Journal Article

FZJ-2023-00522

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Synthesis and evaluation of new modified diglycolamides with different stereochemistry for extraction of tri- and tetravalent metal ions

Diaz Gomez, L. J.FZJ* ; Wilden, A. (Corresponding author)FZJ* ; Schneider, D.FZJ* ; Paparigas, Z.FZJ* ; Modolo, G.FZJ* ; Gullo, M. C. ; Huskens, J. ; Verboom, W.

2023
RSC London

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Please use a persistent id in citations: http://hdl.handle.net/2128/34082  doi:10.1039/D2NJ05663A

Abstract: Americium separation from high level nuclear waste can provide certain benefits such as reducing the long-term heat generation or the possibility of re-use as fuel in innovative reactors. The separation is carried out through solvent extraction. Among commonly used ligands, diglycolamide (DGA) derivatives have shown high distribution ratios for trivalent lanthanides (Ln(III)) and actinides (An(III)). Recently, different diastereomers of DGAs with substitutions in the backbone have shown an inverse selectivity for Am over Cm, in comparison with commonly used DGAs. Hence, we synthesised, characterized, and tested novel <i>syn</i>- and <i>anti</i>-diastereomers of tetra-<i>n</i>-octyl and tetra-<i>n</i>-decyl DGAs with two propyl and ethyl-methyl substituents at the backbone methylene carbon atoms. The distribution ratios for An(III) and Ln(III) were found to be generally lower than for the unsubstituted parent molecules due to steric hindrance. On the other hand, ²³⁹Pu was much better extracted. All tested ligands showed the inverse selectivity for Am with an Am/Cm separation factor (SF_Am/Cm) around 1.5. Finally, slope analysis confirmed a 1:3 metal:ligand ratio for the DGA complexes.

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Contributing Institute(s):

1. Nukleare Entsorgung (IEK-6)

Research Program(s):

1. 1412 - Predisposal (POF4-141) (POF4-141)
2. SEPAM - Verbundprojekt: Untersuchungen zur SEParation von Americium aus hochradioaktiven Abfalllösungen (SEPAM), Teilprojekt A (02E11921A) (02E11921A)

Appears in the scientific report 2023

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Database coverage:
; ; ; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; Index Chemicus ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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