New Bitopic Ligands for the Group Actinide Separation by Solvent Extraction

The synthesis and evaluation of solvent extraction performance of N,N,N′,N′-tetraalkyl-6,6″-(2,2′:6′,2″-terpyridine)diamides and N,N′-diethyl-N,N′-diphenyl-6,6″-(2,2′:6′,2″-terpyridine)diamide are reported here. These new bitopic ligands were found to extract actinides in different oxidation states...

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Bibliographic Details
Published inSolvent extraction and ion exchange Vol. 29; no. 2; pp. 292 - 315
Main Authors Marie, Cécile, Miguirditchian, Manuel, Guillaneux, Denis, Bisson, Julia, Pipelier, Muriel, Dubreuil, Didier
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 18.03.2011
Subjects
Actinides
Amides
Basicity
bitopic ligand
group actinide extraction
Ligands
Nitric acid
Phenyls
Solvent extraction
Synthesis
terpyridine-diamide
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Summary:The synthesis and evaluation of solvent extraction performance of N,N,N′,N′-tetraalkyl-6,6″-(2,2′:6′,2″-terpyridine)diamides and N,N′-diethyl-N,N′-diphenyl-6,6″-(2,2′:6′,2″-terpyridine)diamide are reported here. These new bitopic ligands were found to extract actinides in different oxidation states (U(VI), Np(V and VI), Pu(IV), Am(III), and Cm(III)) from 3 M nitric acid. The presence of three soft nitrogen donors led to the selective extraction of actinides(III) over lanthanides(III) (Ce, Eu) and the presence of two amide functional groups grafted to the terpyridine unit allowed the extraction to occur from a highly acidic medium by minimizing the basicity of the ligand. Ligands bearing long alkyl chains (C4 and C8) or phenyl groups showed increased performances in a polar diluent like nitrobenzene.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0736-6299
1532-2262
DOI:10.1080/07366299.2011.556923