Akademik Veri Yönetim Sistemi
Letters in Organic Chemistry, cilt.17, sa.7, ss.539-547, 2020 (SCI-Expanded)
A series of polybenzimidazole was synthesized by the solution polycondensation reaction of 3,3´-diaminobenzidine (DAB) with dicarboxylic acid derivatives. The synthesized polybenzimidazoles were characterized by using IR,1H-NMR, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). TGA and DSC studies showed that the polybenzimidazoles have good thermal sta-bility and are generally amorphous in nature. Glass transition temperature (Tg) values were found to be in the range of 300-410°C. This is the first detailed study to investigate the antimicrobial activities of the polybenzimidazoles. The synthesized polybenzimidazoles have high antimicrobial activity com-pared to benzimidazole molecules. It was also found that they are more effective against bacterial species than fungal species. The polymers 2, 5, 6, 7, having-1,3-phenyl, vinyl,-1-OH-3,5-phenyl and 4,4ʹ′-oxybisphenyl rings, showed remarkable activity against tested bacterial species (MIC = 32-500 µg/mL). Among these polymers, the polymers 6 and 7 having additional electronegative moiety have the highest activity against tested bacterial species.