Photolysis of 3‐(1‐acyl‐5‐aryl‐3‐pyrazolinyl)coumarins—Effective Fluorescence Decay. (10th March 2020)

• Record Type: Journal Article
• Authors: Traven, Valerii F.; Cheptsov, Dmitriy A.; Mamirgova, Zarina Z.; Solovjova, Natalya P.; Martynenko, Vyacheslav M.; Dolotov, Sergei M.; Krayushkin, Michail M.; Ivanov, Ivan V.
• Is Part Of: Photochemistry and photobiology. Volume 96:Number 4(2020)
• Page Start: 798
• Page End: 804
• Publication Date: 2020-03-10
• Subjects: Photochemistry -- Periodicals; Light -- Physiological effect -- Periodicals; 541.35
• DOI: 10.1111/php.13211
• Languages: English
• ISSNs: 0031-8655

Abstract

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. Abstract : The photophysical characteristics of the new 3‐(1‐acyl‐5‐aryl‐3‐pyrazolinyl)coumarins were measured. These compounds are effective fluorophores and possess high quantum yields of fluorescence. 3‐(1‐Acyl‐5‐aryl‐3‐pyrazolinyl)coumarins undergo easy photolysis with a sharp decay of fluorescence. These results may be of interest for the creation of new carriers for optical recording of information.