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.
合成了各种具有不同供体位点组合的有机磷配体,并通过溶剂萃取研究评估了它们对铽(III)/铕(III)的络合能力。在具有甘油酰胺主链的配体中,采用混合酰胺和磷氧供体位点以及中央氧或氮原子的配体表现出了对铕(III)和铽(III)的合理萃取。中央氧原子的配体对铕(III)表现出选择性,而中央氮原子的配体则对铽(III)表现出选择性。具有磷硫供体位点和甘油酰胺主链的配体未表现出任何合理的萃取效果。在具有美克酰胺主链的配体中,带有富电子取代基的配体表现出较高的萃取效率,但对铽(III)和铕(III)几乎没有选择性。不同配体对铕(III)的萃取效率通过微量热法得到了证实。