Traven VF, Cheptsov DA, Mamirgova ZZ, Solovjova NP, Martynenko VM, Dolotov SM, Krayushkin MM, Ivanov IV. Photolysis of 3-(1-acyl-5-aryl-3-pyrazolinyl)coumarins-Effective Fluorescence Decay.
Photochem Photobiol 2020;
96:798-804. [PMID:
31900923 DOI:
10.1111/php.13211]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 11/27/2019] [Indexed: 11/28/2022]
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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