Progress in study on coumarin-derived fluorescent chemosensors for metal ions was reviewed. Structures, synthetic methods,
and recognition mechanism of coumarin-based probes were introduced and fluorescent recognition behavior of the probes toward various
metal ions (Hg2+, Cu2+, Zn2+, Fe3+, Mg2+, Pb2+, Ag+, Ni2+, alkali metal ions, Ca2+, Cr3+, Ba2+, Cd2+, Al3+, As3+, Co2+, and Au3+) was outlined.
Development trends in coumarin-derived fluorescent chemosensors were proposed.