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Title: Synthesis, structure, electrochemistry and magnetism of cobalt-, nickel- and zinc-containing [M4(OH)3(H2O)2(α-SiW10O36.5)2]13- (M = Co2+, Ni2+, and Zn2+)
Authors: Haider, Ali
Bassil, Bassem 
Lin, Zhengguo
Ma, Xiang
Haferl, Peter J
Bindra, Jasleen K
Kinyon, Jared
Zhang, Guangjin
Keita, Bineta
Dalal, Naresh S
Kortz, Ulrich
Affiliations: Department of Chemistry 
Issue Date: 2021
Part of: Dalton Transactions
Volume: 50
Issue: 11
Start page: 3923
End page: 3930
Interaction of the trilacunary 9-tungstosilicate [A-α-SiW9O34]10- with cobalt(ii), nickel(ii) and zinc(ii) ions in pH 9 aqueous medium at room temperature led to the formation of the respective M4-containing heteropolytungstates [M4(OH)3(H2O)2(α-SiW10O36.5)2]13- (M = Co2+ (1), Ni2+ (2), and Zn2+ (3)). Polyanions 1-3 were characterized in the solid state by single-crystal XRD, FT-IR spectroscopy, and thermogravimetric and elemental analyses. Electrochemical studies showed that the Co2+ ions in 1 can be oxidized to Co3+ and the CVs of the WVI centers of the polyanions feature well-defined and chemically reversible reduction waves. Magnetic measurements on 1 and 2 showed paramagnetism with complex ferromagnetic and antiferromagnetic interactions. A model was presented for extracting the exchange constants for the magnetic exchange interaction.
ISSN: 14779226
DOI: 10.1039/d0dt03392h
Open URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Chemistry

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