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  • Title: A novel dual-emission fluorescent probe for ratiometric and visual detection of Cu2+ ions and Ag+ ions.
    Author: Wu J, Li R, Liu S.
    Journal: Anal Bioanal Chem; 2022 Apr; 414(9):3067-3075. PubMed ID: 35106615.
    Abstract:
    In this work, the biomolecule glutathione was used to prepare cyan fluorescent carbon dots (GSH@CDs) by a hydrothermal method. The GSH@CDs were adopted as the scaffolds to synthesize fluorescent gold nanoclusters (GSH@CDs-Au NCs) with two independent emission peaks at 430 nm and 700 nm. A fluorescent method for the Cu2+ and Ag+ ion assay was established based on the fluorescence quenching or enhancement at 700 nm of GSH@CDs-Au NCs. The fluorescent test strips were successfully prepared for visual detection of Cu2+ ions and Ag+ ions based on GSH@CDs-Au NCs. In addition, GSH@CDs-Au NCs were found to possess well peroxidase-like activity.
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