Abstract
Abstract Graphene quantum dots (GQDs) were prepared by pyrolysis of citric acid, and then incorporated into β-cyclodextrin (β-CD) via H-bonds between the oxygen-containing groups on GQDs and the hydroxyl groups on β-CD. The nanocomposites of GQDs and β-CD (GQDs/β-CD) were negatively charged due to the ionization of carboxyl groups of GQDs, and therefore they could be effectively electrodeposited onto a glassy carbon electrode (GCE). The electrodeposited GQDs/β-CD were optically active due to the introduction of β-CDs with well-defined hydrophobic central cavities, and it was employed as an electrochemical chiral interface for enantiorecognition of tryptophan (Trp) isomers.
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