A dual-response fluorescent probe for discriminative sensing of hydrazine and bisulfite as well as intracellular imaging with different emission

•A smart dual-response fluorescent probe with fast response was developed.•The probe is capable of distinguish the determination HSO3- and N2H4.•The dual-responses behaviors were attribute to diverse reaction sites.•The probe employed to image HSO3- and N2H4 in living cells using different channel.