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  • Title: A turn-on fluorescent probe based on quinoline and coumarin for rapid, selective and sensitive detection of hypochlorite in water samples.
    Author: Liu R, Zhao Y, Cui X, Sun X, Fei Q, Feng G, Shan H, Huan Y.
    Journal: Luminescence; 2020 Dec; 35(8):1231-1237. PubMed ID: 32500652.
    Abstract:
    A fluorescent probe L-Cu2+ based on quinoline, coumarin and Cu2+ has been synthesized and characterized for hypochlorite determination. After copper ion was added to the solution of ligand L, the fluorescence quenching at 490 nm might result from a ligand-metal charge transfer (LMCT) process and its strong coordination ability for Cu2+ . In the presence of hypochlorite, the structure of ligand L was destroyed to form 7-(diethylamino)-coumarin-3-carboxylic acid, and the fluorescence was restored at 460 nm. In this case, L-Cu2+ complex could be used as a fluorescent probe to detect hypochlorite, with the advantages of rapid, selective, wide linear range and low detection limit.
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