Abstract: The photochemistry and photophysics of aqueous solutions of uranyl nitrate have been investigated by nanosecond laser photolysis with excitation at 266 and 355 nm and by timeresolved fluorescence spectroscopy. The quantum yield has been determined for formation under excitation with λ = 266 and 355 nm light (ϕ = 0.35). The quantum yield of uranyl luminescence under the same conditions is 1 × 10–2 and 1.2 × 10–3, respectively, while the quantum yield of luminescence in the solid state is unity, irrespective of the excitation wavelength. The decay of in the presence of ethanol is biexponential. The rate constants of this process at pH 3.4 are k1 = (2.7 ± 0.2) × 107 L mol–1 s–1 and k2 = (5.4 ± 0.2) × 106 L mol–1 s–1. This biexponential behavior is explained by the existence of different complex uranyl ion species in the solution. The addition of colloidal TiO2 to the solution exerts no effect on the quantum yield of formation or on the rate of the reaction between and ethanol. The results of this study have been compared with data available from the literature.

Cite: Filippov T.N. , Kolin'ko P.A. , Kozlov D.V. , Glebov E.M. , Grivin V.P. , Plyusnin V.F.
Photophysics and Photochemistry of Uranyl Ions in Aqueous Solutions: Refining of Quantitative Characteristics
Kinetics and Catalysis. 2016. V.57. N2. P.191-199. DOI: 10.1134/S0023158416020026 WOS Scopus РИНЦ AN OpenAlex

Original: Филиппов Т.Н. , Колинько П.А. , Козлов Д.В. , Глебов Е.М. , Гривин В.П. , Плюснин В.Ф.
Фотофизика и фотохимия ионов уранила в водных растворах: уточнение количественных характеристик
Кинетика и катализ. 2016. Т.57. №2. С.197-205. DOI: 10.7868/S0453881116020027 РИНЦ OpenAlex

Dates:

Submitted:	Feb 10, 2015
Published print:	Mar 1, 2016
Published online:	May 12, 2016

Identifiers:

Web of science:	WOS:000376094000008
Scopus:	2-s2.0-84979502875
Elibrary:	27095050
Chemical Abstracts:	2016:773139
OpenAlex:	W2382592569

Citing:

DB	Citing
Web of science	4
Scopus	4
Elibrary	5
OpenAlex	4

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