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Thermoanalytical, spectral and biological study of 4-bromobenzoatozinc(II) complexes containing bioactive organic ligands |
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| Authors: | Annamária Krajníková Katarína Gy?ryová Jana Ková?ová Daniela Hudecová Jana Hubá?ková Faten Nour El-Dien Marián Koman |
| Affiliation: | 1. Institute of Chemistry, P.J. ?af??rik University, Moyzesova 11, 041 54, Ko?ice, Slovak Republic 2. Institute of Macromolecular Chemistry, AV CR, Heyrovsk??ho n??m. 2, 162 06, Prague, Czech Republic 3. Department of Biochemistry and Microbiology, Slovak University of Technology, Radlinsk??ho 9, 812 37, Bratislava, Slovak Republic 4. Chemistry Department, Faculty of Science, Cairo University Giza, Giza, 12613, A.R. Egypt 5. Department of Inorganic Chemistry, Slovak Technical University, Radlinsk??ho 9, 812 37, Bratislava, Slovak Republik |
| Abstract: | New zinc(II) 4-bromobenzoate complex compounds with general formula [Zn(4-BrC6H4COO)2L2]·xH2O (where L?=?urea, nicotinamide, phenazone or thiourea, x?=?0?C2) were prepared and characterized by elemental analysis, IR spectroscopy and thermal analysis. The thermal decomposition of hydrated compounds started with dehydration process. During the thermal decomposition, the neutral organic ligand, bis(4-bromophenyl)methanone and carbon dioxide were evolved. The solid intermediates and volatile products of thermal decomposition were proved by IR spectroscopy and mass spectrometry. The final solid product of the thermal decomposition heated up to 800?°C was zinc oxide, which was confirmed by X-ray powder diffractometry. Antimicrobial activity of the prepared compounds was tested against various strains of bacteria, yeasts and filamentous fungi (E. coli, S. aureus, C. albicans, R. oryzae, A. alternata and M. gypseum). It was found that bacterium S. aureus and fungi A. alternata are the most sensitive to the studied compounds. |
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