EEfficient Detection of CN- and Cu2+Ions by Styryl-BODIPY based Multifunctional Chemosensor in Semi-aqueous Medium

A styryl-BODIPY based receptor (SBT) has been designed and synthesized as an effectual colorimetric chemosensor for selective and rapid sensing of CN- and Cu2 + ions in semi-aqueous medium. The recog-nising behaviour was confirmed through colorimetric, UV-Vis and fluorescent spectroscopic studies. The synthesized receptor (SBT) exhibited eminent optical colour changes from pink to colourless and light green in presence of aqueous solutions of CN- and Cu2 + ions respectively. In the sensing of CN -, a shift in absorption peak from 555 nm to 374 nm was linearly dependent on concentration of cyanide ion in the range of 1 mu M to 55 mu M which results the detection limit of 1.40 mu M. Along with this, optical studies indicated that sensor (SBT) had capability to sense Cu2 + ion selectively over other examined competitive cations in the range of 0.1 mu M to 35 mu M with limit of detection 1.45 mu M. This detection limit is lower than concentration of Cu2 + ion in drinking water (31.5 mu M) as recommended by WHO. Furthermore, the resulting receptor (SBT) + CN- adduct species can additionally be used for the recognition of Cu2 + ion by a colour conversion from colourless to dark blue in semi-aqueous medium.(c) 2022 Published by Elsevier B.V.

Automated summary

A styryl-BODIPY based receptor (SBT) has been synthesized as a colorimetric chemosensor for selective sensing of CN- and Cu2+ ions. The receptor exhibited notable optical color changes in the presence of aqueous solutions of CN- and Cu2+ ions respectively. It showed a linear shift in absorption peak for sensing CN- ions and selective sensing of Cu2+ ions over other competitive cations with detection limits lower than the recommended concentration of Cu2+ in drinking water.