Enhanced kinetic inertness in the electrochemical interconversion of Cu(i) double helical to Cu(ii) monomeric complexes
作者:Piersandro Pallavicini、Massimo Boiocchi、Giacomo Dacarro、Carlo Mangano
DOI:10.1039/b700488e
日期:——
behaviour similar to that of their analogues that contain unsubstituted quinolines, forming a bistable system with copper. [Cu2L2]2+ helicates are obtained with Cu+ and [CuL]2+ monomers with Cu2+, as shown by UV/Vis titrations, determination of complex formation constants, mass and NMR measurements, and X-ray crystallographic analysis. The OR groups are found to be non-coordinating, but the presence of such
三个新 配体 由两个制成 亚氨基喹啉已经合成了由(R,R)-反--1,2-环己二烯间隔基分隔的两半。这些配体特征–OR功能附加在喹啉环的8位上(R =正烷基)。这配体 表现出类似于未取代的类似物的行为 喹啉,与铜形成双稳态系统。用Cu +和[Cu L ] 2+单体和Cu 2+获得[Cu 2 L 2 ] 2+螺旋体,如UV / Vis滴定法,测定络合物形成常数,质量和核磁共振 测量值,以及 X射线晶体学分析。发现OR基团是非配位的,但是在喹啉环上这种取代基的存在减慢了[Cu 2 L 2 ] 2+到[Cu L ] 2+的电化学互变。特别是,氧化作用的[Cu 2 L 2 ] 2+给出了可逆的两步曲线循环伏安法实验中,由于形成了Cu 2+螺旋体[Cu 2 L 2 ] 4+,因此在CV实验时间范围内不会演变为[Cu L ] 2+。