Selective Complexation and Separation of Uranium(VI) from Thorium(IV) with New Tetradentate N,O-Hybrid Diamide Ligands: Synthesis, Extraction, Spectroscopy, and Crystallographic Studies
作者:Ying Wang、Yuxiang Yang、Yijie Wu、Jin Li、Bowen Hu、Yimin Cai、Lihua Yuan、Wen Feng
DOI:10.1021/acs.inorgchem.2c04384
日期:2023.3.27
tetradentate N,O-hybrid ligands, N,N′-diethyl-N,N′-di-p-tolyl-2,2′-bipyridine-6,6′-dicarboxamide (Et-Tol-BPDA) and N,N′-diethyl-N,N′-di-p-tolyl-2,2′-bipyrimidine-4,4′-dicarboxamide (Et-Tol-BPymDA), comprising a bipyridine or bipyrimidine core and amide moieties were designed and synthesized for selectively complexing and separating U(VI) from Th(IV). The high U(VI)/Th(IV) extraction selectivity was achieved
钍-铀燃料循环中尚未解决的挑战是铀与钍的有效分离。在此,两个新的四齿 N,O-杂化配体,N , N' -diethyl- N , N' -di - p -tolyl-2,2'-bipyridine-6,6'-dicarboxamide (Et-Tol-BPDA)和N,N'-二乙基-N,N'-二-对甲苯基-2,2'-联嘧啶-4,4'-二甲酰胺(Et-Tol-BPymDA),包含联吡啶或联嘧啶核心和酰胺部分设计和合成用于从 Th(IV) 中选择性络合和分离 U(VI)。Et-Tol-BPDA ( SF U/Th= 33 在 3 M HNO 3 ) 和 Et-Tol-BPymDA ( SF U/Th = 73 在 3 M HNO 3) 在硝酸溶液中。U(VI) 或 Th(IV) 与这两个配体的萃取过程主要通过溶剂化机制进行,如斜率分析所证明的那样。提取 U(VI) 和 Th(IV) 的热力学研究