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Issue 10, 2014
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Bimetallic ruthenium complexes bridged by divinylphenylene bearing oligo(ethylene glycol)methylether: synthesis, (spectro)electrochemistry and the lithium cation effect

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Abstract

A series of 1,4-disubstituted ruthenium–vinyl complexes, (E,E)-[{(PMe3)3(CO)ClRu}2(μ-HC[double bond, length as m-dash]CH–Ar–CH[double bond, length as m-dash]CH)], 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 by X-ray crystallography. The electronic properties of the complexes were investigated by cyclic voltammetry, and IR and UV-vis/NIR spectroscopies. Electrochemical studies showed that the 2,5-substituents better stabilized the mixed-valence states; the electrochemical behavior was greatly affected by lithium cations, especially complex 1g with 2,3-substituents, which was further supported by IR and UV-vis/NIR spectra changes. Spectroelectrochemical studies showed that the redox chemistry was dominated by the non-innocent character of the bridging fragment.

Graphical abstract: Bimetallic ruthenium complexes bridged by divinylphenylene bearing oligo(ethylene glycol)methylether: synthesis, (spectro)electrochemistry and the lithium cation effect

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Publication details

The article was received on 27 Sep 2013, accepted on 23 Dec 2013 and first published on 03 Jan 2014


Article type: Paper
DOI: 10.1039/C3DT52677A
Dalton Trans., 2014,43, 4093-4101

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    Bimetallic ruthenium complexes bridged by divinylphenylene bearing oligo(ethylene glycol)methylether: synthesis, (spectro)electrochemistry and the lithium cation effect

    L. Y. Tian, Y. M. Liu, G. Tian, X. H. Wu, Z. Li, J. Kou, Y. Ou, S. H. Liu and W. Fu, Dalton Trans., 2014, 43, 4093
    DOI: 10.1039/C3DT52677A

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