Kinetic study of the reaction of leuco methylene blue with 2,6-dimethyl-p-benzoquinone in a reverse micellar system

Daisuke Usui, Yoshimi Sueishi, Shunzo Yamamoto

Research output: Contribution to journalArticle

Abstract

The kinetics of the reaction of leuco methylene blue (MBH) with 2,6-dimethyl-p-benzoquinone (DMBQ) were studied in a heptane/bis(2-ethylhexyl)- sulfosuccinate (AOT)/water reverse micellar system. The pseudo-first-order rate constant (k obsd) obtained in the presence of excess of DMBQ was found to be proportional to the initial concentration of DMBQ for W 0=3, 5, 10, 15 and 20 (W 0=[H2O]/[AOT]). The second-order rate constant (k 2=k obsd/[DMBQ]0) increased with an increase in the W 0 value, but was almost independent of the concentration of the water pool. A mechanism involving the distribution of DMBQ between the reverse micellar interface and bulk organic solvent was proposed to explain these findings.

Original languageEnglish
Pages (from-to)1005-1014
Number of pages10
JournalJournal of Solution Chemistry
Volume37
Issue number7
DOIs
Publication statusPublished - Jul 2008

Keywords

  • AOT
  • Kinetics
  • Leuco methylene blue
  • Oxidation
  • Reverse micelle
  • Water pool

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Physical and Theoretical Chemistry

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