A series of donor–acceptor–donor’ (D-A-D′) type compounds with aggregation-induced emission (AIE) were designed and synthesized by using imidazole as an acceptor and triphenylamine and indolocarbazole as different donors. The non-coplanar structure could effectively eliminate the molecular aggregation-caused quenching (ACQ). Meanwhile, the electron push-pull character could be adjusted by introducing
以咪唑为受体,三苯胺和吲哚并咔唑为不同的供体,设计合成了一系列具有聚集诱导发射(AIE)的供体-受体-供体(DAD')型化合物。非共面结构可以有效消除分子聚集引起的猝灭(ACQ)。同时,可以通过引入不同的取代基来调整电子推挽特性,以实现其局部激发(LE)状态的高效荧光。电子结构、电化学行为、热稳定性、光物理性质和电致发光系统地研究了这些化合物的 (EL) 性能。四种新材料被评估为非掺杂 OLED 中的蓝色发射体,所有器件都呈现出稳定的蓝色发射和出色的 EL 性能。此外,以化合物5b为双蓝色发光层,化合物5d为主体掺杂磷光染料,制备了混合型白色有机发光二极管(WOLED) 。该器件的最大电流效率和外量子效率分别为67.6 cd/A和24.3%。特别是,WOLED 显示出超稳定的 CIE 坐标 (x = 0.337 ± 0.003, y = 0.341 ± 0.002) 作为驱动电压从 5 V
Novel electrofluorochromic materials based on asymmetric D-A-D′ type indolocarbazole-imidazole-triarylamine derivatives