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

Pavel A. Abramov; Eugenia V. Peresypkina; Natalia V. Izarova; Cristian Vicent; Artem A. Zhdanov; Nikolay B. Kompankov; Tatiana Gutsul; Maxim N. Sokolov

doi:10.1039/C5NJ00858A

Polyoxoanions assembled by the condensation of vanadate, tungstate and selenite: solution studies and crystal structures of the mixed metal derivatives (NMe₄)₂Na₂[W^VI₄V^V₂O₁₉]·8H₂O and (NMe₄)_4.83[(Se^IV W^VI_4.57V^V_4.43O₃₃)₂(W^VI(O)(H₂O))(V^VO)_2.6]·10.57H₂O†

Pavel A. Abramov,*^ab Eugenia V. Peresypkina,^ab Natalia V. Izarova,^c Cristian Vicent,^d Artem A. Zhdanov,^a Nikolay B. Kompankov,^a Tatiana Gutsul^e and Maxim N. Sokolov^ab

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* Corresponding authors

^a Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia
E-mail: abramov@niic.nsc.ru

^b Novosibirsk State University, Novosibirsk, Russia

^c Peter Grünberg Institute – PGI 6, Forschungszentrum Jülich, D-52425 Jülich, Germany

^d Serveis Centrals d'Instrumentació Científica, Universitat Jaume I, Av. Sos Baynat s/n, 12071 Castelló, Spain

^e Gitsu Institute of Electronic Engineering and Nanotechnologies, Academy of Sciences of Moldova, Academiei str. 3/3, Chisinau, MD-2028 Republic of Moldova

Abstract

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 W^VI and V^V addenda, formulated as [(Se^IVW^VI_xV^V_9−xO₃₃)₂(W^VIO(H₂O))(VO)_m]ⁿ⁻ with x = 4, 5, 6; m = 2 or 3. In solution, the sandwich-type complexes [(Se^IVW^VI_xV^V_9−xO₃₃)₂(W^VIO(H₂O))(VO)_m]ⁿ⁻ slowly lose Se and convert into [W^VI₄V^V₂O₁₉]⁴⁻ and further to [W^VI₅V^VO₁₉]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[(SeW_4.57V_4.43O₃₃)₂(W(O)(H₂O))(VO)_2.6]·10.57H₂O (2) were isolated and structurally characterized.

This article is part of the themed collection: Emergent Polyoxometalates and Soft-oxometalates

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Article information

DOI: https://doi.org/10.1039/C5NJ00858A
Article type: Paper
Submitted: 07 Apr 2015
Accepted: 09 Jun 2015
First published: 10 Jun 2015

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New J. Chem., 2016,40, 937-944

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Polyoxoanions assembled by the condensation of vanadate, tungstate and selenite: solution studies and crystal structures of the mixed metal derivatives (NMe₄)₂Na₂[W^VI₄V^V₂O₁₉]·8H₂O and (NMe₄)_4.83[(Se^IV W^VI_4.57V^V_4.43O₃₃)₂(W^VI(O)(H₂O))(V^VO)_2.6]·10.57H₂O

P. A. Abramov, E. V. Peresypkina, N. V. Izarova, C. Vicent, A. A. Zhdanov, N. B. Kompankov, T. Gutsul and M. N. Sokolov, New J. Chem., 2016, 40, 937 DOI: 10.1039/C5NJ00858A

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