作者:Andreas F Stange、Satoshi Tokura、Mitsuo Kira
DOI:10.1016/s0022-328x(00)00429-0
日期:2000.10
that of [Ru(bpy)3](PF6)2, reduction of the ruthenium and rhenium complexes occurs at more positive potentials than that of [Ru(bpy)3](PF6)2 and Re(bpy)(CO)3Cl. Band maxima of the metal-to-ligand charge-transfer emission of the ruthenium and the rhenium complexes were observed at 620 and 610 nm, respectively. The results indicate that the LUMO levels of 2,2′-bipyridine and its metal complexes are lowered
通过相应的2-溴-5-甲硅烷基吡啶的脱卤偶联制备5,5'-双(三甲基甲硅烷基)-(1a)和5,5'-双(五甲基二甲硅烷基)-2,2'-联吡啶(1b)是描述。甲硅烷基取代会引起宽和红移的π→π*和σ→π* UV-vis吸收带;促进电化学还原。有了这些配体,一系列钌络合物[Ru(bpy)2(L)](PF 6)2(3a,L = 1a ; 3b,L = 1b)和[RuL 3 ](PF 6)2(4a, L = 1a ; 4b,L =图1b),以及铼化合物的Re(L)(CO)3 Cl(上图5a,L =图1A ;图5b,L = 1B)(联吡啶= 2,2'-联吡啶)的合成。这些络合物在钌络合物的460-480 nm范围内引起金属转移到配体的红移电荷,and络合物在400 nm左右。钌配合物3a,3b,4a和4b的氧化电位几乎与[Ru(bpy)3 ](PF 6)2相同,但钌和rh配合物的还原电位比[Ru(bpy)3