Solvent Effect on the Emission Spectra and the Fluorescence Quantum Yields of Psoralens
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概要
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The emission spectra and the fluorescence quantum yields of psoralens were measured in various solvents. We found that these compounds show a large Stokes shift, which can be explained in terms of intermolecular charge transfer interaction between a solute molecule and a solvent molecule in an excited singlet state. Psoralens have a larger fluorescence quantum yield in hydroxylic solvents than in non-hydroxylic solvents. These were in the following order : TMP≈5-MOP>PS≈8-MOP≈8-iso-AOP. We postulate that the fluorescence quantum yield is increased by the hydrogen bonding between a solute molecule and a solvent molecule in an excited singlet state. In addition, the fluorescence efficiency was enhanced by the presence of an electron-donating substituent group. The peak wavelengths of the phosphorescence spectra were little affected by the different solvents.
- 公益社団法人日本薬学会の論文
- 1981-03-25
著者
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松本 仁
School of Pharmacy, Tokushima University of Arts and Science
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松本 仁
Faculty Of Pharmaceutical Sciences Tokushima Bunri University
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磯部 明彦
Laboratory of Biology, Gumma Prefectural Women's College
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磯部 明彦
Laboratory Of Biology Gumma Prefectural Women's College
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松本 仁
School Of Pharmacy Tokushima University Of Arts And Science
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