Rational Design, Synthesis, and Characterization of Deep Blue Phosphorescent Ir(III) Complexes Containing (4′-Substituted-2′-pyridyl)-1,2,4-triazole Ancillary Ligands
作者:Hea Jung Park、Ji Na Kim、Hyun-Ji Yoo、Kyung-Ryang Wee、Sang Ook Kang、Dae Won Cho、Ung Chan Yoon
DOI:10.1021/jo4012514
日期:2013.8.16
results of frontier orbital considerations, 4-substituted-2′-pyridyltriazoles were designed to serve as ancillary ligands in 2-phenylpyridine main ligand containing heteroleptic iridium(III) complexes that display deep blue phosphorescence emission. The iridium(III) complexes, Ir1–Ir7, prepared using the new ancillary ligands, were found to display structured, highly quantum efficient (Φp = 0.20–0.42) phosphorescence
基于前沿轨道考虑的结果,设计了4-取代的2'-吡啶基三唑作为包含2-苯吡啶主配体的辅助配体,所述主配体包含显示深蓝色磷光发射的杂化铱(III)配合物。铱(III)络合物,IR1 - IR7,使用新的辅助配体来制备,被发现显示结构化的,高效率的量子(Φ p= = 0.20–0.42)磷光,在室温下发射最大值为蓝色至深蓝色448–456 nm。与基于前沿轨道考虑的预测一致,观察到该配合物具有取决于辅助配体的吡啶部分的C-4位上的取代基的电子性质的发射性质。重要的是,在5-(吡啶-2'-基)-3-三氟甲基-1,2,4-三唑辅助配体的吡啶环的C-4'处存在一个供电子甲基,这导致铱( III)络合物,在室温下在液态和膜态下都显示出在448 nm处最大的深蓝色磷光发射。最后,发现使用含有优化的辅助配体作为掺杂剂的Ir配合物构建的OLED器件发出深蓝色,其CIE为0.15、0.18,