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Antibacterial applications of benzothiazole terpolymer transition metal complexes: synthesis, characterization and effects on bacterial and fungal strains

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Document pages: 16 pages

Abstract: The terpolymer of 2-amino-6-nitrobenzothiazole ethylenediamine formaldehyde (BEF) was synthesized and characterized by elemental analysis, FTIR, UV visible, 1H and 13C-NMR. Ternary copolymer metal complexes were prepared with metal ions such as Cu2 +, Ni2 + and Zn2 + using bef terpolymer as ligand. The complexes were characterized by elemental analysis, IR, UV visible, ESR, 1H-NMR and 13C-NMR spectra. Gel permeation chromatography is used to determine the molecular weight of ligands. The surface characteristics and crystallization behavior of the ligands and their complexes were analyzed by scanning electron microscopy and X-ray diffraction. The thermal stability of ligands and their metal complexes was analyzed by thermogravimetric analysises. Kinetic parameters such as activation energy and order of reaction () and thermodynamic parameters, namely, , , , and , were calculated using Freeman-Carroll (FC), Sharp-Wentworth (SW), and Phadnis-Deshpande (PD) methods. Thermal degradation model of the terpolymer and its metal complexes was also proposed using PD method. Biological activities of the ligand and its complexes were tested against Shigella sonnei, Escherichia coli, Klebsiella species, Staphylococcus aureus, Bacillus subtilis, and Salmonella typhimurium bacteria and Aspergillus flavus, Aspergillus niger, Penicillium species, Candida albicans, Cryptococcus neoformans, Mucor species fungi.

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