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Synthesis of Tetramethylammonium Polyoxovanadates

Published online by Cambridge University Press:  18 March 2011

Nathalie Steunou ,
Laure Bouhedja ,
Jocelyne Maquet  and
Jacques Livage
Nathalie Steunou
Affiliation:
Chimie de la Matière Condensèe, UMR CNRS 7574Universitè Pierre et Marie Curie, Paris, France
Laure Bouhedja
Affiliation:
Chimie de la Matière Condensèe, UMR CNRS 7574Universitè Pierre et Marie Curie, Paris, France
Jocelyne Maquet
Affiliation:
Chimie de la Matière Condensèe, UMR CNRS 7574Universitè Pierre et Marie Curie, Paris, France
Jacques Livage
Affiliation:
Chimie de la Matière Condensèe, UMR CNRS 7574Universitè Pierre et Marie Curie, Paris, France
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Abstract

Tetramethylammonium (TMA) polyoxovanadates have been precipitated from aqueous solutions aroundpH 7. Decavanadate clusters (TMA)4[H2V10O28]•4H2O are formed at room temperature whereas a layered (TMA)[V4O10] mixed valence compound is formed under hydrothermal conditions. 51V NMR spectra recorded on the solution at different temperatures show that upon heating decavanadate clusters are progressively transformed into cyclic [V4O12]4− metavanadates. This suggests that the mixed valence polyoxovanadates are formed via the ring opening polymerization of metavanadate precursors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 658: Symposium GG – Solid-State Chemistry of Inorganic Materials III , 2000 , GG8.3
Copyright
Copyright © Materials Research Society 2001

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References

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