Aryl Bridged 1-Hydroxypyridin-2-one: Effect of the Bridge on the Eu(III) Sensitization Process
作者:Anthony D’Aléo、Evan G. Moore、Géza Szigethy、Jide Xu、Kenneth N. Raymond
DOI:10.1021/ic901161z
日期:2009.10.5
Gd(III) and the Eu(III) metal complexes, time-dependent density functional theory (TD-DFT) analysis of model compounds and evaluation of the kinetic parameters for the europium emission were completed. Some striking differences were observed in the luminescence quantum yield by altering the bridging unit. The [Eu(L2)2]− derivative shows efficient sensitization coupled with good metal centered emission
Eu 3+发光效率通过来自天线配体的能量转移可以强烈依赖于金属离子配位几何形状。已经使用一系列由不同长度和几何形状的桥连接的四齿 1,2-HOPO 衍生物探测了 Eu(III) 敏化的几何成分。的配体是Ñ,Ñ ' - (1,2-亚苯基)双(1-羟基-6-氧代-1,6-二氢吡啶-2-甲酰胺)对配体(L 1),1-羟基- ñ - ( 2-(1-hydroxy-6-oxo-1,6-dihydropyridine-2-carboxamido)benzyl)-6-oxo-1,6-dihydropyridine-2-carboxamide (L 2 ) 和N , N'-(1,2-亚苯基双(亚甲基))双(1-羟基-6-氧代-1,6-二氢吡啶-2-甲酰胺)(L 3 )。完成了 Gd(III) 和 Eu(III) 金属配合物的光谱表征、模型化合物的时间相关密度泛函理论 (TD-DFT) 分析和铕发射动力学参