Ruthenium(II) complexes of α-diimines: synthesis, spectral characterisation, electrochemical properties and single-crystal X-ray structure of bis(2,2′-bipyridine){1-benzyl-2-(p-tollylazo)imidazole}ruthenium(II) perchlorate
作者:Sanjib Pal、Tarun K. Misra、Chittaranjan Sinha、Alexander M.Z. Slawin、J.Derek Woollins
DOI:10.1016/s0277-5387(00)00447-2
日期:2000.9
[Ru(bpy)2(RaaiR′)](ClO4)2·H2O (bpy=2,2′-bipyridine; RaaiR′=1-alkyl-2-(arylazo)imidazole) have been synthesized by a silver-assisted route [Ru(bpy)2Cl2+RaaiR′+AgNO3+NaClO4/Ru(bpy)2Cl2+[Ag(RaaiR′)2](ClO4)]. The structures of the complexes have been supported by the single-crystal X-ray diffraction study and the stereochemistry are assessed by 1H NMR spectral data. All the complexes show two metal-to-ligand charge
摘要混合配体三螯合物[Ru(bpy)2(RaaiR')](ClO4)2·H2O(bpy = 2,2'-联吡啶; RaaiR'= 1-烷基-2-(芳基偶氮)咪唑)具有通过银辅助路线[Ru(bpy)2Cl2 + RaaiR'+ AgNO3 + NaClO4 / Ru(bpy)2Cl2 + [Ag(RaaiR')2](ClO4)]合成。配合物的结构已得到单晶X射线衍射研究的支持,并通过1 H NMR光谱数据评估了立体化学。所有的络合物在约200nm的可见光区域均显示出两个金属至配体的电荷转移(MLCT)跃迁。此处还介绍了400和500 nm及其发射光谱。循环伏安研究显示,乙腈溶液中RuIII / II的电势较高(1.4 V vs. SCE),并且在SCE呈负值时连续出现三个配体还原。第一金属和后续配体氧化还原电势的差异与MLCT谱带的νCT线性相关。