Published June 2016 | Version v1
Journal article Metadata-only

Spectroscopic studies on uranyl complexes with tri-n-butyl phosphate (TBP) in ionic liquids

Creators

  • 1. Peking University, Beijing (China). Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering

Description

The complexes formed from uranyl salts and tri-n-butyl phosphate (TBP) in ionic liquids (ILs) were studied by spectroscopic methods. [UO2(TBP)4]2+ is formed from UO2(ClO4)2· xH2O with excess of TBP in ILs. The coordination number of uranyl in [UO2(TBP)4]2+ is determined as 4 by ATR-FTIR study. In [Bmim][NTf2], though TBP cannot replace the NO3- coordinated to uranyl, TBP/[Bmim][NTf2] can extract 'nitrate-free' uranyl complex from diluted HNO3 medium and the extracted complex is converted into [UO2(TBP)4]2+ after drying. The formation of [UO2(TBP)4]2+ provides spectroscopic evidence for the cation-exchange mechanism of uranyl extraction by TBP/[Bmim][NTf2] from diluted HNO3 medium. (author)

Additional details

Publishing Information

Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Journal Volume
308
Journal Issue
3
Journal Page Range
p. 1071-1079
ISSN
0236-5731
CODEN
JRNCDM

INIS

Country of Publication
Hungary
Country of Input or Organization
Hungary
INIS RN
47070497
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AQUEOUS SOLUTIONS; FOURIER TRANSFORM SPECTROMETERS; ION EXCHANGE; MOLTEN SALTS; NITRIC ACID; SOLVENT EXTRACTION; TBP; URANYL COMPLEXES
Descriptors DEC
ACTINIDE COMPLEXES; BUTYL PHOSPHATES; COMPLEXES; DISPERSIONS; ESTERS; EXTRACTION; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; MEASURING INSTRUMENTS; MIXTURES; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHORIC ACID ESTERS; SALTS; SEPARATION PROCESSES; SOLUTIONS; SPECTROMETERS; URANIUM COMPLEXES

Optional Information

Notes
46 refs.