Highly selective recognition of L‐phenylalanine with molecularly imprinted polymers based on imidazolyl amino acid chiral ionic liquid

: Several amino acid chiral ionic liquids were introduced as functional monomers to prepare molecularly imprinted polymers for specific recognition of L-phenylalanine. Among them, the imprinted polymers L-Phe@MIPs based on [ViImC3][L-Pro] showed the best selective recognition ability for L-phenylalanine. A series of experiments such as dynamic adsorption, static adsorption, and competitive adsorption were conducted to investigate the specific recognition ability and adsorption capacity of the L-Phe@MIPs. It is found that the adsorption efficiency to L-phenylalanine on L-Phe@MIPs was 3.11 times higher than that to D-phenylalanine. All the results demonstrated that the L-Phe@MIPs possessed good recognition and relatively high adsorption efficiency for L-phenylalanine. Besides, the recovery of L-phenylalanine was above 98%, and the L-Phe@MIPs exhibited good reusability.