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Herein, we develop two novel 2-hydroxyarylimidazoles as colorimetric and ratiometric sensors for the naked-eye detection of fluoride anion. We conclude the proton-transfer mechanism for fluoride detection from the absorption, fluorescence and 1H NMR titration studies. Generally the proton transfer based probes have poor selectivity over various anions particularly for fluoride and acetate and thus most of the reports described sensing of fluoride over other halogen anions only. But we could successfully demonstrated selectivity after variation of structure and solvent mixture (acetonitrile/methanol) which establish the importance of such design. Moreover, the molecules exhibit unique optical properties with colorimetric and ratiometric response for fluoride.
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This page is a summary of: 2-Hydroxyarylimidazole-based colorimetric and ratiometric fluoride ion sensors, RSC Advances, October 2014, Royal Society of Chemistry,
DOI: 10.1039/c4ra10482j.
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