Browsing by Author "Adimula, V. O."

Now showing 1 - 3 of 3
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    Chelation, Characterization and Antimicrobial screening of Mixed Isoniazid - Vitamin C complexes
    (Faculty of Natural Sciences, Al- Hikmah University, Ilorin, Nigeria, 2017-05-04) Bamigboye, M. O.; Obaleye, J. A.; Lawal, A.; Babamale, H. F.; Ajibola, A. A.; Adimula, V. O.; Lawal, M.
    In this study, mixed Zn(II), Cu(II), Co(II) complexes of Isoniazid and vitamin C were synthesized and characterized by melting point, conductivity measurement, Fourier Transform Infra-red (FT-IR), Atomic Absorption Spectroscopy and elemental analyses. The bonding nature of the mixed parent ligands and the structure of the complexes were based on analytical and spectroscopic techniques. The complexes were proposed to have the formula [M1L1L2(Cl2)], [M2L1L2(SO4)], [M3L1L2(Cl2)] where M1 = Zn(II), M2 = Cu(II), M3= Co (II) L1= Isoniazid and L2 = Vitamin C. The infra-red data relate to the results of the most informative and indicative region. The result of spectra data confirmed that the two ligands were bidentate in their mode of coordination with the metal ions. The complexes are in octahedral geometry and the molar conductance was found to be non-electrolytic in nature. Antimicrobial test was carried out against four bacterial species namely Bacillus subtilus, Staphylococuss aureus, Escherichia coli and Pseudomonas aeroginosa. All the complexes showed higher antibacterial activity at the same concentration against the microorganisms used compared to the ligands
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    Coordination Polymer Based on Mixed Carboxylate Ligands: Synthesis and Thermal Studies
    (Faculty of Science, Ankara University, Turkey, 2018-09-10) Adimula, V. O.; Tella, A. C.; Udeaga, I. C.; Durodoye, A. T.; Lawal, A.
    The synthesis of Co(II), Cu(II), Fe(II) and Zn(II) based coordination compounds using terephthalic acid (BDC), tartaric acid (DHB), and 4hydroxybenzoic acid (4-HBA) as ligands by a solvent-based and solvent-free methods were reported. Thermal studies of the complexes performed in the temperature range of 30 ºC-950 °C showed a 9.406% weight loss observed between 200 ºC-517 ºC for [Co(DHB)(4-HBA)] complex, and a 1.883 % weight loss observed between 80 ºC352.68 ºC for [Cu(DHB)(4-HBA)] complex
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    Solid- State Synthesis and Characterization of Cu (II) Complexes of 3,4,5- Trihydroxyl Benzoic acid
    (Faculty of Physical Sciences, University of Ilorin, Ilorin, Nigeria., 2017-11-30) Adimula, V. O.; Tella, A. C.; Lawal, A.; Shalme, N.
    Copper(II) complexes of 3,4,5-trihydroxybenzoic acid, formulated as [Cu(THB)(CH3COO)2] (1a and 1b), prepared by the solid state mechanochemical method (1a) of grinding Cu(CH3COO)2.H2O and 3,4,5trihydroxybenzoic acid in a mortar using a pestle in the absence of a solvent, and a solvent-based method of stirring in ethanol at room temperature (1b) is herein described. Characterization of the synthesized complexes was done by the methods of FT-IR and UV-Vis spectroscopy, PXRD analysis, elemental analysis, and melting point determination. Data obtained from the analytical and spectroscopic techniques indicated that the synthesized compounds, 1a and 1b, are identical. The Cu(II) ion was observed to coordinate to the ligand via the oxygen atom of two of the hydroxyl groups of the ligand resulting in the synthesized [Cu(THB)(CH3COO)2] complexes having a tetrahedral geometry with the ligand binding in a bidentate manner. The solid state mechanochemical synthesis technique offers a simple, quick and environmentally friendly route towards the preparation of metal complexes at the same time giving quantitative yield compared to the solvent-based method of synthesis.