Journal
CHEMICAL PHYSICS LETTERS
Volume 412, Issue 1-3, Pages 228-234Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2005.07.001
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Excited state proton transfer of pyranine (8-hydroxypyrene-1,3,6-trisulfonate, HPTS) in gamma-cyclodextrin (gamma-CD) is studied using picosecond and femtosecond fluorescence spectroscopy. It is shown that confinement of pyranine in gamma-CD cavity accelerates recombination of the geminate ion pair and slows down the initial proton transfer step and the dissociation of the geminate ion pair. This results in enhanced emission from the protonated species. (c) 2005 Elsevier B.V. All rights reserved.
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