Bis(trimethylsilyl)phenyl-bridged D-A molecules: Synthesis, spectroscopic properties and for achieving deep-blue emitting materials
作者:Ziqiu Shen、Xiangyu Zhu、Weiguo Tang、Yu Zheng、Zhikuan Zhou、Xin Jiang Feng、Zujin Zhao、Hua Lu
DOI:10.1016/j.dyepig.2019.108063
日期:2020.3
π-conjugated molecules display weak fluorescence with a long wavelength due to effective intramolecular charge transfer. In this paper, a series of donor-π-acceptor (D-π-A) molecules, incorporated with bis(trimethylsilyl)phenyl as a bridging group to twist molecular structure, were synthesized by Suzuki cross-coupling using diphenylamino and oxadiazole/triazole as electron-donating group and electron-withdrawing
通常,由于有效的分子内电荷转移,供体(D)-受体(A)π共轭分子显示出长波长的弱荧光。在本文中,一个系列的供体- π端受体(D- π -A)分子,与双(三甲基硅烷基)苯基作为桥连基团并入到扭曲的分子结构,通过使用二苯基氨基Suzuki交叉偶联合成和恶二唑/三唑作为给电子基团和吸电子基团。所得分子在固态深蓝色区域表现出高的热稳定性和强荧光。p -DSiTO的聚集诱导的发射增强(AIEE)观察到由于抑制了聚集状态下的分子振动和旋转。此外,局部激发(LE)发射显着增加,以显示处于聚集状态的混合局部和电荷转移(HLCT)发射。为了理解这些分子的光学和电化学性质,进行了理论计算和电化学测量。使用p -DSiTO作为发射极制造的非掺杂有机发光二极管(OLED)显示深蓝色发射,CIE x,y(国际照明委员会)为(0.160,0.105)。