Synthesis and Characterization of Coordination Polymers Based on 5-Azidoisophthalic Acid

Four coordination polymers, Co(aip) (py)(3) (1), Co(aip) (4,4'-bipy) (2), Mn (aip) (4, 4'-bipy) (3) and Mn(aip) (dptz) (4) [Py: pyridine; 4,4'-bipy: 4,4'-dipyridyl; dptz: 3,6-bis (4-pyridyl)1,2,4,5-tetrazine] were synthesized by the reaction of 5-azidoisophthalic acid(H(2)aip) and auxiliary ligands with transition metal. The structures of the complexes were characterized by single crystal X-ray diffraction, powder X-ray diffraction, elemental analyses, infrared spectroscopy and thermal-gravimetric analysis. The structural analyses of compound 1 show that the complex belongs to the monoclinic system, and the space group is C2/c with a 1D chain structure. Compounds 2 and 3 belong to the monoclinic system, and the space group is C2/m with 2D network structures. For compound 4, the space group is P (1) over bar with a 2D network. The magnetic properties were also characterized. The results reveal that anti-ferromagnetic interaction exists in compounds 1-4.