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Metal Complexes of a Novel Terpolymer Ligand: Synthesis, Spectral, Morphology, Thermal Degradation Kinetics and Antimicrobial Screening

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Abstract

2-amino-6-nitro-benzothiazole and thiosemicarbazide with formaldehyde (BTF) terpolymer ligand and its metal complexes have been synthesized. The plausible structure of the synthesized BTF terpolymer ligand was elucidated on the basis of elemental analysis and spectral studies such as FTIR, UV-Vis, 1H and 13C NMR spectroscopy. Gel permeation chromatography (GPC) was used to determine the molecular weight of the terpolymer. The terpolymer metal complexes were analyzed by elemental analysis, molar conductivity measurements, and magnetic susceptibilities. The structure and geometry of the metal complexes were confirmed by various spectral techniques viz. electronic, ESR, FTIR and NMR spectroscopy. The morphology of the BTF terpolymer ligand and its metal complexes was examined using scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The thermal decomposition behaviour of the terpolymer ligand and its complexes was determined using thermogravimetric analysis (TGA). Freeman–Carroll (FC), Sharp–Wentworth (SW) and Phadnis–Deshpande (PD) methods were used to calculate the thermal activation energy (Ea), order of reaction (n), entropy change (ΔS), free energy change (ΔF), apparent entropy (S*) and frequency factor (Z) from the TGA data. Phadnis–Deshpande method was also used to propose the thermal degradation model for the decomposition pattern of the terpolymer ligand. The terpolymer ligand and its metal complexes were screened for its antimicrobial activity against chosen microbes.

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Acknowledgments

The authors thank the Management and Principal of Jamal Mohamed College, Oxford Engineering College, Tiruchirappalli, Tamil Nadu and Dr. D. Jeyakumar, Scientist, Central Electrochemical Research Institute (CECRI-CSIR), Karaikudi, Tamil Nadu for their support and encouragement.

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Authors and Affiliations

  1. Department of Chemistry, Oxford Engineering College, Pirattiyur, Tiruchirappalli, 620 009, Tamil Nadu, India

    Mohamed A. Riswan Ahamed

  2. PG and Research Department of Chemistry, Jamal Mohamed College (Autonomous), Tiruchirappalli, 620 020, Tamil Nadu, India

    Abdul R. Burkanudeen

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  1. Mohamed A. Riswan Ahamed
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  2. Abdul R. Burkanudeen
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Correspondence to Abdul R. Burkanudeen.

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Ahamed, M.A.R., Burkanudeen, A.R. Metal Complexes of a Novel Terpolymer Ligand: Synthesis, Spectral, Morphology, Thermal Degradation Kinetics and Antimicrobial Screening. J Inorg Organomet Polym 22, 1046–1061 (2012). https://doi.org/10.1007/s10904-012-9677-9

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