A solo fluorogenic probe for the real-time sensing of SO32− and SO42−/HSO4− in aqueous medium and live cells by distinct turn-on emission signals

A judiciously designed fluorogenic probe (L) rendered rapid and differential turn-on responses by exhibiting strong blue fluorescence (λem = 442 nm) for SO32− and greenish-yellow fluorescence (λem = 511 nm) for SO42−/HSO4− in 100% aqueous medium and live cells.