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

被引：0
|
作者：
Yue Wang
Yupeng Liu
Taiwei Chu
机构：
[1] Peking University,Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering
来源：
Journal of Radioanalytical and Nuclear Chemistry | 2016年 / 308卷
关键词：
Uranyl; Tri-; -butyl phosphate; Ionic liquids; UV–Vis; Infrared;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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.
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页码：1071 / 1079
页数：8
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