Near-Infrared Electrochromism in Electropolymerized Metallopolymeric Films of a Phen-1,4-diyl-Bridged Diruthenium Complex
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- 作者：Hai-Jing Nie ; Yu-Wu Zhong
- 刊名：Inorganic Chemistry
- 出版年：2014
- 出版时间：October 20, 2014
- 年：2014
- 卷：53
- 期：20
- 页码：11316-11322
- 全文大小：452K
- ISSN：1520-510X
文摘
A phen-1,4-diyl-bridged tris-bidentate diruthenium complex 3(PF6)2, [Ru2(dpb)(vbpy)4](PF6)2, has been designed and prepared, where dpb is 1,4-di(pyrid-2-yl)benzene and vbpy is 5-vinyl-2,2鈥?bipyridine. Upon reductive electropolymerization, metallopolymeric thin films of this complex have been deposited on platinum and ITO glass electrode surfaces. These films display two well-separated redox couples at +0.16 and +0.60 V versus Ag/AgCl. In the mixed-valent state, these films display intense intervalence charge transfer absorptions around 1300 nm. The electrochromic behavior at this wavelength has been examined by spectroelectrochemical measurements and double-potential-step chronoamperometry. A highest optical contrast ratio of 41% at 1300 nm with a coloration efficiency of 200 cm2/C has been achieved. The electrochromic behavior is highly dependent on the surface coverage. The highest contrast ratio was obtained with a film of 6.0 脳 10鈥? mol/cm2. In addition, a monoruthenium complex 2(PF6), [Ru(dpb)(vbpy)2](PF6), has been prepared and electropolymerized for a comparison study.