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1,10‐Phenanthroline and Non‐Symmetrical 1,3,5‐Triazine Dipicolinamide‐Based Ligands For Group Actinide Extraction
Author(s) -
Bisson Julia,
Dehaudt Jérémy,
Charbonnel MarieChristine,
Guillaneux Denis,
Miguirditchian Manuel,
Marie Cécile,
Boubals Nathalie,
Dutech Guy,
Pipelier Muriel,
Blot Virginie,
Dubreuil Didier
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201402266
Subject(s) - phenanthroline , actinide , extraction (chemistry) , chemistry , triazine , reagent , ligand (biochemistry) , combinatorial chemistry , nuclear chemistry , inorganic chemistry , polymer chemistry , organic chemistry , biochemistry , receptor
The synthesis and evaluation of new extractants for spent nuclear fuel reprocessing are described. New bitopic ligands constituted of phenanthroline and 1,3,5‐triazine cores functionalized by picolinamide groups were designed. Synthetic routes were investigated and optimized to obtain twelve new polyaza‐heterocyclic ligands. In particular, an efficient and versatile methodology was developed to access non‐symmetric 2‐substituted‐4,6‐di(6‐picolin‐2‐yl)‐1,3,5‐triazines from the 1,3,5‐triazapentadiene precursor in the presence of anhydride reagents. Extraction studies showed the ability of both ligand series to extract and separate actinides selectively at different oxidation states (U VI , Np V,VI , Am III , Cm III , and Pu IV ) from an acidic solution (3 M HNO 3 ). Phenanthroline‐based ligands show the most promising efficiency for use in the group actinide extraction (GANEX) process due to a higher number of donor nitrogen atoms and a suitable pre‐organization of the dipicolinamide‐1,10‐phenanthroline architecture.