Selective Recognition of Fe³⁺ by a Simple Schiff Base Chemosensor

Abstract A simple and easily synthesized Schiff base chemosensor 1 was prepared by the one-step condensation reaction of 3-acetyl-4-hydroxycoumarin and 1-naphthylamine. The metal ion recognition ability of the chemosensor was measured by UV-Vis spectrophotometer. It demonstrated that its absorbance at 327 nm enhanced upon addition of Fe3+ significantly. The absorption intensities at 327 nm fitted good linear relation (R 2=0.9928) to Fe3+ concentration in DMF. 1 is able to recognize Fe3+ selectively over other ions. The synthesized chemosensor 1 would be useful to detect Fe3+ qualitatively and quantitatively.