Format:
10
ISSN:
1520-510X
Content:
The “CHON” compatible water-soluble ligand 3,3′-(pyridine-2,6-diylbis(1H-1,2,3-triazole-4,1-diyl))bis(propan-1-ol) (PTD) has shown promise for selectively stripping actinide ions from an organic phase containing both actinide and lanthanide ions, by preferential complexation of the former. Aiming at improving its complexation properties, PTD-OMe was synthesized, bearing a methoxy group on the central pyridine ring, thus increasing its basicity and hence complexation strength. Unfortunately, solvent extraction experiments in the range of 0.1-1 mol/L nitric acid proved PTD-OMe to be less efficient than PTD. This behavior is explained by its greater pKa value (pKa = 2.54) compared to PTD (pKa = 2.1). This counteracts its improved complexation properties for Cm(III) (log β3(PTD-OMe) = 10.8 ± 0.4 versus log β3(PTD) = 9.9 ± 0.5).
Note:
Gesehen am 04.12.2019
In:
Inorganic chemistry, Washington, DC : American Chemical Society, 1962, 58(2019), 21, Seite 14642-14651, 1520-510X
In:
volume:58
In:
year:2019
In:
number:21
In:
pages:14642-14651
In:
extent:10
Language:
English
DOI:
10.1021/acs.inorgchem.9b02325
Bookmarklink