Photochemical reduction of the uranyl ion with dialkyl sulfides

Journal Article · Wed Oct 24 00:00:00 EDT 1984 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic00190a036· OSTI ID:5998294

Sandhu, S S; Kohli, K B; Brar, A S

The photochemical reduction of the uranyl ion by diethyl, di-n-propyl, and di-n-butyl sulfides has been investigated in acidified water-acetone medium by using radiations in the visible region (greater than or equal to 365 nm) from a medium-pressure mercury lamp. The photoreduction is independent of temperature. The quantum yield increases with an increase in dialkyl sulfide or hydrogen ion concentration. The plots of the reciprocal of the quantum yield vs. the reciprocal of initial dialkyl sulfide concentration are linear with intercepts on the ordinate axis. Stern-Volmer quenching constants have been calculated from luminescence measurements and indicated that physical and chemical quenching compete with each other. Electronic absorption spectra reveal that there is no ground-state interaction between the uranyl ion and the dialkyl sulfide. On the basis of product analysis, quantum yield of uranium(IV) formation, and Stern-Volmer quenching constants, a dynamic mechanism of oxygen atom transfer from the excited uranyl ion to dialkyl sulfide has been proposed. 33 references, 3 figures, 3 tables.

• Research Organization: Guru Nanak Dev University, Amritsar, India
• OSTI ID: 5998294
• Journal Information: Inorg. Chem.; (United States), Vol. 23:22
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
URANYL COMPLEXES
EXCITATION
REDUCTION
ABSORPTION SPECTROSCOPY
ACETONE
ALKANES
CATIONS
CHEMICAL REACTION KINETICS
CORRELATIONS
DATA ANALYSIS
EXPERIMENTAL DATA
MATHEMATICAL MODELS
MIXED SOLVENTS
ORGANIC SULFUR COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOIONIZATION
PHOTOLYSIS
QUANTITY RATIO
WATER
ACTINIDE COMPLEXES
CHARGED PARTICLES
CHEMICAL REACTIONS
COMPLEXES
DATA
DECOMPOSITION
DISPERSIONS
ENERGY-LEVEL TRANSITIONS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
IONIZATION
IONS
KETONES
KINETICS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
REACTION KINETICS
SOLVENTS
SPECTROSCOPY
URANIUM COMPLEXES
400500* - Photochemistry
400702 - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials