Unusual Temperature Dependence of Excited State Proton Transfer Rates in Alcohols

Boiko Cohen, Dan Huppert

Research output: Contribution to journalArticlepeer-review

Abstract

The reversible proton dissociation and geminate recombination of photoacids is studied as a function of temperature in alcohols. For this purpose we used a strong photoacid 5,8-dicyano-2-naphthol (DCN2) (pK*a ∼ -4.5 in water) that is capable to transfer a proton to alcohols. The experimental data are analyzed by the Debye-Smoluchowski equation solved numerically with boundary conditions to account for the reversibility of the reaction. We propose a qualitative model to describe the unusual temperature dependence of the proton-transfer rate constant in alcohols in the liquid phase.

Original languageEnglish
Pages (from-to)2663-2667
Number of pages5
JournalJournal of Physical Chemistry A
Volume104
Issue number12
DOIs
StatePublished - 2000

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