Polyoxoanion-enveloped Ag/ptz inorganic-organic hybrid system: From a single to a double template

By changing the polyoxoanions in the same metal-organic system (Ag/ptz), two novel inorganic-organic hybrids: [Ag-10(ptz)(5)(HP2W18O62)(H2O)(4)]center dot 2H(2)O (1), [Ag-7(ptz)(5)(H2SiW12O40)(H2O)] (2) (ptz = 5-(4-pyridyl)-tetrazolate), are synthesized under hydrothermal conditions, and characterized by IR spectra, elemental analyses and single crystal X-ray diffraction. Compound 1 and 2 show 3D POM-templated framework structures. In compound 1, a 2D layer is constructed by shield-like'' metal-organic circles templated by P2W18 polyoxoanions, which is extended to a 3D structure by covalent bonds in an interdigital mode. In compound 2, a 3D network is constructed by 2D layers and a double bridge-pillar'', the Keggin polyoxoanion templates are enveloped in pairs in nanocages. The influences of polyoxoanion templates on the frameworks are discussed. The electrochemical behavior and luminescent properties for compound 1 and 2 are investigated.