Excited-state proton transfer and geminate recombination in the molecular cage of β-cyclodextrin

Young-Shin Lee; Oh-Hoon Kwon; Han Park; Jan Franz; Du-Jeon Jang

doi:10.1016/j.jphotochem.2007.07.021

Excited-state proton transfer and geminate recombination in the molecular cage of β-cyclodextrin

Abstract

Excited-state proton transfer and geminate recombination in aqueous heptakis(2,6-di-O-methyl)-β-cyclodextrin have been compared with those in water by monitoring the photoinduced prototropic tautomerization of 6-hydroxyquinoline, which occurs via forming anionic intermediate. Enol deprotonation decelerates by 18 times whereas its reverse process accelerates slightly with encapsulation. The imine protonation of the intermediate slows down by 8.2 times in the molecular cage. These unusual kinetic features have been explained with the geminate recombination of protons as well as the structural dynamics of solvent molecules and the relative energetics of involved species.

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Authors (5)

Young-Shin Lee
- Seoul National University School of Chemistry
Oh-Hoon Kwon
- Seoul National University School of Chemistry
Han Park
- Seoul National University School of Chemistry
Jan Franz dr hab.
- University College London Department of Physics and Astronomy
Du-Jeon Jang
- Seoul National University School of Chemistry

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY no. 194, edition 1, pages 105 - 109,
ISSN: 1010-6030
Language:: English
Publication year:: 2008
Bibliographic description:: Lee Y., Kwon O., Park H., Franz J., Jang D.: Excited-state proton transfer and geminate recombination in the molecular cage of β-cyclodextrin// JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY. -Vol. 194, iss. 1 (2008), s.105-109
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.jphotochem.2007.07.021
Verified by:: Gdańsk University of Technology