Issue 32, 2010
From the journal:

Dalton Transactions

Structures, magnetic and catalytic properties of three sandwich-type silicotungstates containing tetranuclear copper(ii)clusters†

Fan Yu,a   Yu-Xiang Long,a   Yan-Ping Ren,a   Xiang-Jian Kong,*a   La-Sheng Long,*a   Rong-Bin Huanga  and  Lan-Sun Zhenga  

* Corresponding authors

a State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
E-mail: xjkong@xmu.edu.cn, lslong@xmu.edu.cn
Fax: +86 592 218 3047

Abstract

Three sandwich-type silicotungstates, formulated as [Cu4(H2O)2(SiW9O34)2]·12NH4·22H2O (1), [Cu4(H2O)2(SiW9O34)2]·12NH4·11H2O (2) and {[Cu(NH3)4]2[Cu(H2O)4][Cu4(H2O)2(SiW9O34)2]} 2[Cu(NH3)4(H2O)]·2NH4·6H2O (3), were synthesized by microwave irradiation and hydrothermal reaction. Crystal structural analysis reveals that 1–3 possess the same dimeric polyoxoanions [Cu2SiW9O34(H2O)]212− featuring tetranuclear copper(II) clusters. Magnetic studies indicate that the Cu4 clusters exhibit ferromagnetic coupling interactions. Investigation on their catalytic activity for the oxidation of ethylbenzene suggests that catalytic activity of 1–3 is closely related to the acidity of complexes and the existence of unsaturated coordination sites in the complex.

Graphical abstract: Structures, magnetic and catalytic properties of three sandwich-type silicotungstates containing tetranuclear copper(ii) clusters

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Article information

DOI
https://doi.org/10.1039/C0DT00322K
Article type
Paper
Submitted
17 Apr 2010
Accepted
28 May 2010
First published
13 Jul 2010

Dalton Trans., 2010,39, 7588-7594

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Structures, magnetic and catalytic properties of three sandwich-type silicotungstates containing tetranuclear copper(II) clusters

F. Yu, Y. Long, Y. Ren, X. Kong, L. Long, R. Huang and L. Zheng, Dalton Trans., 2010, 39, 7588 DOI: 10.1039/C0DT00322K

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