Determination of the First Excited Singlet State Dipole Moments of Coumarins by the Solvatochromic Method
- 1 May 1994
- journal article
- research article
- Published by Taylor & Francis Ltd in Spectroscopy Letters
- Vol. 27 (4), 439-449
- https://doi.org/10.1080/00387019408007249
Abstract
The electronic absorption and fluorescence spectra of 4-hydroxycoumarin, 7-hydroxycoumarin, 7-methoxycoumarin, 7-hydroxy-4-methylcoumarin, 7-amino-4-methylcoumarin, and 7-diethylamino-4-methylcoumarin were measured at room temperature (298K) in several solvents and their first excited singlet-state dipole moments were determined by the solvatochromic shift method. The excited singlet-state dipole moments of the coumarins were compared with the ground-state values.Keywords
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