A fluorescent probe for alkaline phosphatase via excited state intramolecular proton transfer

- A new fluorescent probe for ALP via excited-state intramolecular proton transfer.
- It exhibits sensitive and very low detection limit for ALP.
- It is of little cytotoxicity and can be easily internalized into cells for endogenous ALP imaging.
- It is capable of detecting ALP in biological fluid like serum.