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Hydrogen/deuterium isotope effects on the excited-state proton transfer kinetics of 3-hydroxyflavone

✍ Scribed by A.J.G. Strandjord; P.F. Barbara

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 631 KB
Volume: 98
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(83)80194-8

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✦ Synopsis

The static and transient fluorescence spectroscopy of 3-hydroxyflavone, 3HF, has been investigated as a function of deuteration of the 3-hydroxy group and the solvent. Small H/D isotope effects are observed for at least two of the simple rate constants for the excited-state dynamics. The isotope effects are not significantly temperature dependent. The results suggest that the proton transfer process is not a simple barrier crossing reaction.

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