Photochemistry of sodium thiosulfate in aqueous solutions revisited; Journal of Photochemistry and Photobiology A: Chemistry; Vol. 427
| Parent link: | Journal of Photochemistry and Photobiology A: Chemistry Vol. 427.— 2022.— [113818, 12 p.] |
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| Συγγραφή απο Οργανισμό/Αρχή: | |
| Άλλοι συγγραφείς: | , , , , , |
| Περίληψη: | Title screen A mechanistic study of sodium thiosulfate (S2O32−) photolysis in aqueous solutions at neutral pH was performed using stationary and nanosecond laser flash photolysis. S2O32− photochemistry was found to be oxygen-dependent. Quantum yield of S2O32− disappearance was measured; it was found to depend on irradiation wavelength and presence of dissolved oxygen in solutions. The photochemical properties were explained by means of model containing two primary reactions, namely photoionization and photodissociation of thiosulfate to S•− and SO3•− radical anions. In the presence of dissolved oxygen we were forced to propose the formation of a weak complex formed by thiosulfate and dioxygen, [S2O32−…O2]. The photoexcitation of this complex directly yields S2O3•− and O2•−. Kinetic behavior of intermediate absorption in laser flash photolysis experiments was found to be rather complicated because of the presence of an aquated electron and several sulfur-containing radical anions. In oxygen-free solutions these radicals are S2O3•−, •S4O63−, S•−, and SO3•−. In the presence of dissolved oxygen SO2•−, SO5•− and S2O5•− radicals as well as superoxide anion radical should be added to explain the kinetics of intermediate absorption. The existence of the S2O5•− radical anion was proposed for the first time. Several rate constants of these radicals' reactions were measured. Режим доступа: по договору с организацией-держателем ресурса |
| Γλώσσα: | Αγγλικά |
| Έκδοση: |
2022
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| Θέματα: | |
| Διαθέσιμο Online: | https://doi.org/10.1016/j.jphotochem.2022.113818 |
| Μορφή: | Ηλεκτρονική πηγή Κεφάλαιο βιβλίου |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=668189 |
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| 200 | 1 | |a Photochemistry of sodium thiosulfate in aqueous solutions revisited |f E. M. Glebov, I. P. Pozdnyakov, V. P. Grivin [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 65 tit.] | ||
| 330 | |a A mechanistic study of sodium thiosulfate (S2O32−) photolysis in aqueous solutions at neutral pH was performed using stationary and nanosecond laser flash photolysis. S2O32− photochemistry was found to be oxygen-dependent. Quantum yield of S2O32− disappearance was measured; it was found to depend on irradiation wavelength and presence of dissolved oxygen in solutions. The photochemical properties were explained by means of model containing two primary reactions, namely photoionization and photodissociation of thiosulfate to S•− and SO3•− radical anions. In the presence of dissolved oxygen we were forced to propose the formation of a weak complex formed by thiosulfate and dioxygen, [S2O32−…O2]. The photoexcitation of this complex directly yields S2O3•− and O2•−. Kinetic behavior of intermediate absorption in laser flash photolysis experiments was found to be rather complicated because of the presence of an aquated electron and several sulfur-containing radical anions. In oxygen-free solutions these radicals are S2O3•−, •S4O63−, S•−, and SO3•−. In the presence of dissolved oxygen SO2•−, SO5•− and S2O5•− radicals as well as superoxide anion radical should be added to explain the kinetics of intermediate absorption. The existence of the S2O5•− radical anion was proposed for the first time. Several rate constants of these radicals' reactions were measured. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Journal of Photochemistry and Photobiology A: Chemistry | ||
| 463 | |t Vol. 427 |v [113818, 12 p.] |d 2022 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a aquated electron | |
| 610 | 1 | |a laser flash photolysis | |
| 610 | 1 | |a photochemistry | |
| 610 | 1 | |a raffo sols | |
| 610 | 1 | |a sulfur-containing radicals | |
| 610 | 1 | |a thiosulfate | |
| 610 | 1 | |a фотолиз | |
| 610 | 1 | |a фотохимия | |
| 610 | 1 | |a серосодержащие соединения | |
| 610 | 1 | |a тиосульфаты | |
| 701 | 1 | |a Glebov |b E. M. |g Evgeni | |
| 701 | 1 | |a Pozdnyakov |b I. P. |g Ivan | |
| 701 | 1 | |a Grivin |b V. P. |g Vjacheslav | |
| 701 | 1 | |a Plyusnin |b V. F. |g Victor | |
| 701 | 1 | |a Isaeva |b E. A. |c chemical technologist |c engineer of Tomsk Polytechnic University |f 1989- |g Evgeniya Andreevna |3 (RuTPU)RU\TPU\pers\47271 | |
| 701 | 1 | |a Egorov |b N. B. |c chemical engineer |c Associate Professor of Tomsk Polytechnic University, Candidate of chemical science |f 1974- |g Nikolai Borisovich |3 (RuTPU)RU\TPU\pers\31207 |9 15403 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Инженерная школа ядерных технологий |b Отделение ядерно-топливного цикла |3 (RuTPU)RU\TPU\col\23554 |
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| 856 | 4 | |u https://doi.org/10.1016/j.jphotochem.2022.113818 | |
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