Excited-state proton transfer in gas-expanded liquids: the roles of pressure and composition in supercritical CO2/methanol mixtures

Rui M D Nunes; Luis G Arnaut; Kyril M Solntsev; Laren M Tolbert; Sebastião J Formosinho

doi:10.1021/ja052416o

Excited-state proton transfer in gas-expanded liquids: the roles of pressure and composition in supercritical CO2/methanol mixtures

J Am Chem Soc. 2005 Aug 31;127(34):11890-1. doi: 10.1021/ja052416o.

Authors

Rui M D Nunes¹, Luis G Arnaut, Kyril M Solntsev, Laren M Tolbert, Sebastião J Formosinho

Affiliation

¹ Department of Chemistry, University of Coimbra, 3000 Coimbra, Portugal.

PMID: 16117498
DOI: 10.1021/ja052416o

Abstract

Excited-state proton transfer from 5,8-dicyano-2-naphthol to methanol takes place in CO2/methanol mixtures, in the pressure and temperature ranges of supercritical CO2. The efficiency of the proton-transfer step decreases with the pressure. This is assigned to the perturbation of the methanol clusters solvating the naphthol.