Tris-imidazolium and benzimidazolium ionic liquids: a new class of biodegradable surfactants

摘要: Novel series of tetra-cationic ionic liquids containing alkyl or phenyl side chains and ester groups within the same molecule were successfully prepared. Based on imidazolium benzimidazolium, these synthesized from readily available starting materials in high yield. Surfactant properties including liquid crystalline behaviour surface as well their biodegradability investigated. Tetrakis-imidazolium compounds showed assembly pure form (i.e. spontaneously) presence polar nonpolar solvents, while both benzimidazolium effectively reduced tension water range 29–34 mN m−1. The incorporation tetra into with tetra-ester groups, significantly improved biodegradation. ‘Closed-Bottle Test’ OECD 301D sodium n-dodecyl sulphate (SDS) a reference used for evaluation. linear butyl, hexyl, octyl, decyl dodecyl) tetrakis-imidazolium promote increasing biodegradation phase results comparing to aromatic side-chains.