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题名: Multistate Redox Switching and Near-Infrared Electrochromism Based on a Star-Shaped Triruthenium Complex with a Triarylamine Core
作者: Tang, Jian-Hong1, 2; He, Yan-Qin1; Shao, Jiang-Yang1; Gong, Zhong-Liang1; Zhong, Yu-Wu1, 2
刊名: SCIENTIFIC REPORTS
发表日期: 2016-10-12
卷: 6
收录类别: SCI
英文摘要: A star-shaped cyclometalated triruthenium complex 2(PF6)(n) (n = 3 and 4) with a triarylamine core was synthesized, which functions as a molecular switch with five well-separated redox states in both solution and film states. The single-crystal X-ray structure of 2(PF6)(3) is presented. This complex displays four consecutive one-electron redox waves at + 0.082, + 0.31, + 0.74, and + 1.07 V vs Ag/AgCl. In each redox state, it shows significantly different NIR absorptions with lambda(max) of 1590 nm for 2(4+), 1400 nm for 2(5+), 1060 nm for 2(6+), and 740 nm for 2(7+), respectively. Complex 2(4+) shows a single-line EPR signal at g = 2.060, while other redox states are all EPR inactive. The spin density distributions and NIR absorptions in different redox states were rationalized by DFT and TDDFT calculations. A vinyl-substituted triruthenium analogous 3(PF6)(4) was prepared, which was successfully polymerized on ITO glass electrode surfaces by reductive electropolymerization. The obtained poly-3(n+)/ITO film was characterized by FTIR, AFM, and SEM analysis. It shows four well-defined redox couples and reversible multistate NIR electrochromism. In particular, a contrast ratio (Delta T%) up to 63% was achieved at the optic telecommunication wavelength (1550 nm).
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35676
Appears in Collections:光化学实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, CAS Key Lab Photochem, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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