Design, synthesis and characterization of a novel self-doped polyaniline derivative

Author： Liu Hongtao Chao Danming Liu Xincai Jia Xiaoteng He Libing Cui Lili Yao Lei Wang Ce

ISSN： 1097-0126

Source： Polymer International, Vol.60, Iss.5, 2011-05, pp. : 725-729

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Abstract

A type of self-doped polyaniline derivative was successfully synthesized using an oxidative coupling polymerization approach. The structure of the electroactive polymer was investigated using Fourier transform infrared and ¹H NMR spectroscopy and gel permeation chromatography. Its thermal and spectral properties were characterized using thermogravimetric analysis and UV-visible spectroscopy. The electrochemical activity of the polymer was studied using cyclic voltammetry (CV) in 1.0 mol L⁻¹ H₂SO₄ solution with various scan rates. The peak current increases linearly with scan rate from 10 to 120 mV s⁻¹, which indicates that the electrode reaction is controlled by a surface process. In addition, the self-doped characteristic was investigated using CV in 1.0 mol L⁻¹ KCl solution with pH value changing from 1 to 12, and the results indicate that the polymer has excellent electrochemical activity even in neutral and alkaline environments. Copyright © 2010 Society of Chemical Industry