Further Study on the Forms of Umbelliferone in Excited State
Open Access
- 1 November 1978
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 33 (11) , 1307-1311
- https://doi.org/10.1515/zna-1978-1108
Abstract
Absorption and emission spectra of umbelliferone in ethanol-water solution are studied in a wide range of water content. No variations in the absorption spectra were found, whereas the emission spectra proved to be highly sensitive to the volume percentage of water. An interpretation is attempted on the basis of electron density calculations by the SCF PPP CI method for the molecule of umbelliferone and a hypothetical tautomer.Keywords
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