Polyoxometalate-based 3D porous framework with inorganic molecular nanocage units

A new polyoxometalate-based 3D porous framework with inorganic molecular nanocage unit, ( $$\hbox {H}_{2}\hbox {dap})[\hbox {K}(\hbox {H}_{2}\hbox {O})_{2}$$ ( $$\hbox {V}_{10}\hbox {O}_{28})_{0.5}$$ ] (1) (dap $$=$$ 1,2-diaminopropane), has been synthesized and characterized by routine methods. In 1, the decavanadate clusters, as twelve-dentate connectors, link eight potassium ions to form a 3D porous framework with inorganic molecular cage units. There are two dap ligand molecules occupying in each inorganic molecular cage. Furthermore, the electrochemical properties of 1 were studied, which indicate that 1 has a good electrocatalytic activity towards reduction of iodate ( $$\hbox {IO}_{3}^{-})$$ ascribed to the V-center. A new polyoxometalate-based 3D porous inorganic nanocage framework has been synthesized. The electrochemical properties indicate that it has a good electrocatalytic activity towards the reduction of iodate.