A novel benzidine based Schiff base “turn-on” fluorescent chemosensor for selective recognition of Zn2+

A novel chemo-sensor based on diaminobenzidine (H2L) was synthesized and characterized. The chemo-sensor shows selective “turn-on” fluorescence response to Zn2+ ion over a variety of other competing metal ions such as Al3+, Mn2+, Fe3+, Co2+, Ni2+, Cu2+, and Cd2+. The strong fluorescent emission can be observed even at ppm level concentration of the probe in the presence of Zn2+ with over 54 fold intensity enhancement at 509 nm. Similar...