A unique dual sensor for the detection of DCNP (nerve agent mimic) and Cd2+ in water
DCNP (nerve gas Tabun mimic) and Cd2+ both are extremely toxic to mankind.We have focused our research on quantitative estimation of DCNP and Cd2+ in given water samples. A carbazole-pyrrole conjugate CPC has been designed and synthesized which possesses a unique characteristic feature of detecting two hazardous analytes DCNP and Cd2+ by giving two different optical response i.e. visual color changes and fluorescence “turn-on” respectively. The PET based chemosensor CPC produces a new compound CPC-1 and a highly fluorescent CPC-Cd2+ complex upon addition of DCNP and Cd2+, respectively. The detection limit of CPC for DCNP and Cd2+ has been estimated 7.75 nM and 0.26 µM, respectively at pH 7.0. Quantum chemical calculations have been executed to demonstrate the electronic properties and the mechanism of the receptor-donor interactions. The concentrations of DCNP and Cd2+ ion in various water samples have been estimated with the help of standard absorbance and fluorescence curves.