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Issue 17, 2019
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Two isopolytungstate compounds based on rare [W6O22]8− and [H2W12O42]10− fragments captured by premade copper(II) complexes

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Abstract

Two new isopolytungstate compounds, namely [Cu4(2,2′-bipy)4(H2O)2(W6O22)]·4H2O (1) and [Cu(en)2Na8(H2O)28(H2W12O42)]·4H2O (2) (2,2′-bipy = 2,2′-bipyridine, en = 1,2-ethylenediamine), were synthesized under hydrothermal conditions and in aqueous solution, respectively, and characterized by single-crystal X-ray diffraction, elemental analyses and FT-IR spectra. In compound 1, there is a rare hexatungstate anion [W6O22]8−, which is firstly captured by copper(II) complexes under hydrothermal condition by using sodium tungstate. The [W6O22]8− cluster is covered by two [Cu(2,2′-bipy)]2+ and two [Cu(H2O)(2,2′-bipy)]2+ clusters to form a tetra-supporting anion. In compound 2, the paradodecatungstate anion [H2W12O42]10− was captured by [Cu(en)2]2+ clusters in aqueous solution. The [H2W12O42]10− anions are linked by [Na3(H2O)10]3+ and [Na2(H2O)8]2+ clusters to construct an inorganic layer. The [Cu(en)2]2+ clusters connect these inorganic layers to build a 3D framework of 2. We studied the electrochemical and photocatalytic properties of these compounds.

Graphical abstract: Two isopolytungstate compounds based on rare [W6O22]8− and [H2W12O42]10− fragments captured by premade copper(ii) complexes

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Publication details

The article was received on 17 Dec 2018, accepted on 21 Mar 2019 and first published on 22 Mar 2019


Article type: Paper
DOI: 10.1039/C8NJ06367B
Citation: New J. Chem., 2019,43, 6765-6771

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    Two isopolytungstate compounds based on rare [W6O22]8− and [H2W12O42]10− fragments captured by premade copper(II) complexes

    J. Ying, Y. Chen and X. Wang, New J. Chem., 2019, 43, 6765
    DOI: 10.1039/C8NJ06367B

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