New zinc(II) 3-aminobenzoates with bioactive ligands: Synthesis, thermal, spectral and antimicrobial properties
2018
Abstract Zinc(II) 3-aminobenzoate (3-NH 2 benz ) as well as four new coordination compounds containing ligands L (thiourea – tu , nicotinamide – nad ; isonicotinamide – inad ; N,N -diethylnicotinamide – dnad ) with general formula of [Zn(3-NH 2 benz ) 2 L 2 ] were synthesized and characterized by elemental analysis and IR spectroscopy. Thermoanalytical methods (TG/DTG, DTA) were used in order to compare the thermal decomposition of synthesized compounds with previously prepared 2- and 4-aminobenzoates. The intermediates and the final product of thermal decomposition were proved by spectroscopic methods. The antimicrobial activity of the zinc(II) 3-aminobenzoate complexes against various strains of bacteria, yeasts and filamentous fungi was determined and compared with 2- and 4-aminobenzoates as well. According to obtained results complexes with thiourea and N,N -diethylnicotinamide exhibit activity towards filamentous fungi R. oryzae , and A. Alternata, yeast C. Albicans , as well as bacteria S. aureus .
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