Tuning the electroactivity of conductive polymer at physiological pH

Journal ar
Electrochimica Acta
  • Volumen: 52
  • Número: 9
  • Fecha: 15 febrero 2007
  • Páginas: 2978-2986
  • ISSN: 00134686
  • Tipo de fuente: Revista
  • DOI: 10.1016/j.electacta.2006.09.031
  • Tipo de documento: Artículo
This article studies the synthesis and properties of copolymers of aniline and both 2-amino (2ABSA) and 3-aminobenzenesulfonic acids (3ABSA) with a molar degree of sulfonation from 3 to 33% for 3ABSA and 10 to 43% for 2ABSA. The small segments of the sulfonic species in the polymer chain (molar fraction = 0.03) confer solubility in alkaline medium (around 0.012 g L-1) and good electrochemical response at pH 7.2 improving those for the unmodified polyaniline (PANI). Taking advantage of the electroactivity at physiological pH, the electrochemical response of redox couples (ferrocyanide(II)/ferricyanide(III) and ferrocene/ferrocenium) has been analysed. The electrochemical response of Cytochrome c (Cyt c) solutions has been also studied at pH 7.2 in presence and absence of ferrocene/ferrocenium species. © 2006 Elsevier Ltd. All rights reserved.

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