Copper and zinc complexes with 2,3-pyridinedicarboxylic acid or 2,3-pyrazinedicarboxylic acid: Polymer structures and magnetic properties

Six title copper(II)/zinc(II) coordination polymers have been synthesized, using the metal salt with different oxidation states (Cu(NO3)2/CuBr2/CuI/Zn(OAc)2), dicarboxylate ligand (2,3-pyridinedicarboxylic acid (pydc) or 2,3-pyrazinedicarboxylic acid (pzdc)) and the auxiliary ligand (2,2′-bpy, phen or 4,4′-bpy). The dicarboxylate ligand (pydc or pzdc) bridges two neighboring metal atoms to form a 1D chain in complexes 1, 2, 3, 4 and 6 and 2D network in 5, respectively. There are an extended 3D metal-organic framework in 1–5 and an extended 2D network in 6, respectively. The magnetic properties and photoluminescent property of some title complexes were investigated. The factors affecting structural characterizations in the products have been discussed.