Inorganic-organic hybrid polymers via hydrothermal syntheses (see abstract)

Hydrothermal reactions of MoO3, CuO, and pyrazine-2-carboxylic acid (Hpzca) resulted in two polymeric complexes, {([Cu5(pzca)6(H2O)4] [Mo8O26]})n (1; pzca = pyrazine-2-carboxylate) and [Mo3Cu2O10(pz)]n (2; pz = pyrazine). The former crystallized in the monoclinic space group P21/c with a = 10.805(3) Å, b = 13.061(5) Å, c = 13.337(10) Å, β = 90.20(4)°, V= 2729(2) Å3, and Z = 2. The later crystallized in the orthorhombic space group Pnma with a = 12.385(2) Å, b = 7.6044(9) Å, c = 12.7880(14) Å, V = 1204.4(2) Å3, and Z = 4. X-Ray diffraction analysis revealed that 1 possesses a two-dimensional wave-like structure, formed from a zigzag one-dimensional chain, and 2 is a three-dimensional network structure formed from a one-dimensional chain and a pz bridging ligand. The temperature-dependent magnetic behavior of 1 was studied.