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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 shu

Spectra Studies of Ketocoumarin Dye

Gao Fang ,
Yang Yong-Yuan

1.
Institute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101

Received Date: 2 July 1998
Available Online: 15 June 1999

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.
- Aprotic solvent effect,
- Ketocoumarin dye,
- Spectrum,
- Fluorescence quantum yield
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