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Excited-state proton transfer spectroscopy of 3-hydroxypicolinamide

✍ Scribed by Shannon L. Studer; Pi-Tai Chou; Dale McMorrow

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 601 KB
Volume: 161
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)85099-7

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✦ Synopsis

A rapid intramolecular proton transfer is observed in the lowest excited singlet state of 3-hydroxypicolinamide. A temperatureindependent tautomerization rate of > 2X lOI s-' is deduced from steady-state and picosecond fluorescence measurements at both room temperature and 77 K. The lack of any detectable temperature dependence is indicative of a negligible barrier to tautomerization.

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