Issue 33, 2012

A dodecanuclear Zn cluster sandwiched by polyoxometalate ligands

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

Supplementary files

Article information

Article type
Paper
Submitted
02 Apr 2012
Accepted
17 Jul 2012
First published
23 Jul 2012

Dalton Trans., 2012,41, 9908-9913

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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