Application of optically active chiral bis- (imidazolium) salts as potential receptors of chiral dicarboxylate salts of biological relevance

摘要

A family of chiral bis(imidazolium) salts derived from natural amino acids has been synthesized by a simplesynthetic approach and the corresponding bis(trifluoromethylsulfonyl)imide salts have been shown to beroom temperature chiral ionic liquids (RTCILs). The structures and self-assembling properties of theresulting salts have been studied by 1HNMR, ATR-FTIR, DSC, SEM and theoretical calculations. Moreover,these receptors have been applied to the enantiomeric recognition of dicarboxylic amino acids.The supramolecular complexes formed have been studied by 1HNMR titration experiments, ATR-FTIRand DSC.