- Bimetallic ruthenium complexes bridged by divinylphenylene bearing oligo(ethylene glycol)methylether: Synthesis, (spectro)electrochemistry and the lithium cation effect
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A series of 1,4-disubstituted ruthenium-vinyl complexes, (E,E)-[{(PMe 3)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 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.
- Tian, Li Yan,Liu, Yuan Mei,Tian, Guang-Xuan,Wu, Xiang Hua,Li, Zhen,Kou, Jun-Feng,Ou, Ya-Ping,Liu, Sheng Hua,Fu, Wen-Fu
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p. 4093 - 4101
(2014/03/21)
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