Energy Transfer Dynamics in Re<sup>I</sup>−Based Polynuclear Assemblies: A Quantitative Application of Förster Theory
作者:Troy E. Knight、Dong Guo、Juan Pablo Claude、James K. McCusker
DOI:10.1021/ic800670b
日期:2008.8.1
The synthesis, structure, and photophysical properties of a new family of tetranuclear FeRe 3 chromophore-quencher complexes having the general form [Fe(pyacac) 3(Re(bpy')(CO) 3) 3](OTf) 3 (where pyacac = 3-(4-pyridyl)-acetylacetonate and bpy' is 4,4',5,5'-tetramethyl-2,2'-bipyridine (tmb, 1), 2,2'-bipyridine (bpy, 2), and 4,4'-diethylester-2,2'-bipyridine (deeb, 3)) are reported. Time-resolved emission
具有新形式[Fe(pyacac)3(Re(bpy')(CO)3)3](OTf)3(其中pyacac)的四核FeRe 3生色团-猝灭剂新家族的合成,结构和光物理性质= 3-(4-吡啶基)-乙酰丙酮酸酯,bpy'为4,4',5,5'-四甲基-2,2'-联吡啶(tmb,1),2,2'-联吡啶(bpy,2),和4,4'-二乙酯-2,2'-联吡啶(deeb,3))被报道。在室温CH 2Cl 2溶液中获得的时间分辨发射数据显示出单一指数衰减动力学,对于复合物1、2,观察到的寿命为450 +/- 30 ps,755 +/- 40 ps和2.5 +/- 0.1 ns。和3。每种情况下的发射都分配给基于Re(I)的(3)MLCT激发态的衰减;寿命均明显小于相应的AlRe 3类似物(2250 +/- 100 ns,560 +/- 30 ns,分别准备了4个,5个和6个,分别为235 +/- 20 ns和235