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Type: Artigo de periódico
Title: Influence of dopant, pH and potential on the spectral changes of poly(o-methoxyaniline): relationship with the redox processes
Author: Gazotti, WA
Jannini, MJDM
de Torresi, SIC
De Paoli, MA
Abstract: Poly(o-methoxyaniline) films doped with functionalized acids show high solubility in conventional organic solvents and a high optical contrast between the reduced and the oxidized forms. They are also more stable towards thermal treatment than when they are doped with HCl. These characteristics make them suitable for use in electrochromic displays. The electrochromic behavior of this soluble derivative of polyaniline was investigated in detail by comparing the curves obtained by the differentiation of absorbance at fixed wavelengths with simultaneously obtained voltammograms. This analysis allows the chromophore species producing color changes to be related to the redox processes taking place during the electrochemical cycling. Molar absorptivities were calculated and the effect of pH on the absorption spectra of the emeraldine form of the polymer is also reported. (C) 1997 Elsevier Science S.A.
Subject: poly(o-methoxyaniline)
pH effect
Country: Suíça
Editor: Elsevier Science Sa
Citation: Journal Of Electroanalytical Chemistry. Elsevier Science Sa, v. 440, n. 41671, n. 193, n. 199, 1997.
Rights: fechado
Identifier DOI: 10.1016/S0022-0728(97)80056-3
Date Issue: 1997
Appears in Collections:Unicamp - Artigos e Outros Documentos

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