Unusual Fluorescent Properties of Novel Fluorophores, 6-Aryl-3,4-diphenyl-α-pyrone Derivatives

Novel fluorophores, 6-aryl-3,4-diphenyl-α-pyrones, were synthesized and their spectroscopic properties investigated in the form of evaporated films on plain glass slides, as well as in the solid and solution states. An electron-donating aryl group on the 6-position of the pyrones causes a red-shift...

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Bibliographic Details
Published in:Bulletin of the Chemical Society of Japan 2001-09, Vol.74 (9), p.1567-1575
Main Authors: Hirano, Keisuke, Minakata, Satoshi, Komatsu, Mitsuo
Format: Article
Language:English
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Summary:Novel fluorophores, 6-aryl-3,4-diphenyl-α-pyrones, were synthesized and their spectroscopic properties investigated in the form of evaporated films on plain glass slides, as well as in the solid and solution states. An electron-donating aryl group on the 6-position of the pyrones causes a red-shift in the absorption and fluorescent maxima. In the solid states, they show intense blue-to-orange fluorescence, but not in solution. This unusual fluorescent property is caused by fixing the 6-aryl group of the pyrones, and is the result of molecular packing. These interactions induce a pathway for radiative decay, which is associated with intense fluorescence emission only in the solid state.
ISSN:0009-2673
1348-0634
DOI:10.1246/bcsj.74.1567