Cascade reaction-based rapid and ratiometric detection of H<sub>2</sub>S/S<sup>2−</sup> in the presence of bio-thiols with live cell imaging: demasking of ESIPT approach
For the rapid, ratiometric, fluorogenic and “naked eye” detection of H2S/S2−, a pro-excited state intramolecular proton transfer (ESIPT)-based receptor, 2-formyl-benzoic acid 2-benzothiazol-2-yl-phenyl ester (FBBP), has been designed.