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Novel Diphenyl Methane Based Quaternary Ammonium Surfactants: Synthesis, Surface Properties and Antimicrobial Activity

Abstract A homologous series of cationic gemini diphenyl methane quaternary ammonium salts have been synthesized via chloromethylation of diphenyl methane followed by quaternization using tertiary amines with different chain length. The chemical structures of the prepared surfactants were confirmed using different spectroscopic techniques including, FTIR and 1H-NMR spectra. Surface activity of these compounds have been thoroughly studied and their surface properties including surface and interfacial tension, emulsification power, critical micelle concentration, effectiveness, efficiency, maximum surface excess and minimum surface area were determined. The new synthesized surfactants were screened as antimicrobial agents against different strains of bacteria, yeast and fungi.