title: Highly selective fluorescence turn-on sensor for fluoride detection.
abstract: Through click chemistry, triazole and triazolium groups have been explored to recognize anions through C-H···A(-) hydrogen-bonding complexion. Herein, we demonstrate evidence of fluoride-induced deprotonation of a C-H bond and its application in fluoride detection. The combination of fluorene and triazolium units produced a highly selective fluorescence turn-on prototype sensor for fluoride. The interactions between the C-H bond and F(-) were studied by fluorescence spectroscopy and (1)H NMR titrations. Test papers were prepared to detect fluoride in aqueous media at concentrations down to 1.9 ppm, important for estimating whether the fluoride concentration in drinking water is at a safe level.
authors.affiliation: Department of Chemistry, University of Central Florida, Orlando, Florida 32816, USA.
authors.forename: Binglin
authors.initials: B
authors.lastname: Sui
authors.forename: Bosung
authors.initials: B
authors.lastname: Kim
authors.forename: Yuanwei
authors.initials: Y
authors.lastname: Zhang
authors.forename: Andrew
authors.initials: A
authors.lastname: Frazer
authors.forename: Kevin D
authors.initials: KD
authors.lastname: Belfield