Three New 3D Coordination Polymers Constructed from Semirigid Tri-carboxylate V-shaped Ligand: Synthesis, Characterization and Magnetic Properties

Hydrothermal reactions of 2-(2',4'-dicarboxylphenoxy) benzoic acid (H3L) with 1,4-di(pyridin-4-yl)benzene (dpb) and 1,4-bis(2-methylimidazol-3-ium-1-yl)benzene (bimib) in the presence of Mn(OAc)(2)center dot 4H2O and Zn(NO3)(2)center dot 6H(2)O yielded three new coordination polymers, [Mn-1.5(L)(dpb)center dot H2O]center dot H2O (1), [Zn-3(L)(2)(bimib)](n) (2) and [Zn-3(L)(2)(bmimb)] n (3), complex 1 has a three dimensional structure formed by the combination of mono and binuclear chains, complexes 2 and 3 have identical structures with one only different in the length of the auxiliary ligands, both complexes have 3D structure. All the complexes were characterized by IR, XRD, PXRD, and thermal gravemetric analysis (TGA), furthermore the magnetic bevior of complex 1 was studied; which showed antiferromagnetic behavior.