Change in the fluorescence of uranyl ions during the hydrolytic reduction of xenon difluoride
The hydrolytic reduction of xenon difluoride in solutions containing uranyl ions has been studied using iodometric titration and recording of the photoluminescence of UO/sub 2//sup 2 +/. It was found that uranyl ions increase the XeF/sub 2/ hydrolysis rate. A theoretical relationship was found between the uranyl ion photolumuinescence intensity and the F- concentration. It was assumed first that under slow ligand exchange conditions, when the radiative deactivation rate exceeds the ligand substitution rate, the complexes (UO/sub 2//sup 2 +/)aq, UO/sub 2/F/sup +/, and UO/sub 2/F/sub 2/ can be considered as independent emitters, and second that instead of the relative luminescence quantum yields the lifetime of the uranyl complexes in the electronically excited state can be used. This relationship is in good agreement with the experimental increase in the photoluminescence intensity of UO/sub 2//sup 2 +/ during the hydrolysis of XeF/sub 2/. There was not detectable spectroscopic evidence for the formation of the complex (UO/sub 2//sup 2 +/ x XeF/sub 2/). The responses of a fluorine-selective electrode were found to give incorrect results when XeF/sub 2/ was present in solution.
- OSTI ID:
- 5353805
- Journal Information:
- Sov. Radiochem. (Engl. Transl.); (United States), Vol. 29:2; Other Information: Translated from Radiokhimiya; 29: No. 2, 165-170(Mar-Apr 1987)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
URANYL COMPOUNDS
FLUORESCENCE
FLUORINATION
PHOTOLUMINESCENCE
XENON FLUORIDES
HYDROLYSIS
REDUCTION
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
COMPLEXOMETRY
DE-EXCITATION
IODOMETRY
LIGANDS
URANYL COMPLEXES
URANYL FLUORIDES
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
CHEMICAL REACTIONS
COMPLEXES
DECOMPOSITION
ENERGY-LEVEL TRANSITIONS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENATION
KINETICS
LUMINESCENCE
LYSIS
RARE GAS COMPOUNDS
REACTION KINETICS
SOLVOLYSIS
TITRATION
URANIUM COMPLEXES
URANIUM COMPOUNDS
XENON COMPOUNDS
400201* - Chemical & Physicochemical Properties