Covering the More Visible Region by Electrochemical Copolymerization of Carbazole and Benzothiadiazole Based Donor-Acceptor Type Monomers

作     者：Emine Gul Cansu-Ergun Emine Gul Cansu-Ergun

作者机构：Department of Electrical and Electronics Engineering Baskent University 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2019年第37卷第1期

页      面：28-35页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：I would like to thank and appreciate Prof. Dr. Ahmet Muhtar Onal (Department of Chemistry  Middle East Technical University  Turkey) for his academic guidance and support 

主　　题：Electrochemical polymerization Copolymer Electrochromic polymers 

摘      要：An electrochromic copolymer film of 2-(3,3-dihexyl-3,4-dihydro-2 H-thieno[3,4-b][1,4]dioxepin-6-yl)-7-(3,3-dihexyl-3,4-dihydro-2 H-thieno[3,4-b][1,4]dioxepin-8-yl)-9 H-carbazole(M1) and 4,7-bis(thiophen-2-yl)benzo[c][1,2,5]thiadiazole(M2) was prepared via electrochemical technique. The copolymerization was performed with one to one monomer feed ratio. Electrochemical and optical properties of the resulting copolymer film(P3) and the homopolymer films of M1 and M2(P1 and P2) were investigated by using cyclic voltammetry and UV-Vis spectrometry techniques, and the corresponding results were compared. Incorporation of M1 and M2 into copolymer matrix was clearly observed on the resulting cyclic voltammograms and UV-Vis spectra. P3 covered the visible regions coming from both P1 and P2, and exhibited a neutral state darker color than those of homopolymers. P3 film was found to have a multichromic behavior, appearing as brown in its neutral state while changing its color upon oxidation to dark-gray(at about 0.3 V), to blue(at about 0.6 V) and finally to grayish cyan(beyond 0.9 V), with a corresponding optical band gap of 1.65 eV.