Photochemistry of sodium tetrathionate in aqueous solutions

Photochemistry of sodium tetrathionate in aqueous solutions

Détails bibliographiques
Parent link:Journal of Photochemistry and Photobiology A: Chemistry.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 471.— 2026.— Article number 116721, 10 p.
Autres auteurs: Semenova V. V. Veronika Valerievna, Glebov E. M. Evgeny Mikhaylovich, Grivin V. P. Vyacheslav, Fedunov R. G. Roman Gennadievich, Isaeva E. A. Evgeniya Andreevna, Egorov N. B. Nikolai Borisovich
Résumé:Title screen
Photochemistry of tetrathionate anion S4O62− in aqueous solutions was studied by means of stationary photolysis and laser flash photolysis. Quantum yield of S4O62− disappearance was found to change from 0.05 to 0.2 depending on the irradiation wavelength and the presence of dissolved oxygen. Deep photolysis leads to the sol formation. S2O3•- radical absorption was detected in the laser flash photolysis experiments. For quantitative description of the laser flash photolysis data, two channels of S4O62− photodissociation were proposed. The first channel yields in formation of two S2O3•- radical anions; in the second channel S2O3•- and SO3•- radical anions and a sulfur atom are formed. Surprisingly, the results of the laser flash photolysis experiments did not depend on the presence of dissolved oxygen. This fact was explained by the formation of the weakly-bound van der Waals complexes [S4O62−…O2]. At the experimental conditions all the dissolved oxygen molecules are bound and cannot react with the primary radical anions. In conditions of stationary photolysis, oxygen is photochemically released and can react with other intermediates, increasing the quantum yield of tetrathionate photodecomposition
Текстовый файл
AM_Agreement
Langue:anglais
Publié: 2026
Sujets:
электронный ресурс
труды учёных ТПУ
Photochemistry
Tetrathionate
Laser flash photolysis
Sulfur-containing radicals
Van der Waals complexes
Accès en ligne:https://doi.org/10.1016/j.jphotochem.2025.116721
Format: Électronique Chapitre de livre
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=685079

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