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Issue 5, 2019
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Zr4-Substituted polyoxometalate dimers decorated by D-tartaric acid/glycolic acid: syntheses, structures and optical/electrochemical properties

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Abstract

In this article, two new tetra-Zr(IV)-substituted sandwich-type Keggin polyoxometalates functionalized by chiral D-tartaric acid and glycolic acid, K2H10[Zr4(H2O)2(μ-OH)(μ3-O)2(D-tartH)(GeW10O37)2]·27H2O (1, D-tartH4 = D-tartaric acid) and K2H10[Zr4(H2O)23-O)2(gly)2(GeW10O37)2]·32H2O (2, glyH2 = glycolic acid), have been synthesized under hydrothermal conditions and characterized by FT-IR spectra, elemental analysis, single-crystal X-ray structure analysis, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), ultraviolet-visible absorption spectroscopy (UV-vis) and cyclic voltammetry (CV). The structure analysis reveals that both 1 and 2 contain a [Zr4(H2O)23-O)2(GeW10O37)2] cluster. UV-vis spectra indicate that both compounds are a wide-gap semiconductor. In addition, compound 1 is a chiral Zr(IV)-substituted sandwich-type Keggin cluster because the D-tartH ligand is chiral and the Flack divisor of 1 is 0.00, showing non-linear optical properties. The cyclic voltammograms indicate that compounds 1 and 2 have good electrocatalytic activity in the reduction of H2O2.

Graphical abstract: Zr4-Substituted polyoxometalate dimers decorated by d-tartaric acid/glycolic acid: syntheses, structures and optical/electrochemical properties

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Publication details

The article was received on 12 Nov 2018, accepted on 11 Dec 2018 and first published on 12 Dec 2018


Article type: Paper
DOI: 10.1039/C8CE01936C
Citation: CrystEngComm, 2019,21, 876-883

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    Zr4-Substituted polyoxometalate dimers decorated by D-tartaric acid/glycolic acid: syntheses, structures and optical/electrochemical properties

    Z. Ni, H. Li, X. Li and G. Yang, CrystEngComm, 2019, 21, 876
    DOI: 10.1039/C8CE01936C

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