Thermoanalytical, spectral and biological study of 4-bromobenzoatozinc(II) complexes containing bioactive organic ligands

0383254 - ÚMCH 2013 RIV HU eng J - Journal Article
Krajníková, A. - Györyová, K. - Kovářová, Jana - Hudecová, D. - Hubáčková, J. - El-Dien, F. N. - Koman, M.
Thermoanalytical, spectral and biological study of 4-bromobenzoatozinc(II) complexes containing bioactive organic ligands.
Journal of Thermal Analysis and Calorimetry. Roč. 110, č. 1 (2012), s. 177-185. ISSN 1388-6150. E-ISSN 1588-2926
Institutional support: RVO:61389013
Keywords : zinc 4-bromobenzoate * IR spectroscopy * thermal behaviour
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 1.982, year: 2012

New zinc(II) 4-bromobenzoate complex compounds with general formula [Zn(4-BrC6H4COO)2L2] . xH2O (where L = urea, nicotinamide, phenazone or thiourea, x = 0–2) 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.
Permanent Link: http://hdl.handle.net/11104/0213254