Assembly of two-fold interpenetrated silver supramolecular coordination polymer using Keggin phosphotungstate template

An unusual supramolecular coordination polymer [{Ag(bpy)}2(Hbpy)][PW12O40] (1) has been synthesized under hydrothermal conditions and structurally characterized by elemental analysis, IR, TG, PXRD, XPS, UV–vis, and single-crystal X-ray diffraction. In compound 1, Keggin-type [PW12O40]3 − clusters as templates induce the supramolecular [{Ag(bpy)}2(Hbpy)]3 + layer to 3D hexagonal metal–organic framework (MOF), which represents two-fold interpenetrating MOF with 1-D helical channels constructed from alternate left- and right-handed chains. In addition, compound 1 exhibits good electrocatalytic activity on the reduction of nitrite and fluorescent properties in the solid state at room temperature.