Solution <i>versus</i> solid-state dual emission of the Au(<scp>i</scp>)-alkynyl diphosphine complexes <i>via</i> modification of polyaromatic spacers
作者:Andrey Belyaev、Ilya Kolesnikov、Alexei S. Melnikov、Vladislav V. Gurzhiy、Sergey P. Tunik、Igor O. Koshevoy
DOI:10.1039/c9nj03426a
日期:——
of new materials with unconventional photophysical behavior. In this work, a family of diphosphine ligands PPh2–PAH–PPh2 with variable polyaromatic hydrocarbon (PAH) spacers (PAH = 9,10-anthracene L1, 1,4-naphthalene L2, 2,6-naphthalene L3, and their diethynyl congeners L4–L6) were employed to prepare gold(I) complexes (RC2Au)PPh2–PAH–PPh2(AuC2R) (1–22), containing a selection of alkynyl groups. Investigation
具有多种发射能力的单分子发光体对于开发具有非常规光物理行为的新材料至关重要。在这项工作中,二膦的家族的配体PPH 2 -PAH-PPH 2具有可变多环芳烃(PAH)间隔物(PAH = 9,10-蒽L1,1,4-萘L2,2,6-萘L3,和它们的用二乙炔同系物L4–L6制备金(I)络合物(RC 2 Au)PPh 2 –PAH–PPh 2(AuC 2 R)(1–22),其中包含一个炔基基团。它们的光学性质的研究表明与基于蒽的二膦(即化合物1-4和13-16)仅显示1 IL(ππ*)荧光与Φ EM高达93%。然而,萘和二乙炔基萘二膦配合物(5-12和17-22)在固态和溶液中表现出全色发射,其特征是低能和高能信号充分分离,其源于1 IL(ππ*)和3 IL(ππ*)跃迁以及从金属到配体的一定贡献以及从配体到配体的电荷转移。