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- W3170750090 abstract "The strong basic nature and amenability of three nitrogen subunits of hexaalkyl phosphoramides (HalP) make them as potential extractants for the recovery of actinides by solvent extraction. The six alkyl groups present in the molecule improve the selectivity and physico-chemical properties (density, solubility, interfacial tension, etc.) of the extractants. In this regard, higher homologs of hexaalkyl phosphoramides such as hexaamyl phosphoramide (HAPA) and hexahexyl phosphoramide (HHPA) were evaluated for the extraction of actinides and fission products. HAPA and HHPA were synthesized in considerable yield by condensation reaction between phosphoryl chloride (POCl3) and the corresponding dialkyl amine. The synthesized compound was purified by column chromatography and characterized by spectroscopic techniques such as NMR (H1, C13, and P31) and IR. The extraction behavior of U(VI), Th(IV), and Pu(IV) was investigated as a function of aqueous phase nitric acid concentration for both the phosphoramides. In addition, physico-chemical properties such as density, solubility of phosphoramides in water and solubility of water in phosphoramides were measured. Results of phosphoramides were compared with the 1.1 M TBP/n-DD under identical conditions. The DFT calculations were performed to study the complexation behavior of phosphoramides with U and Pu. The computed complexation energy for metal-ligand complexes is consistent with the trend established by experimentally measured distribution ratios." @default.
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- W3170750090 date "2021-09-01" @default.
- W3170750090 modified "2023-09-24" @default.
- W3170750090 title "Exploring long-chain hexaalkyl phosphoramides for actinide extraction: A combined experimental and theoretical investigation" @default.
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- W3170750090 doi "https://doi.org/10.1016/j.ica.2021.120496" @default.
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