文献类型：会议论文

英文题名：Near infrared electrochromic naphthalene-based polyimides containing triarylamine: Synthesis and electrochemical properties

作者：Cai, Jiwei[1];Ma, Lina[1];Niu, Haijun[1];Zhao, Ping[2,3];Lian, Yongfu[1];Wang, Wen[4]

机构：[1]Heilongjiang Univ, Sch Chem & Chem Engn & Mat, Dept Macromol Mat & Engn, Key Lab Funct Inorgan Mat Chem,Minist Educ, Harbin 150086, Peoples R China;[2]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[4]Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150080, Peoples R China

会议论文集：12th International Fischer Symposium

会议日期：JUN 03-07, 2012

会议地点：Lubeck, GERMANY

语种：英文

外文关键词：Triphenylamine; Electrochromism; Polyimides; Electrochemistry

摘要：A series of novel multicolored near-infrared (NIR) electrochromic aromatic polyimides (PIs) have been synthesized by a conventional two-step polymerization process. The structures of PIs were characterized by means of Fourier transform infrared (FTIR), H-1 NMR spectroscopy, which showed an agreement with the proposed structure. These poly (amic acid)s have inherent viscosities of 0.75-0.84 dl/g. They are readily soluble in many organic solvents, such as N-methyl-2-pyrrolidone (NMP), dimethylacetamide (DMAc), N,N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO). All PIs displayed outstanding thermal stabilities, i.e. 5% wt loss in excess of 480 degrees C under nitrogen. The highest-occupied molecular orbital (HOMO) and lowest-unoccupied molecular orbital (LUMO) energy levels of these PIs were determined in the range of -4.95 to -5.00 and -1.97 to -2.01 eV (vs the vacuum level) by cyclic voltammetry method which were consisting with the results of quantum chemical calculation well, respectively. All obtained PIs revealed stability of electrochromic characteristics, changing color from original yellowish to red and blue. In addition, the PIs films showed high coloration efficiency (CE), short switching time, and anodic electrochromic behavior. The properties prove that the PIs are multipurpose materials which will be subject of hole-transporting and electrochromic application in the near future. (C) 2013 Elsevier Ltd. All rights reserved.