A fluorescence study on the complexation of Sm(<scp>iii</scp>), Eu(<scp>iii</scp>) and Tb(<scp>iii</scp>) with tetraalkyldiglycolamides (TRDGA) in aqueous solution, in solid state, and in solvent extraction
作者:Fei Kou、Suliang Yang、Hongjuan Qian、Lihua Zhang、Christine M. Beavers、Simon J. Teat、Guoxin Tian
DOI:10.1039/c6dt02930b
日期:——
the complexation of fluorescent Sm(III), Eu(III), and Tb(III) with TRDGA ligands in aqueous solutions and a solvent extraction system. In aqueous solutions using N,N,N′,N′-tetramethyldiglycolamide (TMDGA, LI) as chelate, three successive complex species of Ln(III), including [LnLI]3+, [LnLI2]3+, and [LnLI3]3+, are identified for each Ln(III) (Ln = Sm, Eu, and Tb), and their stability constants are
四烷基二甘醇酰胺(TRDGA)配体具有潜在用途,可用于分离核工业中的in系元素和镧系元素离子(如果是水溶性的话,作为水溶液中的螯合物)或如果不溶于水的话,作为有机溶剂中的萃取剂。在这里,光谱滴定法被广泛应用于研究荧光Sm(III),Eu(III)和Tb(III)与TRDGA配体在水溶液和溶剂萃取系统中的络合。在使用N,N,N ′,N′-四甲基二甘醇酰胺(TMDGA,L I)作为螯合物的水溶液中,Ln(III)的三个连续复杂物种包括[LnL对每个Ln( III)分别确定I ] 3+,[LnL I 2 ] 3+和[LnL I 3 ] 3+(Ln = Sm,Eu和Tb),并通过荧光光谱确定其稳定性常数滴定法于25°C在1 M NaNO 3中进行。[LnL I 3 ] 3+中的配位模式通过固体化合物LnL I 3(ClO 4) 3的单晶结构表示(Ln = Sm,Eu,Tb和L I(TMDGA =