Bipolar deep-blue phenanthroimidazole derivatives: Structure, photophysical and electroluminescent properties
作者:Zhong-Yi Wang、Bin Liu、Jue-Wen Zhao、Gui-Lin Ruan、Si-Lu Tao、Qing-Xiao Tong
DOI:10.1016/j.orgel.2017.09.051
日期:2018.1
Two efficient fluorescence molecules, named 1-(4-trifluoromethylphenyl)-2-(4′-(1,4,5-triphenyl-1H-imidazole-2-yl)-[1,1′-biphenyl]-4-yl)-1H-phenanthro[9,10-d]imidazole (PPI-PIM-1) and 1-(4-trifluoromethylphenyl)-2-(4′-(2,4,5-triphenyl-1H-imidazole-1-yl)-[1,1′-biphenyl]-4-yl)-1H-phenanthro[9,10-d]imidazole (PPI-PIM-2) were designed and synthesized, in which the electron-withdrawing trifluoromethyl group
两个有效的荧光分子,称为1-(4-三氟甲基苯基)-2-(4'-(1,4,5-三苯基-1H-咪唑-2-基)-[1,1'-联苯] -4-基)-1H-菲并[9,10- d ]咪唑(PPI-PIM-1)和1-(4-三氟甲基苯基)-2-(4'-(2,4,5-三苯基-1H-咪唑-1- yl)-[1,1'-联苯] -4-yl)-1H-菲[9,10- d ]咪唑(PPI-PIM-2设计和合成),其中首先将吸电子三氟甲基引入菲并咪唑的N1位苯中,以提高电子传输能力并调节电荷转移(CT)组分。此外,与联苯并咪唑衍生物相比,在这里,我们打破了苯并咪唑的一个刚性平面以抑制聚集诱导的猝灭(ACQ),并将位置从C1更改为N1以同时限制共轭长度。基于PPI-PIM-1和PPI-PIM-2的设备表现出稳定的深蓝色发射,CIE坐标为(0.15,0.08)和(0.15,0.07),最大外部量子效率分别为4.3%和4.5%。更