【摘要】 合成了2个新的铱配合物[Ir（ppy）（qbiH）]NO₃（1·NO₃）和[Ir（ppy）（qbi）]（2）。晶体结构分析表明,配合物1·NO₃和2中的[Ir（ppy）2]+单元分别与苯并咪唑基的中性配体qbiH与阴离子配体qbi-螯合。在溶液以及在固态条件下,2个配合物表现出明显不同的发光行为。1·NO₃和2在CH₂Cl₂溶液中的磷光发射波长分别为581和574 nm。在固态,1·NO₃和2分别发红色（616 nm）与桔色（598 nm）的磷光。有趣的是,1·NO₃和2在Et3N或TFA蒸汽的作用下,表现出红光发射与桔光发射之间的转换,这是因为它们的配体qbiH和qbi-发生了酸碱诱导的结构转换。此外,还讨论了配合物1·NO₃和2的结构与发光行为之间的关系。更多还原

【Abstract】 Two iridium complexes [Ir（ppy）（qbiH）]NO₃（1·NO₃） and [Ir（ppy）（qbi）]（2） have been synthesized. Their crystal structures indicate that an [Ir（ppy）2]+unit is chelated by a neutral benzoimidazole-based ligand qbi H in 1·NO₃, while anion ligand qbi-in 2. The different deprotonation degrees of ligands qbi H and qbi-in the two complexes lead to their clear differences in luminescence both in solution and in solid state. Complexes 1·NO₃ and 2 in CH₂Cl₂ show the emissions at 581 and 574 nm, respectively. In solid state, a red emission at 611 nm was observed for 1·NO₃, while an orange emission at 598 nm for 2. It is interesting that both 1·NO₃ and 2 in solid state exhibited luminescence switching between red emission and orange emission, upon meeting Et3 N/TFA vapor. This is due to the acid/base-induced structural interconversion between ligand qbi H and ligand qbi-in complexes 1·NO₃ and 2. Moreover, we discuss the relationship between structure and luminescence for 1·NO₃ and 2. CCDC: 1907283, 1·NO₃; 1907284, 2.更多还原