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Issue 33, 2015
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Tuning the structures based on polyoxometalates from 1-D to 2-D by using different secondary organic ligands

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Abstract

Six new organic–inorganic hybrid compounds based on [XM12O40]4− (X = heteroatom, M = metal atom), namely [Cu(pic)2][H2XM12O40]·2Hapy·2apy (X = Si, M = W for 1, X = Ge, M = W for 2 and X = Si, M = Mo for 3), [Cu(2,2′-bpy)2][Cu(2,2′-bpy)(H2O)][Cu(pic)2]0.5[XM12O40nH2O (X = Si, M = Mo, n = 0.5 for 4, X = Ge, M = W, n = 1 for 5) and [Cu(phen)(H2O)]2[Cu(pic)2][GeW12O40]·2.5H2O (6) (pic = deprotonated picolinic acid, apy = 2-aminopyridine, 2,2′-bpy = 2,2′-bipyridine, phen = phenanthroline), have been synthesized and characterized by IR, UV-Vis, XRD, cyclic voltammetric measurements and single crystal X-ray diffraction analysis. Single crystal X-ray analysis reveals that compounds 1–3 are isomorphous and isostructural, in which each is based on [H2XM12O40]2− and [Cu(pic)2]. Compounds 4 and 5 are also isomorphous and isostructural, of which the structures are more interesting than those of compounds 1–3. Both structures are constructed from [XM12O40]4− and metal mixed–organic–ligand complexes. Compound 6 is also constructed from Keggin ions and metal mixed–organic–ligand complexes, which are, however, thoroughly different from those of compounds 4 and 5. The photodegradation properties of compounds 1–6 have been analyzed. Compounds 1–3 also exhibit rapid absorption properties for RhB (Rhodamine B). Detailed analysis of the photodegradation properties of compounds 1–5 reveals that the molybdate POM has stronger degradation ability for RhB than the tungstate one.

Graphical abstract: Tuning the structures based on polyoxometalates from 1-D to 2-D by using different secondary organic ligands

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Publication details

The article was received on 01 Jun 2015, accepted on 16 Jul 2015 and first published on 17 Jul 2015


Article type: Paper
DOI: 10.1039/C5DT02060C
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Dalton Trans., 2015,44, 14830-14841

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    Tuning the structures based on polyoxometalates from 1-D to 2-D by using different secondary organic ligands

    Y. Hu, Xiao-Zhang, D. Zhao, H. Guo, L. Fu, L. Guo, X. Cui, Q. Huo and J. Xu, Dalton Trans., 2015, 44, 14830
    DOI: 10.1039/C5DT02060C

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