A novel ratiometric fluorescent H2S probe based on tandem nucleophilic substitution/cyclization reaction and its bioimaging

A novel fluorescence H2S probe based on tandem nucleophilic substitution/cyclization reaction was obtained, which is a ratiometric fluorescent probe possessing good water solubility, membrane permeability, and compatibility with living cells for selective detection of ex-/endogenous H2S in living cells.263