Bis-imidazolium and benzimidazolium based gemini-type ionic liquids structure: synthesis and antibacterial evaluation

Abstract

Based on bis-imidazolium and benzimidazolium, new sets of geminal dicationic ionic liquids containing a sulphonamide moiety were successfully synthesized with good yields. Their structures were confirmed by ¹H-NMR, ¹³C-NMR, FT-IR, and mass spectroscopy. Selected physicochemical properties of these ILs including thermal stability by TGA and miscibility in some common organic solvents and water were also determined. Most of the prepared dicationic ILs displayed significant levels of antibacterial activities against ten selected bacterial strains of Gram-positive and Gram-negative using a micro-broth dilution assay.