Identification of Photolysis Products of Aqueous Sodium Thiosulfate Solutions

• Published in: High energy chemistry Vol. 57; no. Suppl 3; pp. S397 - S401
• Main Authors: Egorov, N. B., Isaeva, E. A., Dmitrieva, A. A., Kulikova, A. V., Voroshilov, F. A., Zherin, I. I.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-12-2023; Springer Nature B.V
• Subjects: Aqueous solutions; Chemistry; Chemistry and Materials Science; Excimers; Hydrogen sulfide; Infrared spectroscopy; Irradiation; Mass spectrometry; Photolysis; Physical Chemistry; Sodium thiosulfate; Spectrophotometry; Sulfur; Ultraviolet radiation; sodium thiosulfate; Raffo sol; photolysis products; hydrogen sulfide; stationary photolysis; excimer lamps; polythionate ions
• ISSN: 0018-1439; 1608-3148
• DOI: 10.1134/S0018143923090047

The results of identification of photolysis products of air-saturated aqueous solutions of Na
2
S
2
O
3
irradiated with a KrCl excimer lamp are presented. Using spectrophotometry, HPLC, IR spectroscopy, and mass spectrometry, it has been shown that intermediate photolysis products are colloidal sulfur and tetrathionate and pentathionate ions, which photodegrade to form sulfur, sulfate ions, and hydrogen sulfide during further UV irradiation involving atmospheric oxygen and solvent molecules. Reactions for the formation of detected photolysis products have been proposed.