Polyoxoanions assembled by the condensation of vanadate, tungstate and selenite: solution studies and crystal structures of the mixed metal derivatives (NMe4)2Na2[WVI4VV2O19]·8H2O and (NMe4)4.83[(SeIV WVI4.57VV4.43O33)2(WVI(O)(H2O))(VVO)2.6]·10.57H2O
| Autor: | Pavel A. Abramov, Natalia V. Izarova, Maxim N. Sokolov, Nikolay B. Kompankov, Artem A. Zhdanov, Cristian Vicent, Tatiana Gutsul, Eugenia V. Peresypkina |
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| Rok vydání: | 2016 |
| Předmět: |
Electrospray
Aqueous solution 010405 organic chemistry Inorganic chemistry Condensation chemistry.chemical_element General Chemistry Crystal structure 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Crystallography Capillary electrophoresis chemistry Tungstate Materials Chemistry Vanadate Selenium |
| Zdroj: | New Journal of Chemistry. 40:937-944 |
| ISSN: | 1369-9261 1144-0546 |
| Popis: | The reaction of acidified aqueous solutions of Na2WO4, NaVO3 and SeO2 in a 16 : 4 : 3 molar ratio gives a complex mixture of polyoxometalates (POMs) with both WVI and VV addenda, formulated as [(SeIVWVIxVV9−xO33)2(WVIO(H2O))(VO)m]n− with x = 4, 5, 6; m = 2 or 3. In solution, the sandwich-type complexes [(SeIVWVIxVV9−xO33)2(WVIO(H2O))(VO)m]n− slowly lose Se and convert into [WVI4VV2O19]4− and further to [WVI5VVO19]3− with a Lindqvist-type structure. These transformations were monitored with 51V and 77Se NMR, electrospray mass-spectrometry and capillary electrophoresis. Crystals of (NMe4)2Na2[(W4V2)O19]·8H2O (1) and (NMe4)4.83[(SeW4.57V4.43O33)2(W(O)(H2O))(VO)2.6]·10.57H2O (2) were isolated and structurally characterized. |
| Databáze: | OpenAIRE |
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