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A new quinoline-based fluorescent-colorimetric chemosensor for sensitive and selective "on-off" detection of Pb2+
Vanshika Sharma1, Srishti Dutta1, Devanand Sahu1
1Department of Chemistry, Guru Ghasidas Vishwavidyalaya Bilaspur C.G India patra29in@yahoo.co.in goutam.patra@ggu.ac.in +91 7587312992.
Abstract:
For the first time, a novel mono Schiff base of a quinoline-based reversible fluorescent-colorimetric receptor (L) has been designed for the detection of Pb2+ ions in a semi-aqueous medium. The receptor L exhibited a very good selective fluorescent-colorimetric quick on-off response when exposed to Pb2+. The colorimetric assay showed a sensitivity of 1.2 × 10-6 M, while the fluorescent assay exhibited a sensitivity of 9.9 × 10-7 M for Pb2+. A 1 : 1 stoichiometric complexation between L and Pb2+ was determined using ESI-MS spectra and Job's plot measurements. Pb2+ was successfully measured using receptor L in both real samples and in an aqueous solution of the protein bovine serum albumin, as well as in the construction of an INHIBIT-type molecular logic gate.
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