2,6-Bis(1-alkyl-1H-1,2,3-triazol-4-yl)-pyridines: selective lipophilic chelating ligands for minor actinides

Starting from the promising minor actinides (MA) affinity showed by the water-soluble ligands (PyTri-polyols) with the 2,6 - bis[1H - 1,2,3 - triazol - 4 - yl] - pyridine chelating unit, different attempts were made to functionalize the same N 3 -donor set with alkyl chains in the 1-position of tria...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2018-12, Vol.318 (3), p.2013-2022
Main Authors: Ossola, Annalisa, Macerata, Elena, Mossini, Eros, Giola, Marco, Gullo, Maria Chiara, Arduini, Arturo, Casnati, Alessandro, Mariani, Mario
Format: Article
Language:English
Subjects:
Actinides
Chelation
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Hadrons
Heavy Ions
Inorganic Chemistry
Ligands
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
Polyols
Pyridines
Selectivity
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Summary:Starting from the promising minor actinides (MA) affinity showed by the water-soluble ligands (PyTri-polyols) with the 2,6 - bis[1H - 1,2,3 - triazol - 4 - yl] - pyridine chelating unit, different attempts were made to functionalize the same N 3 -donor set with alkyl chains in the 1-position of triazole nuclei to obtain novel lipophilic extractants endowed with comparable MA selectivity. Solubility in organic diluents was found to be the main limitation to the development of efficient lipophilic ligands, thus resulting in less efficient extractants with respect to their hydrophilic analogues and sometimes impairing the selectivity evaluation. Interestingly, the ethyl hexyl derivative (PTEH) showed adequate extraction capability and a MA selectivity comparable to that of the hydrophilic PyTri family.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-018-6253-y