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Citation: Wang Peng-Fei, Wu Shi-Kang. A Study on the Luminescence Behavior of 4'-Dimethylaminoflavone Derivatives[J]. Acta Physico-Chimica Sinica, ;1994, 10(08): 744-749. doi: 10.3866/PKU.WHXB19940816 shu

A Study on the Luminescence Behavior of 4'-Dimethylaminoflavone Derivatives

1.
Institute of Photographic Chemistry,Academia Sinica,Beijing 100101

Received Date: 17 April 1993
Available Online: 15 August 1994

The luminescence behaviors of 4'-dimethyldrinoflavone derivarive with different structures have been studied in different conditions. Results show that the luminescence behavior depends dramatically on the solvent polarity. The reason is attributed to the different conformations in different solvents. The planar conformation is proved to be favorable to the fluorescence emission. In addition, results of viscosity-dependent luminescence property show that for compound 3 with the rigidized planar structure the luminescence behavior do not depend on the medium viscosity. But, for compound 1 and 2 the fluorescence quantum yields increase with increasing medium viscosity evidently, indicating that the rotation relaxation process of benzene ring in the molecule is very important for the nonradiative decay process of excited molecules of compounds.
- Flavone,
- Intramolecular charge transfer,
- Iuminescence behavior,
- Fluorescence quantum yield,
- Relaxation process of excited state,
- Fluorescence life time
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