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Yttrium containing head-on complexes of silico- and germanotungstate: Synthesis, structure and solution properties


Hussain, F; Degonda, A; Sandriesser, S; Fox, T; Mal, S S; Kortz, U; Patzke, Greta R (2010). Yttrium containing head-on complexes of silico- and germanotungstate: Synthesis, structure and solution properties. Inorganica Chimica Acta, 363(15):4324-4328.

Abstract

Two dimeric head-on complexes of yttrium containing silico- and germanotungstate were isolated from the one-pot reaction of Y(NO3)(3)center dot 6H(2)O with the lacunary Na-10MW9O34]center dot 16H(2)O (M = Si and Ge) building blocks in an acetate buffer at pH 4.5. Both polyanions were structurally characterized using various solid-state analytics, such as single-crystal X-ray diffraction, single-crystal X-ray analysis shows that both polyanions crystallize in the monoclinic crystal system (S.G. P2(1)/c). FT-IR spectroscopy, or thermogravimetric analysis. The stability of the polyanion in aqueous solution was studied by multinuclear NMR spectroscopy (W-183, Y-89, Si-29, C-13, and H-1). As expected, the W-183 NMR spectra display six peaks in the intensity ratio of 4:4:2:4:4:4 which indicates that both polyanions exist as dimeric entities in aqueous solution.(C) 2010 Elsevier B.V. All rights reserved.

Abstract

Two dimeric head-on complexes of yttrium containing silico- and germanotungstate were isolated from the one-pot reaction of Y(NO3)(3)center dot 6H(2)O with the lacunary Na-10MW9O34]center dot 16H(2)O (M = Si and Ge) building blocks in an acetate buffer at pH 4.5. Both polyanions were structurally characterized using various solid-state analytics, such as single-crystal X-ray diffraction, single-crystal X-ray analysis shows that both polyanions crystallize in the monoclinic crystal system (S.G. P2(1)/c). FT-IR spectroscopy, or thermogravimetric analysis. The stability of the polyanion in aqueous solution was studied by multinuclear NMR spectroscopy (W-183, Y-89, Si-29, C-13, and H-1). As expected, the W-183 NMR spectra display six peaks in the intensity ratio of 4:4:2:4:4:4 which indicates that both polyanions exist as dimeric entities in aqueous solution.(C) 2010 Elsevier B.V. All rights reserved.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:2010
Deposited On:23 Feb 2011 16:41
Last Modified:29 May 2017 21:55
Publisher:Elsevier
ISSN:0020-1693
Publisher DOI:https://doi.org/10.1016/j.ica.2010.07.053
Other Identification Number:ISI:000284626700028

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