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Exclusive fluoride ion recognition and fluorescence "turn-on" response with a label-free DMN Schiff base
Masood Ayoub Kaloo1, Jeyaraman Sankar
1Department of Chemistry, Indian Institute of Science Education and Research Bhopal, ITI Gas Rahat Building, Govindpura, Bhopal, 462023, India.
Abstract:
A label-free DMN Schiff base (4) has been explored as a highly selective and sensitive fluoride ion receptor. Fluoride-induced deprotonation results in a charge transfer (CT) transition red shifted with a fluorescence 'turn-on'. Anion selectivity can be tuned by the electron push-pull property of substituents at the phenyl para-position. Selectivity for F(-) is attributed to the suitable acidity of -NH2.
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