Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (06): 550-554.doi: 10.3866/PKU.WHXB19990613

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Spectra Studies of Ketocoumarin Dye

Gao Fang, Yang Yong-Yuan   

  1. Institute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101
  • Received:1998-07-02 Revised:1998-09-14 Published:1999-06-15
  • Contact: Gao Fang


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.

Key words: Aprotic solvent effect, Ketocoumarin dye, Spectrum, Fluorescence quantum yield