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• W2794429583 abstract "Abstract Hypochlorite plays crucial roles in various human activities and is involved in many diseases. Therefore, facile and accurate detection of hypochlorite is imperative. In the current study, a coumarin-fused rhodol derivative (CR-Ts) with a sulfonohydrazide hypochlorite recognition unit was synthesized and validated for its ability to detect hypochlorite in real samples. Both the related intermediate, CR, and CR-Ts were fully characterized, including their X-ray crystal structures. Unlike previously reported methods, the CR-Ts probe, which is based on the unique, pH-modulated, ring-opening reactions of the coumarin-rhodol hybrid, displayed selective, dual-fluorescent turn-on responses to hypochlorite without interferences from many metal ions and other reactive oxygen/nitrogen species. In acidic media, only the five-membered spiro-ring opened, which resulted in an obvious color change and fluorescence enhancement, and both the five-membered spiro-ring and six-membered lactone ring opened under alkaline conditions to exhibit another color change and more intense fluorescence. The reaction mechanism was also investigated via a pKa study and was confirmed by mass spectrometry. The limit of detection (LOD) for hypochlorite in alkaline conditions (21.53 nM) is approximately four times more sensitive than that in acidic media (88.01 nM). The proposed method was successfully used to detect the hypochlorite concentration in tap water and commercial disinfectants, and consistent results with low discrepancies were obtained." @default.
• W2794429583 created "2018-03-29" @default.
• W2794429583 creator A5038256949 @default.
• W2794429583 creator A5072158846 @default.
• W2794429583 date "2018-08-01" @default.
• W2794429583 modified "2023-10-16" @default.
• W2794429583 title "Dual-responsive fluorescent probe for hypochlorite via pH-modulated, ring-opening reactions of a coumarin-fused rhodol derivative" @default.
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• W2794429583 doi "https://doi.org/10.1016/j.snb.2018.03.147" @default.
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