Fe3+-selective fluorescent probe based on aminoantipyrine in aqueous solution

A novel and simple Schiff base composed with 9-anthraldehyde and 4-aminoantipyrine was synthesized and characterized as a fluorescent probe. In the presence of Fe3+, the fluorescent intensity has a dramatic enhancement over other examined metal ions in aqueous solution. The method of Job’s plot indicated the formation of 1:1 complex between probe and Fe3+, and the possible binding mode of the system was also proposed. Moreover, other examined metal ions had no effect on the detection of Fe3+.

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► We designed and synthesized a new Schiff base fluorescent probe.
► The probe showed high sensitivity for Fe3+ over other metal ions in aqueous solution.
► The other metal ions have no effect on the detection of Fe3+.