Creation of cationic iridium(iii) complexes with aggregation-induced phosphorescent emission (AIPE) properties by increasing rotation groups on carbazole peripheries
作者:Guo-Gang Shan、Dong-Xia Zhu、Hai-Bin Li、Peng Li、Zhong-Min Su、Yi Liao
DOI:10.1039/c0dt01559h
日期:——
ancillary ligand (L2), 2 and 3 possess a unique aggregation-induced phosphorescent emission (AIPE) property. This phenomenon was unprecedentedly observed in the cationic iridium(III) complexes. In order to investigate the underlying mechanism of this AIPE behavior, their photophysical, temperature-dependent aggregation properties as well as theoretical calculations, were performed. The results suggest
三阳离子 铱 含复合物 4,7-双(3,6-二叔丁基-9 H-咔唑-9-基)-1,10-菲咯啉(L 1)和4,7-双(3',6'-二叔丁基-6-(3,6-二叔丁基-9 H-咔唑-9-基)-3,9'-bi(9 H -咔唑)-9-基)-1,10-菲咯啉(L 2)作为辅助配体,即[Ir(ppy)2(L 1)] PF 6(1),[Ir(ppy)2(L 2)] PF 6(2)和[Ir(oxd)2(L 2)] PF 6(3)(ppy是2-苯基吡啶,oxd是 2,5-二苯基-1,3,4-恶二唑),已经设计和准备好了。在辅助配体(L 2)上具有更多的分子内旋转单元时,2和3具有独特的聚集诱导的磷光发射(爱普) 财产。这种现象在阳离子中被前所未有地观察到铱(III)复合体。为了研究这种AIPE行为的潜在机理,进行了它们的光物理,温度依赖性聚集特性以及理论计算。结果表明,分子内旋转受限是导致分子水平降低的原因