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Issue 33, 2012
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A dodecanuclear Zn cluster sandwiched by polyoxometalate ligands

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Abstract

A dodecazinc silicotungstate K20Na2[Zn6(OH)7(H2O)(Si2W18O66)]2·34H2O (1) has been synthesized and characterized by X-ray crystallography, elemental analysis, infrared, UV-vis spectroscopy, cyclic voltammetry, acid–base titration, and DFT calculations. The twelve zinc atoms between the two [Si2W18O66]16− frameworks make this complex more stable hydrolytically than the heteropolytungstate ligands, [Si2W18O66]16−, themselves. The structurally unique central Zn12 core is formed by the fusion of two [Zn6(OH)7(H2O)]5+ units through two edge-sharing Zn6 atoms. DFT B3LYP calculations give HOMO–LUMO and (HOMO − 1)–LUMO energy gaps of ∼3.65 and 3.91 eV, respectively, as compared to the band gap in ZnO of 3.35 eV.

Graphical abstract: A dodecanuclear Zn cluster sandwiched by polyoxometalate ligands

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Publication details

The article was received on 02 Apr 2012, accepted on 17 Jul 2012, published on 23 Jul 2012 and first published online on 23 Jul 2012


Article type: Paper
DOI: 10.1039/C2DT30733B
Citation: Dalton Trans., 2012,41, 9908-9913
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    A dodecanuclear Zn cluster sandwiched by polyoxometalate ligands

    G. Zhu, Y. V. Geletii, C. Zhao, D. G. Musaev, J. Song and C. L. Hill, Dalton Trans., 2012, 41, 9908
    DOI: 10.1039/C2DT30733B

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