Synthesis and evaluation of ligands with mixed amide and phosphonate, phosphinoxide, and phosphonothioate sites for An(iii)/Ln(iii) extraction
作者:Mudassir Iqbal、Richard G. Struijk、Jurriaan Huskens、Michal Sypula、Andreas Wilden、Giuseppe Modolo、Willem Verboom
DOI:10.1039/c2nj40330g
日期:——
Various organophosphorus ligands with a combination of different donor sites were synthesized and evaluated by solvent extraction studies for the complexation of Am(III)/Eu(III). Among the ligands with a glycolamide backbone, those with mixed amide and PO donor sites and a central oxygen or nitrogen atom showed a reasonable extraction of Am(III) and Eu(III). Ligands with a central oxygen atom exhibited selectivity towards Eu(III), and those with a central nitrogen atom towards Am(III). Ligands with PS donor sites and a glycolamide backbone did not show any reasonable extraction. Amongst the ligands with a malonamide backbone, high extraction efficiency was observed for the ligand with electron-rich substituents on phosphorus, however, with almost no discrimination between Am(III) and Eu(III). The extraction efficiency of different ligands towards Eu(III) was confirmed by microcalorimetry.
作者:A. Yu. Ziganshina、E. H. Kazakova、S. V. Fedorenko、A. R. Mustafina、A. I. Konovalov
DOI:10.1023/a:1013958003756
日期:——
O,O-Dibutyl-N-benzylamino- and O,O-dibutyl-N-phenylaminomethylphosphonate derivatives of tetramethylcalix[4]resorcinolarenes were prepared and characterized. Their effectiveness in the extraction of lanthanum(III) ions from water to chloroform in the presence of picrate ions is demonstrated. This extraction is accompanied by the formation of a complex of the composition La(Pic)(3)(L)(2).