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Chromogenic Chemosensor for Simultaneous Detection of PO4 3- and CO3 2- Anions in Organo-Aqueous Solutions:
Annasaheb Dhawale1, Darshak R Trivedi1
1Supramolecular Chemistry Laboratory, National Institute of Technology Karnataka (NITK), Surathkal, Karnataka, India, 575025.
Abstract:
Three new chromogenic receptors have been synthesized with the primary objective of facilitating the selective recognition of PO4 3-and CO3 2- ions in an organo-aqueous medium. R1 and R2 exhibit an extraordinary detection limit aligning with both EPA and WHO guidelines. R1 shows LOD of 0.135 ppm for PO4 3- and 0.175 ppm for CO3 2-, while R2 sets forth a LOD of 0.427 ppm for PO4 3- and 0.729 ppm for CO3 2-. The binding mechanism involves intramolecular charge transfer (ICT) band are substantiated by comprehensive studies that include UV-Vis titration, 1H-NMR titration, DFT studies and electrochemical studies. Chemosensors were employed in the formulation of logic gate, the fabrication of a paper strip test kit and its application in RGB color sensor device.
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