TY  - JOUR
AU  - Iqbal, M.
AU  - Huskens, J.
AU  - Sypula, M.
AU  - Modolo, G.
AU  - Verboom, W.
TI  - Synthesis and evaluation of novel water-soluble ligands for the complexation of metals during the partitioning of actinides
JO  - New journal of chemistry
VL  - 35
SN  - 1144-0546
CY  - London
PB  - RSC
M1  - PreJuSER-17077
SP  - 2591 - 2600
PY  - 2011
N1  - The authors gratefully acknowledge the financial support from the EU ACSEPT (Actinide reCycling by SEParation and Transmutation) project (FP7 collaborative project 211267) and HEC (higher education commission) Pakistan.
AB  - Different types of water-soluble ligands were synthesized and their capability was evaluated by solvent extraction studies to complex trivalent actinides and suppress their extraction by a strong lipophilic ligand, such as TODGA. The back extraction efficiency of hydrophilic diglycolamide (DGA) derivatives with a varying number of ethylene glycol groups, or containing sodium acetate moieties on the amidic nitrogen shows a decrease in back-extraction efficiency with increasing number of ethylene glycol units on the amidic nitrogen at various pH values of the aqueous phase. Among the P-S donating ligands only the ligand with a malonamide backbone exhibits a high reverse extraction efficiency, although, with no selectivity for americium. Within the water-soluble tripodal ligands, i.e. the amide derivatives of nitrilotriacid with N,N-dimethyl and N, N-bis(hydroxyethyl) moieties, the first one shows a pronounced selectivity for Am(III) over Eu(III), with a maximum separation factor of 11.1, while the latter one more efficiently complexes the radionuclides in the aqueous phase with a maximum separation factor of 5. Isothermal microcalorimetry experiments of the complexation of Eu(III) by a selected series of ligands confirm the observed trend in the back extraction properties.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000296204900027
DO  - DOI:10.1039/c1nj20523d
UR  - https://juser.fz-juelich.de/record/17077
ER  -