Synthesis and characterization of fluoride-incorporated polyoxovanadates

Journal of Inorganic Biochemistry
Yuji KikukawaYoshihito Hayashi

Abstract

The speciation studies of oxovanadates are essential to clarify their biological activities. We surveyed the distribution of oxovanadate species in the presence of halide anions with various acid concentrations in an aqueous mixed-solvent system. The presence of chloride, bromide, and iodide anions has no effects on the appearance of polyoxovanadate species observed in (51)V NMR. Those are the precedent formation of metavanadate species and decavanadates. The presence of fluoride anion during the addition of acids exhibits strong intervention in the polyoxovanadate equilibria and we found the subsequent formation of two polyoxovanadate species by (51)V NMR observation. From the estimated experimental condition, we isolated fluoride-incorporated polyoxovanadates {Et4N}4[V7O19F] and {Et4N}4[HV11O29F2], successfully. Polyanion [V7O19F](4-) is the fluoride-incorporated all V(V) state polyoxovanadate which has two different coordination environments of tetrahedral and square pyramidal vanadium units within the one anionic structural integrity. The structural gap between tetrahedral-unit-based metavanadate and octahedral-unit-based decavanadate structures may be linked by this hybrid complex.

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Citations

Apr 23, 2017·Chemistry, an Asian Journal·Sho KuwajimaYoshihito Hayashi
Apr 27, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Yoshitaka InoueYoshihito Hayashi
Jan 11, 2018·Chemistry : a European Journal·Maria NicolaouHaralampos N Miras
Mar 15, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Haijiao LuSebastian D Pike
Apr 18, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Yuji KikukawaYoshihito Hayashi

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