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URANIUM (IV) POLYOXOTUNGSTOPHOSPHATE

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Mariana Rusu, Dan Rusu, Cristina Rosu, Adrian-Raul Tomsa, Gheorghe Marcu

Editorial: J. Radioanalyt. Nucl. Chem., 242(2), p.467-472, 1999.

Rezumat:

Two tris(oxouranium)-substitued Keggin and Dawson sandwich-type tungstophosphate heteropolyanions Na12[(UO)3(H2O)6(PW9O34)2]·21 H2O (1) and Na18[(UO)3(H2O)6(P2W15O56)2]·27 H2O (2) have been prepared by reaction of uranium sulphate with [PW9O34]9- and [P2W15O56]12-, respectively, in aqueous media at 4.7 pH. The products were characterized by elemental and thermal analyses, IR, UV-Vis spectroscopy and magnetical susceptibility. The results of these studies suggest that the compounds obtained from Keggin and Dawson trilacunary anions are 2:3 sandwich-type complexes and both exhibit a square antiprismatic stereochemistry for uranium (IV) with retention of polyoxometallates parents structure.

Cuvinte cheie: nuclear, radioanalytical