Nie Hai-Jing, Zhong Yu-Wu
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , 2 Bei Yi Jie, Zhong Guan Cun, Beijing 100190, People's Republic of China.
Inorg Chem. 2014 Oct 20;53(20):11316-22. doi: 10.1021/ic5019967. Epub 2014 Oct 9.
A phen-1,4-diyl-bridged tris-bidentate diruthenium complex 3(PF6)2, Ru2(dpb)(vbpy)42, has been designed and prepared, where dpb is 1,4-di(pyrid-2-yl)benzene and vbpy is 5-vinyl-2,2'-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 cm(2)/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 × 10(-9) mol/cm(2). In addition, a monoruthenium complex 2(PF6), Ru(dpb)(vbpy)2, has been prepared and electropolymerized for a comparison study.
已设计并制备了一种1,4 - 亚苯基桥连的三双齿二钌配合物3(PF6)2，即Ru2(dpb)(vbpy)42，其中dpb为1,4 - 二(吡啶 - 2 - 基)苯，vbpy为5 - 乙烯基 - 2,2'- 联吡啶。通过还原电聚合，该配合物的金属聚合物薄膜已沉积在铂和ITO玻璃电极表面。相对于Ag/AgCl，这些薄膜在 +0.16 V和 +0.60 V处显示出两个分离良好的氧化还原对。在混合价态下，这些薄膜在1300 nm左右显示出强烈的价间电荷转移吸收。通过光谱电化学测量和双电位阶跃计时电流法研究了该波长下的电致变色行为。在1300 nm处实现了41%的最高光学对比度，着色效率为200 cm(2)/C。电致变色行为高度依赖于表面覆盖率。在6.0×10(-9) mol/cm(2)的薄膜中获得了最高对比度。此外，还制备并电聚合了一种单钌配合物2(PF6)，即Ru(dpb)(vbpy)2，用于比较研究。
