Synthesis, characterization, and study mode of coordination of N,N’- and N,O - (arene)ruthenium II complexes co-ligated by isoniazid: Preparation for antimicrobial studies

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dc.contributor.advisorOnani, Martin O.
dc.contributor.authorDiyoka, Nkongolo Jean Blaise
dc.date.accessioned2019-02-12T08:34:22Z
dc.date.accessioned2024-05-09T10:49:50Z
dc.date.available2019-02-12T08:34:22Z
dc.date.available2024-05-09T10:49:50Z
dc.date.issued2018
dc.description>Magister Scientiae - MScen_US
dc.description.abstractThis thesis reports on the syntheses of complexes of (arene) ruthenium (II) isoniazid Schiff base ligands for antimicrobial studies. Isoniazid Schiff base ligands; isonicotinyl acid (2-hydroxy-5- methyl-benzilidene)-hydrazide (L1), isonicotinyl acid (2-hydroxy-5-methoxy-benzilidene)- hydrazide (L2), isonicotinyl acid (-5-chloro-2-hydroxy-benzilidene)-hydrazide (L3), isonicotinyl acid (-5-bromo-2-hydroxy-benzilidene)-hydrazide (L4), isonicotinyl acid (2-hydroxy-5-nitrobenzilidene)- hydrazide (L5) were prepared by condensation reaction under reflux from equimolar amounts of isioniazid, which is an amine, with five different aldehyde moieties. Ruthenium (II) complexes of these isoniazid Schiff base ligands (C1 - C5) were prepared in an ethanolic solution under reflux and inert atmosphere at 60°C using Schlenk techniques. Fourier transform infrared spectroscopy (FTIR), ultraviolet – visible spectroscopy, thermogravimetric analysis, nuclear magnetic resonance and elemental analysis were the characterization techniques that confirmed the successful preparation of the ligands. All the ligands spectra displayed the imine functional group peak which confirmed the successful preparation. The ligands L1 – L5 and the complexes C1 – C5 were subjected to similar characterization techniques which further confirmed the successful syntheses and the coordination of metal and ligand by displaying a shift in their respective imine peaks and transitions values. All the synthesized compounds were subjected to a standard antimicrobial test using three microorganisms, Staphylococcus aureus, Methicillin resistant Staphylococcus aureus and Pseudomonas aeruginosa. Out the ten compounds tested, only ligand L5 gave the best results against Staphylococcus aureus.en_US
dc.identifier.urihttps://hdl.handle.net/10566/14406
dc.language.isoenen_US
dc.publisherUniversity of the Western Capeen_US
dc.rights.holderUniversity of the Western Capeen_US
dc.subjectIsoniaziden_US
dc.subjectAntimicrobial studiesen_US
dc.subjectSpectroscopyen_US
dc.subjectSynthesesen_US
dc.subjectLigandsen_US
dc.titleSynthesis, characterization, and study mode of coordination of N,N’- and N,O - (arene)ruthenium II complexes co-ligated by isoniazid: Preparation for antimicrobial studiesen_US

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