%0 Journal Article
%A Weßling, Patrik
%A Maag, Melina
%A Baruth, Giana
%A Sittel, Thomas
%A Sauerwein, Fynn S.
%A Wilden, Andreas
%A Modolo, Giuseppe
%A Geist, Andreas
%A Panak, Petra J.
%T Complexation and Extraction Studies of Trivalent Actinides and Lanthanides with Water-Soluble and CHON-Compatible Ligands for the Selective Extraction of Americium
%J Inorganic chemistry
%V 61
%N 44
%@ 0020-1669
%C Washington, DC
%I American Chemical Society
%M FZJ-2022-03759
%P 17719–17729
%D 2022
%X Novel hydrophilic ligands to selectively separate Am(III) are synthesized: 3,3′-([2,2′-bipyridine]-6,6′-diylbis(1H-1,2,3-triazole-4,1-diyl))bis(propan-1-ol) (PrOH-BPTD) and 3,3′-([2,2′-bipyridine]-6,6′-diylbis(1H-1,2,3-triazole-4,1-diyl))bis(ethan-1-ol) (EtOH-BPTD). The complexation of An(III) and Ln(III) with PrOH- and EtOH-BPTD is studied by time-resolved laser fluorescence spectroscopy. [ML2]3+ is found for both Cm(III) and Eu(III), while [ML]3+ is only formed with Cm(III). Stability constants show a preferential coordination of Cm(III) over Eu(III) with PrOH-BPTD being the stronger ligand. The distribution of Am(III), Cm(III), and Ln(III) between an organic phase containing the extracting agent N,N,N′,N′-tetra-n-octyl-3-oxapentanediamide (TODGA) and aqueous phases containing PrOH-BPTD is studied as a function of time and temperature as well as the TODGA, BPTD, and HNO3 concentrations. A system composed of 0.2 mol/L TODGA and 0.04 mol/L PrOH-BPTD in 0.33–0.39 mol/L HNO3 allows for selective Am(III) back-extraction into the aqueous phase while keeping Cm(III) and Ln(III) in the organic phase, marking PrOH-BPTD as an excellent complexant for an optimized AmSel process (Am(III) selective extraction).
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 36274232
%U <Go to ISI:>//WOS:000877103700001
%R 10.1021/acs.inorgchem.2c02871
%U https://juser.fz-juelich.de/record/910340