Hydrothermal syntheses, structures and properties of terephthalate-bridged polymeric complexes with zig-zag chain and channel structures

Abstract

Hydrothermal reactions of 1,4-dicyanobenzene, phen and M(OAc)₂ (M = Co, Zn) or MCl₂ (M = Cu, Mn, Cd) gave rise to the hydrolysis of 1,4-dicyanobenzene into terephthalic acid and the formation of five polymeric complexes [M(ta)(phen)(H₂O)]_n (M = Co, 1; Zn, 3), [Cu(ta)(phen)]_n (2), [Mn(ta)(phen)]_n (4), [Cd(ta)_1/2(phen)Cl]_n (5) (ta = terephthalate, phen = 1,10-phenanthroline). Crystal structure analyses revealed that complexes 1–3 have 1D zig-zag chain structures, and 4 and 5 possess 3D network structures with channels. Magnetic susceptibility measurements for 1, 2 and 4 were consistent with the occurrence of weak antiferromagnetic interaction through the ta bridge.