Potentiometric behavior of electrodes based on overoxidized polypyrrole films

Arzu Ersöz, Vasilis G. Gavalas, Leonidas G. Bachas

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

Electrodes based on oxidized polypyrrole films have potentiometric selectivity toward anions. When the films are overoxidized, however, electron-rich groups are introduced on to the polymer chains, reversing the selectivity of the electrodes from anionic to cationic. In this study, electrochemically overoxidized polypyrrole film electrodes were prepared, and the conditions for film formation that lead to near-Nernstian potentiometric response were investigated. It was found that the doping ion, overoxidation solution, and pH affect the response of these electrodes. Redox interference is significantly lower for the overoxidized polypyrrole films than for polypyrrole electrodes.

Original languageEnglish (US)
Pages (from-to)786-790
Number of pages5
JournalAnalytical and bioanalytical chemistry
Volume372
Issue number7-8
DOIs
StatePublished - May 20 2002
Externally publishedYes

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Keywords

  • Overoxidized polypyrrole
  • Potentiometric behavior
  • Templating effect

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry

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