炔基桥连吡啶咪唑类铜配合物的合成及其光学性能

Synthesis and optical properties of alkynyl bridged pyridylimidazole copper complexes

设计合成了通过炔基桥连发色团的吡啶咪唑配体2-(1H-咪唑-2-基)-5-苯基乙炔基吡啶(L1)、2-(1H-咪唑-2-基)-5-(4-三氟甲基-苯基乙炔基)-吡啶(L2)、4-[6-(1H-咪唑-2-基)-吡啶-3-基乙炔基]-苯酚(L3)及其铜(I)配合物,系统地研究了配合物的紫外-可见吸收光谱、荧光发射光谱、磷光寿命和量子产率。结果表明采用炔基桥连取代基与吡啶咪唑配体的方法可有效提高配合物在可见光区吸光能力,同时延长了配合物的激发态寿命。

Designed and synthesized the pyridine imidazole ligands 2-(1H-imidazol-2-yl)-5-phenylethynylpyridine(L1),2-(1H-imidazol-2-yl)bridged to the chromophore through alkynyl groups-5-(4-Trifluoromethyl-phenylethynyl)-pyridine(L2),4-[6-(1H-imidazol-2-yl)-pyridin-3-ylethynyl]-phenol(L3)And its copper(I)complex,systematically studied the ultraviolet-visible absorption spectrum,fluorescence emission spectrum,phosphorescence lifetime and quantum yield of the complex.The results show that the method of using alkynyl to bridge the substituent and the pyridine imidazole ligand can effectively improve the light absorption ability of the complex in the visible light region,and at the same time extend the excited state lifetime of the complex.