Hydrothermal Synthesis and Structure of a Novel Coordination Polymer Co3（tma）(pda)2（H2O）3]n·nH2O

A novel coordination polymer [Co3(tma)(pda)2(H2O)3]n?nH2O was synthesized by hydrothermal reaction of 3-(3-pyridyl)acrylate acid (pda) and trimesic acid (tma) with CoCl2?6H2O. The structure was characterized by elemental analysis, IR spectroscopy and X-ray single-crystal dif- fraction analysis. It crystallizes in triclinic, space group P 1 with a = 9.569(4), b = 12.562(6), c = 12.666(6) ?, α = 97.321(7), β = 110.295(7), γ = 106.110(7)°, V = 1328.9(10) ?3, Dc = 1.877 g/cm3, Mr = 751.24, Z = 2, μ = 1.930 mm?1, F(000) = 758, the final R = 0.0392 and wR = 0.0837. The diffraction result shows that Co atoms are linked through pda and tma ligands to form an infinite three-dimensional network.