Abstract
The intrusion of pathogens into ballast water, not only destroys marine ecological environment, but also threatens human health. The study synthesized a new cobalt complex with a ligand of 3-pyridine-4-benzoic acid by hydrothermal synthesis method. Its structure was characterized by elemental analyzer and single crystal diffractometer, and its infrared spectroscopy, thermal stability and inhibitory activity were analyzed. The results show that the complex belongs to the monoclinic system and space group C2 / c, with unit cell parameters a = 8.2484 (9) Å, b = 10.3371 (11) Å, c = 12.2031 (14) Å, α = 89.588 (2) °, β = 87.0870 (10) °, cell volume = 982.03 (19) Å3, Z = 2, F (000) = 508, Dcalc = 1.709mg/cm3, R1 = 0.0391 and wR2 = 0.0807. The asymmetric unit of the complex consists of the two Co ions, four ligand molecules and two coordinated water molecules, each center Co ions forms a hexacoordinated distorted octahedral structure. The MIC of complex for Escherichia coli, Salmonella and Vibrio parahaemolyticus in ballast water are respectively 78μg/mL, 39μg/mL and 78μg/mL, and its antimicrobial effects is better than ligands, which can be used as a novel bacteriostatic agent of ballast water.
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