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Spectroscopic, thermal and kinetic studies of coordination compounds of Zn(II), Cd(II) and Hg(II) with norfloxacin

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Abstract

Some metal complexes of norfloxacin (NOR) with the formula [M(NOR)2]X2·nH2O [M = Zn(II), (X = Cl−, AcO−, Br− and I−), Cd(II), (X = Cl−, NO3 − and SO4 2−) and Hg(II) (X = Cl−, NO3 − and AcO−)] have been synthesised and studied using elemental analysis (CHN), electronic (UV–vis, mid infrared, mass, and 1H-NMR spectra), TG and DTA. The thermal decomposition processes of these complexes were discussed. The Correlation coefficient, the activation energies, E*, the pre-exponential factor, A, the entropies, S*, enthalpies, H* and Gibbs free energies, G*, of the thermal decomposition reactions have been derived from thermogravimetric (TG) and differential thermogravimetric (DTG) curves. The characterization of the final products of the decomposition was achieved by IR spectra and X-ray powder diffraction (XRD). Using the Coats–Redfern and Horowitz–Metzeger methods, kinetic analysis of the thermogravimetric data is performed.

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Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Port-Said, Suez Canal University, Port-Said, Egypt

    Moamen S. Refat, Mohamed S. El-Garib & Mostafa A. Hussien

  2. Chemistry Department, Faculty of Science, Taif University, Taif, Kingdom of Saudi Arabia

    Moamen S. Refat

  3. Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt

    Gehad G. Mohamed

  4. Núcleo de Pesquisa e Desenvolvimento da Educação Matemática e Científica, Universidade Federal do Pará (UFPA), Belém, Brazil

    Robson F. de Farias

  5. Institute of Inorganic Chemistry, University of Karlsruhe, Karlsruhe, Germany

    Annie K. Powell & Mostafa A. Hussien

  6. Chemistry Department, Faculty of Science, Ismailia, Suez Canal University, Ismailia, Egypt

    Sabry A. El-Korashy

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  1. Moamen S. Refat
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  2. Gehad G. Mohamed
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Correspondence to Moamen S. Refat.

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Refat, M.S., Mohamed, G.G., de Farias, R.F. et al. Spectroscopic, thermal and kinetic studies of coordination compounds of Zn(II), Cd(II) and Hg(II) with norfloxacin. J Therm Anal Calorim 102, 225–232 (2010). https://doi.org/10.1007/s10973-009-0404-x

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  • DOI: https://doi.org/10.1007/s10973-009-0404-x

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