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.
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Hidalgo, J., Carmona, C., Balón, M. et al. Fluorescence of harmol, harmalol and 2-hydroxycarbazole in concentrated hydroxide solutions. Pharmaceutisch Weekblad Scientific Edition 12, 142–144 (1990). https://doi.org/10.1007/BF01970154
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DOI: https://doi.org/10.1007/BF01970154