Abstract
Amino acids play a very important role in the fields of pharmacy and biochemistry, and the identification of amino acid enantiomers has become a research hotspot. In this study, chiral nanomaterials ZnFe2O4-L-Cys (Cys = cysteine) were prepared by the mechanical stirring method and characterizad by different kinds of techniques. The effect of pH and Cu2+ on the recognition of tryptophan by chiral nanomaterials ZnFe2O4-L-Cys was further explored by ultraviolet–visible spectroscopy. The experimental results show that when the pH of the recognition environment is neutral, ZnFe2O4-L-Cys can be used as chiral selectors for tryptophan enantiomers in the presence of Cu2+ and the absorbance of L-Trp is always stronger than D-Trp within a certain concentration range, which provides a novel and convenient way for the chiral recognition of tryptophan enantiomers.
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