Colorimetric and ratiometric fluorescent detection of sulfite in water via cationic surfactant-promoted addition of sulfite to α,β-unsaturated ketone

Three fluorescent probes were constructed by incorporating an α,β-unsaturated ketone to a coumarin fluorophore. The selective addition of sulfite to the alkene of TSP assisted by CTAB micelle can be visualized by dramatic color and ratiometric fluorescence changes. Probe TSP1 was used to detect sulfite in realistic samples with good recovery.