title: A near-Infrared Fluorescent Chemodosimeter for Ratiometric Detecting Fluoride Based on Desilylation Reaction.
abstract: A new chemodosimeter based on dicyanomethylene-4H-chromene chromophore (probe 1) was developed as a ratiometric fluorescent probe in near-infrared range for F(-) with good selectivity in acetonitrile. Probe 1 could be used to directly visualize F(-) by the naked eye and showed more than 621-fold fluorescence enhancement at 715 nm upon reaction with F(-) upon excitation at 625 nm. The recognition of probe 1 to fluoride was featured by F(-)-induced red-shifts of both absorption (185 nm) and fluorescence peaks (132 nm) based on internal charge transfer (ICT) in acetonitrile. The desilylation reaction of 1 by F(-) was proposed for its dual absorption and emission ratiometric detection of fluoride.
authors.affiliation: College of Sciences, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China. phxie2013@163.com.
authors.forename: Puhui
authors.initials: P
authors.lastname: Xie
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China.
authors.forename: Fengqi
authors.initials: F
authors.lastname: Guo
authors.affiliation: College of Sciences, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China.
authors.forename: Guangqin
authors.initials: G
authors.lastname: Gao
authors.affiliation: College of Sciences, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Fan
authors.affiliation: College of Sciences, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China.
authors.forename: Guoyu
authors.initials: G
authors.lastname: Yang
authors.affiliation: College of Sciences, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China.
authors.forename: Lixia
authors.initials: L
authors.lastname: Xie
keywords: Chemodosimeter; Dicyanomethylene-4H-chromene; Fluorescence; F−; Near-infrared; Ratiometric