Activation of the Aromatic Core of 3,3′-(Pyridine-2,6-diylbis(1H-1,2,3-triazole-4,1-diyl))bis(propan-1-ol)-Effects on Extraction Performance, Stability Constants, and Basicity

被引：28

作者：

Wessling, Patrik ^{[1
,2
]}

Trumm, Michael ^{[1
]}

Macerata, Elena ^{[3
]}

Ossola, Annalisa ^{[3
]}

Mossini, Eros ^{[3
]}

Gullo, Maria Chiara ^{[4
]}

Arduini, Arturo ^{[4
]}

Casnati, Alessandro ^{[4
]}

Mariani, Mario ^{[3
]}

Adam, Christian ^{[1
]}

Geist, Andreas ^{[1
]}

Panak, Petra J. ^{[1
,2
]}

机构：

[1] Karlsruhe Inst Technol, Inst Nucl Waste Disposal, POB 3640, D-76021 Karlsruhe, Germany

[2] Heidelberg Univ, Inst Phys Chem, Neuenheimer Feld 253, D-69120 Heidelberg, Germany

[3] Politecn Milan, Dept Energy, Nucl Engn Div, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy

[4] Univ Parma, Dipartimento Sci Chim Vita & Sostenibil Ambiental, Area Sci 17-A, I-43124 Parma, Italy

来源：

INORGANIC CHEMISTRY | 2019年 / 58卷 / 21期

基金：

欧洲研究理事会;

关键词：

SOLVENT-EXTRACTION; DONOR LIGANDS; BTP LIGANDS; BASIS-SETS; SEPARATION; CHEMISTRY; ACTINIDES(III); COMPLEXATION; AM(III); LANTHANIDES(III);

D O I：

10.1021/acs.inorgchem.9b02325

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The "CHON" compatible water-soluble ligand 3,3'-(pyridine-2,6-diylbis(1H-1,2,3-triazole-4,1-diyl))bis-(propan-1-ol) (PTD) has shown promise for selectively stripping actinide ions from an organic phase containing both actinide and lanthanide ions, by preferential complexation of the former. Aiming at improving its complexation properties, PTD-OMe was synthesized, bearing a methoxy group on the central pyridine ring, thus increasing its basicity and hence complexation strength. Unfortunately, solvent extraction experiments in the range of 0.1-1 mol/L nitric acid proved PTD-OMe to be less efficient than PTD. This behavior is explained by its greater pK(a) value (pK(a) = 2.54) compared to PTD (pK(a) = 2.1). This counteracts its improved complexation properties for Cm(III) (log beta(3)(PTD-OMe) = 10.8 +/- 0.4 versus log beta(3)(PTD) = 9.9 +/- 0.5).

引用

页码：14642 / 14651

页数：10

共 5 条

[1] 3,3′-(Pyridine-2,6-diyl)bis(4-allyl-4,5-dihydro-1H-1,2,4-triazole-5-thione)
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[5] Diaqua[3,5-bis(4-pyridyl)-1H-1,2,4-triazole-κN3](pyridine-2,6-dicarboxylato-κ3O2,N,O6)nickel(II)
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