title: Highly selective "turn-on" fluorescent and colorimetric sensing of fluoride ion using 2-(2-hydroxyphenyl)-2,3-dihydroquinolin-4(1H)-one based on excited-state proton transfer.
abstract: A simple, highly selective and sensitive colorimetric system for the detection of fluoride ion in an aqueous medium has been developed using 2-(2-hydroxyphenyl)-2,3-dihydroquinolin-4(1H)-one. This system allows selective "turn-on" fluorescence detection of fluoride ion, which is found to be dependent upon guest basicity. An excited-state proton transfer is proposed to be the signaling mechanism, which is rationalized by DFT and TD-DFT calculations. The present sensor can also be applied to detect fluoride levels in real water samples.
authors.affiliation: School of Chemistry, Madurai Kamaraj University, Madurai 625 021 (India), Fax: (+91) 452-2459181, Fax: (+91) 452-2459105.
authors.forename: Kuppusamy
authors.initials: K
authors.lastname: Kanagaraj
authors.forename: Kasi
authors.initials: K
authors.lastname: Pitchumani
mesh_terms: D003124:Colorimetry; D005453:Fluorescence; D005459:Fluorides / Q000032:analysis*; D007477:Ions / Q000032:analysis; D011522:Protons; D011789:Quantum Theory; D015363:Quinolones / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: C000594131:2-(2-hydroxyphenyl)-2,3-dihydroquinolin-4(1H)-one; D007477:Ions; D011522:Protons; D015363:Quinolones; D014874:Water Pollutants, Chemical; D005459:Fluorides
keywords: chemosensors; excited-state proton transfer; fluorescence; fluoride ions; sensors