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  • Title: Chlorination-induced pKa decrease: an improved strategy to design ratiometric hypochlorite fluorescent probes with ideally high selectivity.
    Author: Han S, Ding B, Xiong H, Zuo B, Ye Y, Li H, Song X.
    Journal: Analyst; 2022 Nov 21; 147(23):5300-5305. PubMed ID: 36345932.
    Abstract:
    Based on the selective ClO--triggered chlorination reaction and the subsequent pKa decrease of phenols, a new strategy was developed for rationally designing ratiometric ClO- fluorescent probes with high selectivity. By investigating the fluorescence responses of 6-cyano-2-naphthol toward ClO- and the pKa-dependent response mechanism, we developed a rapid, sensitive and selective two-photon ratiometric fluorescent probe, Naph-DFOB, to detect ClO-. This probe displayed a ratiometric fluorescence change (from 509 nm to 628 nm) toward ClO- and was successfully applied to image intracellular ClO- in living cells with two-photon excitation. Using Naph-DFOB as a useful tool, the investigation of lipopolysaccharide (LPS)-induced acute lung injury in a mouse model was effectively performed.
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