Electrochemical and electrochromic properties of P(carbazole-EDOT)Derivatives and its copolymer film with EDOT units
作者单位：The Key Laboratory of Rare Earth Functional Materials and Applications Zhoukou Normal University
会议名称：《河南省化学会2016年学术年会》
会议日期：2016年
学科分类：081704[工学-应用化学] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
关 键 词：Conductive polymers Electrochromism Carbazole
摘 要：Conductive polymers have attracted much attentions due to their potential applications in the fields of organic photovoltaics(OPVs), organic field effect transistors(OFETs), organic light-emitting diodes(OLEDs) or electrochromic devices(ECDs). As for electrochromic application, conjugated polymers possess numerous advantages such as facile synthetic access, vivid colours, fast response time environmental stability and solution processability. In this manuscript,4-[3,6-Bis-(2,3-dihydro-thieno[3,4-b][1,4]dioxin-5-yl)-carbazol-9-yl]-benzoic acid ethyl ester(BCBA)was synthesized by simple chemical route, and its homopolymer and copolymer with 3,4-ethoxylene dioxy thiophene(EDOT) were obtained by electrochemical methods, and their structure and performance properties were characterized by NMR, MS, FT-IR, UV-vis spectroscopy and electrochemical station. The electrochemical results show that both the polymer display well-define electrochemical response. Spectroelectrochemical technique were performed to investigate the electrochemical and optical changes of the resulting polymer films, the bandgap of PBCBA films is found to be 2.52 eV, it can show yellow-green and purple color at different applied potentials, while P(BCBA-EDOT) films exhibit brown, green blue colors due to the existence of EDOT units, and its bandgap is 1.68 eV. What is more, both the polymer hold good optical contrast and response time,which make them potential application for ECDs.