A simple and easily synthesized colorimetric and fluorescent chemosensor 1, based on naphthol moieties
as a binding and signaling unit, has been synthesized in a one step procedure. Chemosensor 1 exhibited a
color change from yellow to orange and fluorescence enhancement with a red shift upon binding to Al3þ
in acetonitrile. Moreover, it can selectively detect Cu2þ ions via an ion-promoted oxidation reaction in
acetonitrile, resulting in a selective color change from yellow to dark blue and a fluorescence quenching
effect. Furthermore, chemosensor 1 showed colorimetric and fluorescence selectivity for Cu2þ in aqueous
acetonitrile solution.