A cyclohexane-1,2-diyldinitrilotetraacetate tetrahydroxamate derivative for actinide complexation: synthesis and complexation studies

Citation
Ma. Santos et al., A cyclohexane-1,2-diyldinitrilotetraacetate tetrahydroxamate derivative for actinide complexation: synthesis and complexation studies, J CHEM S DA, (23), 2000, pp. 4398-4402
Citations number
36
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
ISSN journal
1472-7773 → ACNP
Issue
23
Year of publication
2000
Pages
4398 - 4402
Database
ISI
SICI code
1472-7773(2000):23<4398:ACTDF>2.0.ZU;2-0
Abstract
A new tetrahydroxamate ligand has been synthesized and its chelating proper ties studied, in aqueous solutions, with thorium(IV) and iron(III) as analo gues of the actinides plutonium(IV) and (to some extent) americium(III). Th e architecture of this ligand is based on that of the cyclohexane-1,2-diyld initrilotetraacetate complexone with hydroxamate instead of carboxylate gro ups. It has proven to form quite stable and water soluble complexes with th ese metal ions, up to pH 9. Besides the 1:1 (M:L) monomeric species formed under acidic conditions, the corresponding (2:2) dimeric complexes may also be admitted under physiological conditions. According to the magnetic prop erties and modelling calculations, the iron(III) dimer species should have some magnetic interaction between the metallic centres.