Journal of Thermal Analysis and Calorimetry

, Volume 102, Issue 1, pp 225–232 | Cite as

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

  • Moamen S. Refat
  • Gehad G. Mohamed
  • Robson F. de Farias
  • Annie K. Powell
  • Mohamed S. El-Garib
  • Sabry A. El-Korashy
  • Mostafa A. Hussien
Article

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 SO42−) 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.

Keywords

Norfloxacin Thermal analysis Infrared spectra Kinetic data Complexes 

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  • Moamen S. Refat
    • 1
    • 2
  • Gehad G. Mohamed
    • 3
  • Robson F. de Farias
    • 4
  • Annie K. Powell
    • 5
  • Mohamed S. El-Garib
    • 1
  • Sabry A. El-Korashy
    • 6
  • Mostafa A. Hussien
    • 1
    • 5
  1. 1.Chemistry Department, Faculty of Science, Port-SaidSuez Canal UniversityPort-SaidEgypt
  2. 2.Chemistry Department, Faculty of ScienceTaif UniversityTaifKingdom of Saudi Arabia
  3. 3.Chemistry Department, Faculty of ScienceCairo UniversityGizaEgypt
  4. 4.Núcleo de Pesquisa e Desenvolvimento da Educação Matemática e CientíficaUniversidade Federal do Pará (UFPA)BelémBrazil
  5. 5.Institute of Inorganic ChemistryUniversity of KarlsruheKarlsruheGermany
  6. 6.Chemistry Department, Faculty of Science, IsmailiaSuez Canal UniversityIsmailiaEgypt

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