| 苯并咪唑基Ir(Ⅲ)配合物的合成、结构和发光行为的调控或转换 |
| Benzoimidazole-Based Cyclometalated Ir(Ⅲ) Complexes: Syntheses, Structures and Luminescence Modulation/Switching |
|
| 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。 |
| 关键词: 铱配合物 晶体结构 光发射的转换或调控 |
| 基金项目: 国家自然科学基金（No.21871134）资助项目。 |
| 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 qbiH in 1·NO3, while anion ligand qbi- in 2. The different deprotonation degrees of ligands qbiH 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 Et3N/TFA vapor. This is due to the acid/base-induced structural interconversion between ligand qbiH and ligand qbi- in complexes 1·NO3 and 2. Moreover, we discuss the relationship between structure and luminescence for 1·NO3 and 2. |
| Keywords: iridium complex crystal structure luminescence modulation/switching |
| 投稿时间：2019-04-04 修订日期：2019-04-26 |
| 摘要点击次数: 1500 |
| 全文下载次数: 581 |
| 芮凯,吴石山,曹登科.苯并咪唑基Ir(Ⅲ)配合物的合成、结构和发光行为的调控或转换[J].无机化学学报,2019,35(8):1340-1348. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
