Titel
Regioselective synthesis and characterization of monovanadium-substituted β-octamolybdate [VMo7O26]5−
Autor*in
Abstract
The monovanadium-substituted polyoxometalate anion [VMo7O26]5−, exhibiting a β-octamolybdate archetype structure, was selectively prepared as pentapotassium [hexaikosaoxido(heptamolybdenumvanadium)]ate hexahydrate, K5[VMo7O26]·6H2O (VMo7), by oxidation of a reduced vanadomolybdate solution with hydrogen peroxide in a fast one-pot approach. X-ray structure analysis revealed that the V atom occupies a single position in the cluster that differs from the other positions by the presence of one doubly-bonded O atom instead of two terminal oxide ligands in all other positions. The composition and structure of VMo7 was also confirmed by elemental analyses and IR spectroscopy. The selectivity of the synthesis was inspected by a 51V NMR investigation which showed that this species bound about 95% of VV in the crystallization solution. Upon dissolution of VMo7 in aqueous solution, the [VMo7O26]5− anion is substantially decomposed, mostly into [VMo5O19]3−, α-[VMo7O26]4− and [V2Mo4O19]4−, depending on the pH.
Stichwort
polyoxometalatePOMoctamolybdatevanadium51V NMR spectroscopycrystal structure
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:1090182
Erschienen in
Titel
Acta Crystallographica Section C Structural Chemistry
Band
75
Ausgabe
7
ISSN
2053-2296
Erscheinungsdatum
2019
Seitenanfang
872
Seitenende
876
Publication
International Union of Crystallography (IUCr)
Erscheinungsdatum
2019
Zugänglichkeit
Rechte
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