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Citation:
Gao Fang, Yang Yong-Yuan. Spectra Studies of Ketocoumarin Dye[J]. Acta Physico-Chimica Sinica,
;1999, 15(06): 550-554.
doi:
10.3866/PKU.WHXB19990613
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Ketocoumarin dye 3-acetyl-7-diethylaminecoumrin was synthesized and charaterized. The spectra and photophysics behavior were studied in different aprotic solvents. Results showed that the fluorescence quantum yield had a maximum and the ratio of non-radiative transition rate to radiative transition rate had a minimum with the increasing of the solvent polarity. Also, the fluorescence of the dye can be quenched by triethylamine and the change is in accordance with the Stern-Volmer formula. These phenomenon was discussed preliminarily.
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