Proton transfer in mixed water-organic solvent solutions: Correlation between rate, equilibrium constant, and the proton free energy of transfer

Ehud Pines, Graham R. Fleming

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

Abstract

We demonstrate that the proton dissociation reaction of excited 1-aminopyrene follows a simple structure-reactivity correlation in water-methanol, water-DMSO, water-dioxane, and water-acetonitrile binary mixtures. The role of the proton free energy of transfer from pure water to the binary mixtures, ΔGtw,s(H+) in determining the rate of transfer is also demonstrated. We have extended our analysis to include neutral ROH type photoacids where the simultaneous creation of the anion during proton transfer affects the energetics of the dissociation reaction in the mixed solvents as compared to pure water.

Original languageEnglish
Pages (from-to)10448-10457
Number of pages10
JournalJournal of Physical Chemistry
Volume95
Issue number25
DOIs
StatePublished - 1 Jan 1991
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering
  • Physical and Theoretical Chemistry

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