Electrochemical polymerization and characterization of new copolymers of 3-substituted thiophenes

被引：24

作者：

Alves, Marcos R. A. ^{[1
]}

Calado, Hallen D. R. ^{[1
]}

Donnici, Claudio L. ^{[1
]}

Matencio, Tulio ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Quim, BR-31270901 Belo Horizonte, MG, Brazil

来源：

SYNTHETIC METALS | 2010年 / 160卷 / 1-2期

关键词：

Conjugated polymers; Copolymers; 3-Substituted thiophenes; Photoluminescence; Cyclic voltammetry; ELECTROCHROMIC PROPERTIES; CONDUCTING POLYMERS; POLY(THIOPHENE-3-METHANOL); 3,4-ETHYLENEDIOXYTHIOPHENE; 3-METHOXYTHIOPHENE; NUCLEATION; GROWTH;

D O I：

10.1016/j.synthmet.2009.09.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work presents the electrochemical synthesis and characterization of 3-substituted thiophene conducting copolymers suitable for applications in electrochromic displays. The 3-methoxythiophene (MOT), 3-thiophenemethanol (TM), 3-thiopheneethanol (TE) and 3-thiophenecarboxylic acid (TCA) monomers showed oxidation potentials at 1.1, 1.5, 1.5 and 1.8V/SCE, respectively. Copolymers containing MOT (PMOT-co-TE, PMOT-co-TM and PMOT-co-TCA) were synthesized by oxidative electropolymerization and characterized by GPC, FTIR, UV-vis and cyclic voltammetry. The copolymers were found to be soluble in acetonitrile. N,N-dimethylformamide and N,N-dimethylsulfoxide. PMOT. PMOT-co-TE and PMOT-co-TCA showed a dependence of the anodic potential on the scan rate and a quasi-reversible profile. PMOT-co-TM showed an irreversible electrochemical profile. PMOT and PMOT-co-TE were the most electroactive polymers. The oxidation potentials vs. SCE of PMOT, PMOT-co-TE, PMOT-co-TM and PMOT-co-TCA were 0.22. 0.30, 1.16 and 0.20 V/SCE at 50 mV s(-1), respectively. The copolymers deposited on ITO showed reversible color variation between blue in the oxidized state to orange when reduced, demonstrating their potential for electrochromic applications. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：22 / 27

页数：6

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