Polysulfonium as a new electrode-modifying polyelectrolyte

K. Oyaizu, H. Nakano, J. Natori, E. Tsuchida

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A new type of cationic polyelectrolyte, poly(methylsulfonio-1,4-phenylenethio-1,4-phenylene trifluoromethanesulfonate), that adheres to a glassy carbon electrode surface has been employed to bind a ferricyanide anion to the electrode surface from electrolyte solutions. The complex incorporated by the polyelectrolyte shows significant shifts in formal potential to less positive values due to the stronger binding of ferricyanide by the polycation coating than that of ferrocyanide. The apparent formal potential for the incorporated ferricyanide/ferrocyanide redox couple changes as the concentration of supporting electrolyte is varied. The polycation coating is anion-permselective when a methanesulfonate is used as a supporting electrolyte.

Original languageEnglish
Pages (from-to)232-236
Number of pages5
JournalJournal of Electroanalytical Chemistry
Volume498
Issue number1-2
DOIs
Publication statusPublished - 2001 Feb 16

Keywords

  • Modified electrode
  • Polyelectrolyte
  • Redox potential

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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