Crystal structure and spectral properties of complexes of tetravalent Th, U, Np and Pu nitrates with trimethyl phosphate and dimethyl phosphate
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I. A. Charushnikova
,
N. A. Budantseva
Abstract
Single crystals of [Th(TMP)6(NO3)2][Th(TMP)2(NO3)5]2 (1), [Th(TMP)4(NO3)3][Th(TMP)2(NO3)5] (2), [U(DMP)3(NO3)] (3), [Np(DMP)3(NO3)] (4), and [Pu(DMP)2(NO3)2(H2O)]·H2O (5) have been synthesized and their structures have been determined by X-ray analysis. IR and optical spectra of polycrystalline compounds 3 and 4 were measured at room temperature. The Th(IV) is crystallized as two complexes with TMP molecular ligands and NO3 anions in coordination environment. The Th atoms in cationic moieties of 1 and 2 are characterized by coordination number of 10 and in the anionic moieties by coordination number of 12. Compounds of U(IV), Np(IV) and Pu(IV) were obtained with two different anions (NO3 and DMP) in coordination environment of the central atom. U(IV) and Np(IV) compounds are isostructural and the main motif of structure is made of infinite chains of [An(DMP)3(NO3)]n, twisted around hexagonal axes. In the structure of Pu(IV) the main structural motif is made of infinite chains [Pu(DMP)2(NO3)2(H2O)]n, extending along the b axis. The coordination numbers of An(IV) are equal to 8 for U and Np, and 9 for Pu. The difference in the structure and composition of formed compounds Th and U, Np, Pu could be explained by hydrolysis of TMP at the synthesis conditions.
© 2013 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Masthead
- Masthead
- MicroSISAK: continuous liquid–liquid extractions of radionuclides at 0.2 mL/min
- Crystal structure and spectral properties of complexes of tetravalent Th, U, Np and Pu nitrates with trimethyl phosphate and dimethyl phosphate
- Heterogeneous reduction of 239PuO2 by aqueous Fe(II) in the presence of hematite
- New alkyl-pyridinedicarboxyamides as extractants for separationof trivalent minor actinides from fission products by extraction chromatography
- Liquid–liquid extraction of Np4+ and Pu4+ using several tetra-alkyl substituted diglycolamides
- Ion-imprinted polymeric nanoparticles as a novel sorbent to separate radioyttrium from Sr target
- Effect of a spacer moiety on radiometal labelled Neurotensin derivatives
- Investigaton of Kpong carbonatite as a potential source for rare earth elements (REEs) using instrumental neutron activation analysis (INAA)
- Precise age determination of a single plutonium particle using inductively coupled plasma mass spectrometer
