Hydrothermal synthesis and structural characterization of an organically templated copper-vanadium phosphate: [{(bpy-dicarb)Cu}2{V3O3(OH)2(H2O)}(O3PCH2PO3)2]·2H2O (bpy-dicarb=2,2′-bipyridyl-4,4′-dicarboxylic acid)

The hydrothermal reaction of Cu2O, Na3VO4, H2O3PCH2PO3H2, 2,2′-bipyridine-4,4′-dicarboxylic acid, and H2O in the mole ratio 2.5:1.7:10:1.0:2700 at 200°C for 42 h yields [{(bpy-dicarb)Cu}2{V3O3(OH)2(H2O)}(O3PCH2PO3)2]·2H2O (1·2H2O). The structure of 1 is a two-dimensional sheet constructed from pentanuclear {V3Cu2O3(OH)2(H2O)}8+ units linked by (O3PCH2PO3)4− ligands into a network. Crystal data: C13H14N2O14P2V1.5Cu, triclinic, P1̄: a=7.8993(7) Å, b=11.0417(9) Å, c=11.857(1) Å, α=100.845(1)°, β=98.400(2)°, γ=105.290(2)°, V=958.7(1) Å3.