| Over the past decades, polyoxometalates （POMs） have attracted large interest because oftheir impressive compositional diversity and series of potential applications in catalysis,photochemistry, magnetism and electrochemistry. The evolution of POMs chemistry isdependent upon exploring suitable methods to synthesize novel POMs.In this paper, three new based on POMs inorganic-organic3D supermolecules have beenhydrothermal synthesis, and also structurally characterized by elemental analyses, TG-DTA,IR, and single crystal X-ray diffractions. The electrochemical, electrocatalytic property andphotocatalytic property of these compound have been investigated.Using hydrothermally synthesized method with warter as solvent has resulted in two newmulti-copper-containing polyoxotungstate [Cu（en）2·2H2O][Cu（en）2]4[Cu（en）2·H2O][Cu4（H2O）2(SiW9O34)2]·7H2O （1） and [Cu（en）2H2O]2[Cu（en）2]4[CuSiW11O39]27H2O （2）. Thediffraction analysis reveals that the compound1represents the organic-inorganic hybrid basedon the sandwish-type polyoxometalates linked by transition-metal coordination cations. Theframework of2is a two-dimensional net-texture structure with vacancies in it, and the2Dlayers are arranged in a parallelstaggering fashion to form a3D supermolecules framework. Itrepresents a3D organic–inorganic hybrid based on the bimolecular Keggin polyoxometalates.A new polyoxometalate-based inorganic-organic hybrid material, H5Ag（Bbi）1.5（Bbi）2[P2W18O62]（3）（Bbi=1,1-（1,4-butanediyl）-bis（imidazole））, has been hydrothermallysynthesized. In3, the adjacent [P2W18O62]6-（shorts for P2W18） anions are connected throughAg atoms by equator-positioned terminal oxygen atoms to generate a1D chain. The adjacentchains were further connected through Ag atoms and two-coordinated Bbi organic ligandsinto a （6,3）-layer, which are extended to3D supermolecule nets through H bonds. |
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