Acid hydrolyses of hydrophobic dioxolanes in cationic micelles: A quantitative treatment based on the Poisson-Boltzmann equation

Andre Blasko, Clifford A. Bunton, Cathy Armstrong, Walter Gotham, Zhen Min He, Jackie Nikles, Laurence S. Romsted

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Acid hydrolyses of hydrophobic dioxolanes, 1a and 1b, are inhibited by cationic micelles of myristyl- and cetyltrimethylammonium halides, MTAX and CTAX, respectively (X = Cl, Br), but at surfactant concentrations sufficient to bind all the substrate, first-order rate constants, kψ, at constant [HX], increase with increasing [surfactant] and on addition of NaX. In the absence of added NaX kψ increases linearly with [MTAX] and [CTACl], but at constant [surfactant] there are breaks in plots of kψ against [NaX]. These results can be explained quantitatively in terms of a pseudophase model in which hydrogen ion concentrations at micellar surfaces are calculated by solution of the Poisson-Boltzmann equation.

Original languageEnglish (US)
Pages (from-to)6747-6750
Number of pages4
JournalJournal of physical chemistry
Volume95
Issue number18
DOIs
StatePublished - 1991

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

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