Poly[bis­{μ₂-4-[3,5-bis­(pyridin-4-yl)phen­yl]pyridine}­nona-μ₂-oxido-tetra­oxidocopper(II)tetra­molybdenum(VI)]

The title compound, [CuMo₄O₁₃(C₂₁H₁₅N₃)₂]_n, was synthesized by the reaction of ammonium molybdate, copper acetate and 4-[3,5-bis­(pyridin-4-yl)phen­yl]pyridine (DPPP) in an aqueous medium under hydro­thermal conditions. The two unique molybdenum centers and the copper center adopt MoO₄ tetra­hedral, MoO₅N octa­hedral and CuO₄N₂ octa­hedral geometries, respectively. These polyhedra are connected to each other through corner-sharing to form a two-dimensional Cu–Mo–O layer, which is further linked by the DPPP ligands to form the three-dimensional inorganic–organic hybrid framework.