Intramolecular Exchange Energy Transfer in a Bridged Bimetallic Transition Metal Complex: Calculation of Rate Constants Using Emission Spectral Fitting Parameters
作者:Yongwu Y. Liang、Aaron I. Baba、Won Y. Kim、Stephen J. Atherton、Russell H. Schmehl
DOI:10.1021/jp961750r
日期:1996.1.1
the transition metal complexes [(bpy)2Ru]2(bphb)}(PF6)4, [(tpy)(CN)Ru]2(bphb)}(PF6)2, and [(bpy)2Ru(bphb)Ru(tpy)(CN)](PF6)4 (bpy = 2,2‘-bipyridine, tpy = 2,2‘,6‘,2‘‘-terpyridine, bphb = 1,4-bis(2,2‘-bipyrid-4-yl)benzene) was investigated in acetonitrile solution and low-temperature glasses. Luminescence spectra, excitation spectra, and transient absorption decays of the three complexes serve to show
过渡金属配合物[(bpy)2 Ru] 2(bphb)}(PF 6)4,[(tpy)(CN)Ru] 2(bphb)}(PF 6)2和[ (bpy)2 Ru(bphb)Ru(tpy)(CN)](PF 6)4(bpy = 2,2'-联吡啶,tpy = 2,2',6',2''-三吡啶,bphb = 1在乙腈溶液和低温玻璃中研究了,4-双(2,2'-联吡啶-4-基)苯)。三种配合物的发光光谱,激发光谱和瞬态吸收衰减用于显示[[bpy)2的MLCT激发态的分子内电子能量转移Ru(bphb)发色团到含tpy发色团的MLCT状态发生在不对称双金属配合物中。即使在20 K的4:1乙醇:甲醇玻璃中,也观察到了从[[(bpy)2 Ru(bphb)]发色团到含tpy的发色团的几乎完全的能量转移。使用半经典交换能量转移机制来处理可用的数据; 使用从发光光谱的拟合确定的参数获得弗兰克-康登加权态密度(FCWD)。