Electrochemistry of Methylviologen in the Presence of Sodium Decyl Sulfate

Pablo A. Quintela, Angel E. Kaifer

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

The reductive electrochemistry of methylviologen was surveyed in the presence of sodium decyl sulfate (SdecS) at concentration levels below and above the critical micelle concentration (cmc) of this anionic surfactant. The SdecS micelles were found to increase the equilibrium constant for the conproportionation reaction as compared to the value obtained in surfactant-free solution. Absorption spectra showed that the equilibrium constant for dimerization of the cation radical is notably lowered by the micelles. In contrast to this, the dimerization of the cation radical is remarkably enhanced by the surfactant system at low micelle concentrations, i. e. , at concentrations of surfactant slightly above the cmc. The adsorption behavior of the cation radical on the electrode surface at SdecS concentrations under the cmc was also investigated.

Original languageEnglish (US)
Pages (from-to)769-773
Number of pages5
JournalLangmuir
Volume3
Issue number5
DOIs
StatePublished - Sep 1 1987

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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