Benzothiazole based multi-analyte sensor for selective sensing of Zn2+ and Cd2+ and subsequent sensing of inorganic phosphates (Pi) in mixed aqueous medium

Abstract

A rationally designed simple benzothiazole based Schiff base probe (L) exhibits distinct selective “turn-on” emission responses in the presence of Zn²⁺ and Cd²⁺ ions. Emission wavelengths over 600 nm were achieved with both the metal ions, which makes the system more viable for the study in biological complex medium. Further “turn-off” fluorometric response for the inorganic phosphates was achieved with both the L–Zn²⁺ and L–Cd²⁺ ensembles. The entire sensing process is perceptible to the naked eye and is viable in mixed buffered medium at physiological pH.