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Published on: June 10, 2021
Photolysis of 3-(1-acyl-5-aryl-3-pyrazolinyl)coumarins-Effective Fluorescence Decay
Valerii F Traven1, Dmitriy A Cheptsov1, Zarina Z Mamirgova1
1D. Mendeleev University of Chemical Technology of Russia, Moscow, Russian Federation.
Abstract:
Photophysical characteristics of new 3-(1-acyl-5-aryl-3-pyrazolinyl)coumarins have been measured. These coumarin derivatives are found to be effective fluorophores and show high values of quantum yields of fluorescence both in nonpolar and in polar solvents. The 3-(1-acyl-5-aryl-3-pyrazolinyl)coumarins turned to be photosensitive compounds and undergo photolysis under irradiation in the range of 310-465 nm. Photolysis is suggested to include retro-cyclization and retro-condensation steps. The process is accompanied by a sharp drop of fluorescence that can be of interest for the creation of new media in optical recording of information.
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