Femtosecond to nanosecond solvation dynamics in pure water and inside the γ-cyclodextrin cavity

Štefan Vajda, Ralph Jimenez, Sandra J. Rosenthal, Vlastimil Fidler, Graham R. Fleming, Ed Castner

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Abstract

The dynamics of solvation of an excited chromophore in pure water and in a restricted space with a limited number of water molecules have been studied. The time-dependent Stokes shift of Coumarin 480 (C480) and Coumarin 460 (C460) were measured using femtosecond fluorescence upconversion and time-correlated single-photon-counting techniques. The system with a limited number of water molecules was an inclusion complex of Coumarin dyes with γ-cyclodextrin (γCD). The results of molecular dynamics simulations are compared with the observed solvent response in pure water and in the γCD cavity. The observed relaxation times range from

Original languageEnglish
Pages (from-to)867-873
Number of pages7
JournalJournal of the Chemical Society - Faraday Transactions
Volume91
Issue number5
DOIs
Publication statusPublished - 1995

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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