TY  - JOUR
AU  - Diaz Gomez, Laura Johana
AU  - Wilden, Andreas
AU  - Schneider, Dimitri
AU  - Paparigas, Zaina
AU  - Modolo, Giuseppe
AU  - Gullo, Maria Chiara
AU  - Huskens, Jurriaan
AU  - Verboom, Willem
TI  - Synthesis and evaluation of new modified diglycolamides with different stereochemistry for extraction of tri- and tetravalent metal ions
JO  - New journal of chemistry
VL  - 47
IS  - 10
SN  - 0398-9836
CY  - London
PB  - RSC
M1  - FZJ-2023-00522
SP  - 4619-4627
PY  - 2023
AB  - 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, <sup>239</sup>Pu was much better extracted. All tested ligands showed the inverse selectivity for Am with an Am/Cm separation factor (SF<sub>Am/Cm</sub>) around 1.5. Finally, slope analysis confirmed a 1:3 metal:ligand ratio for the DGA complexes.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000913958300001
DO  - DOI:10.1039/D2NJ05663A
UR  - https://juser.fz-juelich.de/record/917292
ER  -