPhCN），4 ′-（9,9,10-三苯基-9,10-二氢ac啶-4-基）[1,1'-联苯] -4-腈（PhAcPhCN）和5- [4-（9,9,10-三苯基-9,10-二氢ac啶-4-基）苯基]吡啶啉（MeAcPyCN）是通过将[1,1'-联苯] -4-腈或5-苯基吡啶啉连接到9,10的4位制备的-二氢ac啶 这种特殊的连接策略限制了共轭长度，保持了三重态能量，并抑制了这些化合物的分子间电荷转移（ICT）特性。值得注意的是，相对于苯甲腈，吡啶甲腈链段的接受强度增强导致MeAcPyCN具有相对较强的ICT特性，较低的能隙和较低的三重态能量。散热 系统地研究了这些主体材料的光物理，电化学和电致发光特性。因此，（乙酰丙酮基）双（2-甲基二苯并[使用这三种主体材料制造了基于f，h ]喹喔啉）铱（III）[Ir（MDQ）2（acac）]的红色磷光有机发光二极管（PHOLED）。结果，由MeAcPhCN托管的设备显示出良好的设备性能，最大外部量子效率为20.5％。
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