Cite this article as:

Гринёв В. С., Коннова С. А., Игнатов В. В. Fragmentation of Quercetin and Naringenin and Photoinduced Processes under Laser Desorption/Ionization Conditions. Izvestiya of Saratov University. Chemistry. Biology. Ecology, 2016, vol. 16, iss. 4, pp. 433-438. DOI: https://doi.org/10.18500/1816-9775-2016-16-4-433-438

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
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Biology
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Russian

Fragmentation of Quercetin and Naringenin and Photoinduced Processes under Laser Desorption/Ionization Conditions

Authors: 
Grinev Vyacheslav Sergeevich, Institute of Biochemistry and Physiology of Plants and Microorganisms of the Russian Academy of Sciences, 410049, Russia, Saratov, Entuziastov Avenue, 13, grinev@ibppm.ru
Konnova Svetlana Anatolyevna, Saratov State University , 83, Astrakhanskaya str., Saratov, 410012, Russia , konnovasa@yandex.ru
Ignatov V. V., Institute of Biochemistry and Physiology of Plants and Microorganisms of the Russian Academy of Sciences, 410049, Russia, Saratov, Entuziastov Avenue, 13, secret@ibppm.sgu.ru
Abstract

We found that under laser desorption and ionization conditions, quercetin, belonging to the flavonol family, undergoes a decay, which occurs through a photoinduced reaction followed by dimerization of the forming biradical and by the subsequent fragmentation of the dimer. Naringenin, belonging to the flavonone family, also undergoes similar fragmentation, but owing to the lack of conjugation in the C ring, the forming biradical particle is not capable of further dimerization in the same way as observed for quercetin because of its low stability. In the spectra, signals of the naringenin C–C dimer and of its fragment ion were found, and their possible structures were proposed.

Key words: 
flavonoids, mass spectrometry, laser desorption and ionization, photochemical process
DOI: 
https://doi.org/10.18500/1816-9775-2016-16-4-433-438
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