title: A turn-on fluorescence probe for the selective and sensitive detection of fluoride ions.
abstract: The sensitive and selective determination of fluoride ions is particularly significant in environmental protection, food safety, and health care products. In this work, a highly selective turn-on fluorescent probe for fluoride ions has been synthesized by simply functionalizing fluorescent isophthalaldehyde with silicone-oxygen bonding. The selectivity of the probe is based on the specific reactivity of the silyl group toward fluoride ions in aqueous solution. The nucleophilic substitution reaction of fluoride ions triggers the cleavage of the Si-O bond to release a strongly fluorescent product, which can be used for the determination of fluoride ions by fluorescence intensity enhancement. The probe molecules are specifically responsive and highly selective for the fluoride anion over other relevant anions and cations. This fluorescent probe also shows high photostability and exhibits good sensitivity for fluoride ions, and the limit of detection is as low as 67 ppb. We have demonstrated its application for on-site sensitive determination of fluoride ions for environmental monitoring and protection.
authors.affiliation: School of Environment and Chemical Engineering, North China Electric Power University, Beijing, 102206, China.|Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui, 230031, China.
authors.forename: Shan
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui, 230031, China.
authors.forename: Mingtai
authors.initials: M
authors.lastname: Sun
authors.affiliation: Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui, 230031, China.
authors.forename: Yehan
authors.initials: Y
authors.lastname: Yan
authors.affiliation: Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui, 230031, China.
authors.forename: Huan
authors.initials: H
authors.lastname: Yu
authors.affiliation: State Key Laboratory of NBC Protection for China, Research Institute of NBC Defense, Beijing, 102205, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Yu
authors.affiliation: State Key Laboratory of NBC Protection for China, Research Institute of NBC Defense, Beijing, 102205, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Jiang
authors.affiliation: Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui, 230031, China. kzhang@iim.ac.cn.
authors.forename: Kui
authors.initials: K
authors.lastname: Zhang
authors.affiliation: School of Environment and Chemical Engineering, North China Electric Power University, Beijing, 102206, China. wangsuhua@ncepu.edu.cn.|Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui, 230031, China. wangsuhua@ncepu.edu.cn.
authors.forename: Suhua
authors.initials: S
authors.lastname: Wang
keywords: Detection; Fluorescence; Fluoride ion; Probe; Turn-on