Syntheses and Properties of Bimetallic Chromophore-Quencher Assemblies Containing Ruthenium(II) and Rhenium(I) Centers
作者:Benjamin J. Coe、Naomi R. M. Curati、Emma C. Fitzgerald、Simon J. Coles、Peter N. Horton、Mark E. Light、Michael B. Hursthouse
DOI:10.1021/om070042x
日期:2007.4.1
We have prepared a family of six new bimetallic complexes containing electron-donating trans-RuIICl(pdma)2}+ [pdma = 1,2-phenylenebis(dimethylarsine)] centers linked to trans-[RuIICl(pdma)(2,2‘-bpy)(NO)] (bpy = bipyridyl) or fac-ReI(biq)(CO)3}+-based (biq = 2,2‘-biquinolinyl) electron acceptors. The extended bridging units are based on 4,4‘-bpy or bpe [E-1,2-bis(4-pyridyl)ethylene] ligands, and these
我们准备了六个新的双金属配合物家族,它们包含给电子的反式-Ru II Cl(pdma)2 } + [pdma = 1,2-苯撑双(二甲基ar)]中心,这些中心与反式-[Ru II Cl(pdma) (2,2'-bpy)(NO)](bpy =联吡啶基)或基于fac- Re I(biq)(CO)3 } +的(biq = 2,2'-联喹啉基)电子受体。扩展的桥接单元基于4,4'-bpy或bpe [ E-1,2-双(4-吡啶基)乙烯]配体,这些组件被设计为显示长寿命的光致电荷分离态。还合成了许多新的单金属前体配合物并进行了充分表征。双金属物质的电子吸收光谱主要由可见的强d(Ru II)→π*(4,4'-bpy / bpe)金属-配体电荷转移(MLCT)带和d(Re I)决定。 →在近紫外区域的π*(biq)吸收。循环伏安法研究显示了基于金属的氧化和基于配体的还原过程,并提供了证据表明这些组件包