Rapid energy transfer in bichromophoric tris-bipyridyl/cyclometallated ruthenium(<scp>ii</scp>) complexes
作者:Sascha Ott、Magnus Borgström、Leif Hammarström、Olof Johansson
DOI:10.1039/b508655h
日期:——
The synthesis, characterization, and photophysical properties of the N6-N5C bichromophoric [(bpy)2Ru(I)Ru(ttpy)][PF6]3 (bpy is 2,2'-bipyridine and ttpy is 4'-p-tolyl-2,2':6',2''-terpyridine) and [(bpy)2Ru(II)Ru(ttpy)][PF6]3 (I and II are bpy-dipyridylbenzene ditopic ligands bridged by an ethynyl and phenyl unit, respectively) complexes are reported together with the model mononuclear complexes [(bpy)2Ru(I)][PF6]2
N6-N5C双发色的[(bpy)2Ru(I)Ru(ttpy)] [PF6] 3(bpy是2,2'-联吡啶,ttpy是4'-p-甲苯基- 2,2':6',2''-吡啶)和[(bpy)2Ru(II)Ru(ttpy)] [PF6] 3(I和II是由乙炔基和苯基单元桥接的bpy-二吡啶基苯二位配体,分别报告了复合物和模型单核复合物[(bpy)2Ru(I)] [PF6] 2,[(bpy)2Ru(II)] [PF6] 2,[Ru(VI)(ttpy)] [PF6 ](VI是3,5-二(2-吡啶基)-联苯)和[Ru(dpb)(ttpy)] [PF(6)](Hdpb是1,3-二(2-吡啶基)-苯)。电化学数据表明,双金属配合物中金属中心之间几乎没有基态电子通信。双发色体系中N(5)C单元的选择性激发导致典型的双三齿环金属化钌配合物发光,类似于[Ru(VI)(ttpy)] [PF6]模型配合物。相反,通过向N