Rodlike Bimetallic Ruthenium and Osmium Complexes Bridged by Phenylene Spacers. Synthesis, Electrochemistry, and Photophysics
作者:Steve Welter、Nunzio Salluce、Arianna Benetti、Nicolette Rot、Peter Belser、Prashant Sonar、Andrew C. Grimsdale、Klaus Müllen、Martin Lutz、Anthony L. Spek、Luisa De Cola
DOI:10.1021/ic0483141
日期:2005.6.1
homometallic trisbipyridyl complexes of linear structure with the general formula [M(bpy)3-BL-M(bpy)3]4+ [M = Ru(II) or Os(II); BL = polyphenylenes (2, 3, 4, or 5 units) or indenofluorene; bpy = 2,2'-bipyridine]. By using a "chemistry on the complex" approach, different sizes of rodlike systems have been obtained with a length of 19.8 and 32.5 A for the shortest and longest complex, respectively. For one
在寻找可寻址光的纳米级化合物中,我们合成了10个线性结构的双核同金属三联吡啶基配合物,其通式为[M(bpy)3-BL-M(bpy)3] 4+ [M = Ru(II)或Os (II); BL =聚亚苯基(2、3、4或5个单元)或茚并芴;bpy = 2,2'-联吡啶]。通过使用“复杂物上的化学物质”方法,对于最短和最长的复杂物,已经获得了不同大小的棒状系统,其长度分别为19.8和32.5A。对于钌前体之一[Rubpy-ph2-Si(CH3)3] [PF6] 2,通过在甲醇中重结晶获得单晶。报告了它们的光物理和电化学性质。由于扩展的离域作用,所有化合物在室温和低温下均具有长激发态寿命的发光。纳秒瞬态吸收表明,最低激发态涉及与桥连配体相连的螯合单元。电化学数据表明,第一次还原的电势比参考配合物[M(bpy)3] 2+(M = Ru,Os)略高。该结果证实了最佳的受体是与共轭间隔基连接的联吡啶部分。