Substituent and Solvent Effects on the Electrochemical Properties and Intervalence Transfer in Asymmetric Mixed‐Valent Complexes Consisting of Cyclometalated Ruthenium and Ferrocene
作者:Si‐Hai Wu、Jiang‐Yang Shao、Hong‐Wei Kang、Jiannian Yao、Yu‐Wu Zhong
DOI:10.1002/asia.201300739
日期:2013.11
display two consecutive redox couples owing to the stepwise oxidation of the ferrocene (Fc) and ruthenium units, respectively. The potential difference, ΔE1/2 (E1/2(RuII/III)−E1/2(Fc0/+)), decreased slightly with increasing solvent donocity. The mixed‐valent states of these complexes have been generated by electrolysis and the resulting intervalence charge‐transfer (IVCT) bands have been analyzed by
四heterodimetallic络合物的[Ru(Fcdpb)(L)](PF 6)(Fcdpb = 2-去质子化的1,3-二(2-吡啶基)-5- ferrocenylbenzene的形式为:L = 2,6-二- (ñ -甲基苯并咪唑基)-吡啶(Mebip),2,2':6',2''-叔吡啶(tpy),4-硝基-2,2':6',2''-吡啶(NO 2 tpy)和三甲基制备了‐4,4',4''-三羧酸盐‐2,2':6',2''-吡啶(Me 3 tctpy))。已在CH 2 Cl 2,CH 3 NO 2,CH 3中检查了这些络合物的电化学和光谱电化学性质。CN和丙酮。由于二茂铁(Fc)和钌单元的逐步氧化,这些配合物显示出两个连续的氧化还原对。电位差ΔE 1/2(E 1/2(Ru II / III)-E 1/2(Fc 0 / +))随着溶剂浓度的增加而略有下降。这些配合物的混合价态是通过电解产生的,