1. Cys, Hcy, and GSH) to the NM-Cl+HS -solution, respectively, their additions failed to reduce fluorescence. It is noteworthy that ClO -has moderate oxidation capacity, however, the introduction of other oxidizing agents including H 2 O 2 , ClO 4 -, O 2 -, and ONOO -proved ineffective in quenching the fluorescence, which further indicated the high selectivity of NM-Cl+HS -system toward ClO -. This excellent selectivity was clearly displayed by the color change observable in the solutions. The color change was solely observed when ClO -was added to the solution (Fig. 2B). The change in time-dependent fluorescent intensity (Fig. 2C) suggested a faster occurring interaction between ClO -and NM-Cl+HS -system, with the fluorescent intensity reaching its lowest value after 30 s. Fig. 2C depicts the fluorescence spectra of the NM-Cl+HS -system, revealing a gradual decrease in the fluorescent intensity upon the addition of ClO;I E Cl;Specific fluorescent response of NM-Cl+HS -to ClO -A NM-Cl+HS -system was prepared by stirring the mixture of NM-Cl with 1.0 equiv. NaHS in H 2 O for 0.5 h, then the solvents were evaporated, and the solid was diluted to 3.33�10 -5 M in DMSO/HEPES buffer solution
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