Synthesis,crystal structure,and characterization of a new high-dimensional phosphomolybdate architecture built from silver-complex fragments and hexa-connected P2Mo5 clusters

A new 3-D organic–inorganic hybrid phosphomolybdate, Ag(bipy)]₄(H₂P₂Mo₅O₂₃) · 3H₂O (1) (bipy = 4,4′-bipyridine) has been hydrothermally synthesized and characterized by elemental analyses, IR, TG, and fluorescent properties. Compound 1 crystallizes in the monoclinic space group C2/c with a = 23.830(5), b = 21.030(4), c = 24.501(5) Å, β = 110.38(3)°, V = 11510(4) ų, Z = 8, and R ₁ (wR ₂) = 0.0507 (0.1210). It contains unique 3-D metal organic frameworks based on silver-complex fragments and hexa-connected P₂Mo₅ clusters via covalent bonds and represents the highest connection numbers of P₂Mo₅ clusters to date.