Bimetallic ruthenium complexes bridged by divinylphenylene bearing oligo(ethylene glycol)methylether: synthesis, (spectro)electrochemistry and the lithium cation effect
作者:Li Yan Tian、Yuan Mei Liu、Guang-Xuan Tian、Xiang Hua Wu、Zhen Li、Jun-Feng Kou、Ya-Ping Ou、Sheng Hua Liu、Wen-Fu Fu
DOI:10.1039/c3dt52677a
日期:——
A series of 1,4-disubstituted ruthenium–vinyl complexes, (E,E)-[(PMe3)3(CO)ClRu}2(μ-HCCH–Ar–CHCH)], in which the 1,4-diethenylphenylene bridge bears two oligo(ethylene glycol)methyl ether side chains at different positions (2,5- and 2,3-positions), were prepared. The respective products were characterized by elemental analyses and NMR spectroscopy. The structures of complexes 1b and 1e were established
一系列1,4-二取代的钌-乙烯基络合物((E,E)-[PMe 3)3(CO)ClRu} 2(μ- HCCH –Ar–CH CH)],其中1,制备了4-二乙烯基亚苯基桥,其在不同位置(2,5-和2,3-位)带有两个寡(乙二醇)甲基醚侧链。通过元素分析和NMR光谱表征各自的产物。配合物1b和1e的结构通过X射线晶体学确定。通过循环伏安法,红外光谱和紫外可见/近红外光谱研究了配合物的电子性质。电化学研究表明,2,5-取代基可以更好地稳定混合价态。锂阳离子对电化学行为的影响很大,尤其是1g与2,3-取代基的配合物,红外和紫外-可见/近红外光谱的变化进一步支持了这种行为。光谱电化学研究表明,氧化还原化学主要是由桥接片段的非清纯特性决定的。