TRLFS study on the complexation of Cm(III) and Eu(III) with SO3-Ph-BTBP

被引：29
作者：
Wagner, Christoph [1 ,2 ]
Muellich, Udo [2 ]
Geist, Andreas [2 ]
Panak, Petra J. [1 ,2 ]
机构：
[1] Heidelberg Univ, Dept Phys Chem, D-69120 Heidelberg, Germany
[2] Karlsruhe Inst Technol, Inst Nucl Waste Disposal INE, D-76021 Karlsruhe, Germany
来源：
DALTON TRANSACTIONS | 2015年 / 44卷 / 39期
基金：
芬兰科学院;
关键词：
HYDROPHILIC 2,6-BIS(1,2,4-TRIAZIN-3-YL)-PYRIDINE; ACTINIDE(III)/LANTHANIDE(III) SEPARATION; FISSION-PRODUCTS; 1-CYCLE SANEX; ACTINIDES; FLUORESCENCE; EXTRACTION; LIGANDS; TODGA; LANTHANIDES(III);
D O I：
10.1039/c5dt02923f
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The complexation of Cm(III) and Eu(III) with a water soluble BTBP (sodium 3,3', 3 '', 3'''-([2,2'-bipyridine]-6,6'-diylbis(1,2,4-triazine-3,5,6-triyl)) tetrabenzenesulfonate, SO3-Ph-BTBP) is studied using time resolved laser fluorescence spectroscopy. For the complexation of Cm(III) the influence of the medium (10(-3) M HClO4 -> 0.5 M HNO3) is investigated in detail revealing important impacts of the applied medium (pH, ionic strength, anions) on the speciation and conditional stability constants. SO3-Ph-BTBP forms 1 : 2 complexes with Cm(III) and Eu(III). The conditional stability constants of [Cm(SO3-Ph-BTBP)(2)](5-) and [Eu(SO3-Ph-BTBP) 2](5-) in 0.5 M HNO3 are determined to be log beta(02) = 7.3 +/- 0.3 and log beta(02) = 5.4 +/- 0.5, respectively. The difference of 1.9 orders of magnitude is in line with hydrophobic BT(B)P type ligands and shows that the selectivity is not affected by tuning the hydrophilicity using SO3-Ph-side chains.
引用
收藏
页码：17143 / 17151
页数：9
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