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Fluorescence of harmol, harmalol and 2-hydroxycarbazole in concentrated hydroxide solutions
J Hidalgo1, C Carmona, M Balón
1Department of Physical Chemistry, Faculty of Pharmacy, University of Sevilla, Spain.
Pharmaceutisch Weekblad. Scientific Edition
|August 24, 1990
Abstract:
Room temperature electronic absorption and fluorescence spectra of harmol, harmalol and 2-hydroxycarbazole have been obtained in concentrated aqueous potassium hydroxide solutions. The appearance of a new fluorescence band for all these compounds in media of H- greater than 16, has been ascribed to the emission of excited dianions formed by deprotonation. Acidity constants have been estimated from the Föster-Weller method.