文献类型：期刊文献

英文题名：Multicolored near-infrared electrochromic polyimides: Synthesis, electrochemical, and electrochromic properties

作者：Cai, Jiwei[1];Niu, Haijun[1];Zhao, Ping[2];Ji, Yan[1];Ma, Lina[1];Wang, Cheng[1];Bai, Xuduo[1];Wang, Wen[3]

机构：[1]Heilongjiang Univ, Sch Chem Engn & Mat, Minist Educ, Key Lab Funct Inorgan Mat Chem, Harbin 150086, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150080, Peoples R China

年份：2013

卷号：99

期号：3

起止页码：1124

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20134016804720);WOS:【SCI-EXPANDED(收录号:WOS:000327560200080)】；

基金：The authors are grateful to the support of the National Science Foundation of China (Grant No. 51373049, 51372055, 51303045, 51273056, 21372067), Doctoral Fund of Ministry of Education of China, Foundation of Heilongjiang Education Bureau (12531504), Foundation of Heilongjiang University Innovator Group (No. hdtd-2010-11).

语种：英文

外文关键词：Triphenylamine; Electrochromism; Polyimides; Near-infrared; Functional dyes; Coloration efficiency

摘要：A novel series of multicolored near-infrared electrochromic aromatic polyimides have been synthesized by a conventional two-step polymerization process. All polymers displayed outstanding thermal stability, i.e. 20 wt% loss in excess of 593 degrees C in nitrogen and high char yields (higher than 68% at 750 degrees C). In addition, the polymer films showed reversible electrochemical oxidation, high coloration efficiency, low switching time, and anodic green electrochromic behaviors. The Highest Occupied Molecular Orbital (HOMO) and Lowest Unoccupied Molecular Orbital (LUMO) energy levels of these polymers were determined in the range of -4.759 to -4.801 and -1.758 to -2.002 eV (vs the vacuum level) by cyclic voltammetry method consisting with the results of quantum chemical calculation well, respectively. The polymer films revealed excellent stability of electrochromic characteristics for the radical cations generated, changing color from original yellowish to green and blue, with the absorption changing from ultraviolet to near-infrared. (C) 2013 Elsevier Ltd. All rights reserved.