A novel selective fluorescent chemosensor for Cu(II)

A novel fluorescence enhancement Cu2+ chemosensor derived from coumarin was prepared. Emission study found that it exhibits evident Cu2+-amplified fluorescence prior to Co2+, Pb2+, Mg2+, Mn2+, Ni2+, Zn2+, Fe3+, Ag+ and Cd2+, and the largest emission enhancement factor is about 9 at a ratio of 2: 1 (chemosensor 1/Cu2+).