describe a series of A–D–A-type luminescent organoboranes L-B2Nn (n = 1, 3, 5) that show an increased number of Ar3N units as electron donors and two terminal Ar3B as acceptors. When the Ar3N moieties were extended from one to five units, their electron-donating strength was gradually enhanced and the highest occupied molecular orbital (HOMO)–lowest unoccupied molecular orbital (LUMO) energy gaps could
三芳基
硼烷 (Ar 3 B) 和三芳基胺 (Ar 3 N) 已被广泛用于构建电子不同的供体-受体 (D-A) 系统。在此,我们描述了一系列 A-D-A 型发光有机
硼烷LB 2 N n ( n = 1, 3, 5),它们显示出更多的 Ar 3 N 单元作为电子供体和两个末端 Ar 3 B 作为受体. 当 Ar 3N 部分从 1 个单位扩展到 5 个单位,它们的给电子强度逐渐增强,最高占据分子轨道 (HOMO) - 最低未占据分子轨道 (LUMO) 能隙也可以调节,这进一步反映在红色-将发射从蓝色 (λ em = 458 nm) 转移到橙色 (λ em = 595 nm), E间隙 (elect)从 3.19减小到 2.61 eV。与其他成员相比, LB 2 N 5显示出巨大的斯托克斯位移(~14 057 cm -1)和相当亮的发射,具有增强的固态量子效率(Φ S = 98%)。磅2 N 3和LB