Highly Selective Detection of Paraoxon in Food Based on the Platform of Cu Nanocluster/MnO₂ Nanosheets.

ABSTRACT: Selective and sensitive identification of paraoxon residue in agricultural products is greatly significant for food safety but remains a challenging task. Herein, a detection platform was developed by integrating Cu nanoclusters (Cu NCs) with MnO₂ nanosheets, where the fluorescence of Cu NCs was effectively quenched. Upon introducing butyrylcholinesterase and butyrylcholine into the system, their hydrolysate, thiocholine, leads to the decomposition of the platform through a reaction between the MnO₂ nanosheets and thiol groups on thiocholine. The electron-rich groups on thiocholine can further promote the fluorescence intensity of Cu NCs through host-guest interactions. Adding paraoxon results in the failure of fluorescence recovery and further promotion, which could

SUBMITTER: Liu S 

PROVIDER: S-EPMC9100620 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature