title: Highly selective "turn-on" fluorescent sensing of fluoride ion based on a conjugated polymer thin film-Fe3+complex.
abstract: We designed a new fluorescent conjugated polymer thin film sensor via direct electropolymerization of the corresponding electroactive monomer M onto the surface of ITO electrode, and the thin film-Fe3+complex was used for the highly-selective detection of fluoride ion (F-) in water environmental samples. The as-obtained thin film could effectively detect Fe3+as a selective turn-off fluorescent sensor, and exhibited outstanding reversibility. This film in the presence of Fe3+showed a highly selective turn-on response toward F-over other anions with a 5-fold enhancement in the fluorescence intensity. F-with a relatively wide concentration range from 10 μM to 3 mM could be determined in a rather simple and sensitive manner with a detection limit of 6.78 μM (0.128 ppm). Analytical applicability of the film-Fe3+complex for determining the levels of F-in environmental water samples has been successfully demonstrated by fluorescent analysis with satisfactory results. This strategy will provide a new approach for the facile design of new molecular sensing devices and practical application in environments.
authors.affiliation: Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology, Normal University, Nanchang 330013, PR China; Key Laboratory of Applied Chemistry, Jiangxi Agricultural University, Nanchang 330045, PR China.
authors.forename: Wanchuan
authors.initials: W
authors.lastname: Ding
authors.affiliation: Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology, Normal University, Nanchang 330013, PR China. Electronic address: xujingkun@tsinghua.org.cn.
authors.forename: Jingkun
authors.initials: J
authors.lastname: Xu
authors.affiliation: Key Laboratory of Applied Chemistry, Jiangxi Agricultural University, Nanchang 330045, PR China. Electronic address: wenyangping1980@gmail.com.
authors.forename: Yangping
authors.initials: Y
authors.lastname: Wen
authors.affiliation: Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology, Normal University, Nanchang 330013, PR China; Key Laboratory of Applied Chemistry, Jiangxi Agricultural University, Nanchang 330045, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology, Normal University, Nanchang 330013, PR China.
authors.forename: Hongtao
authors.initials: H
authors.lastname: Liu
authors.affiliation: Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology, Normal University, Nanchang 330013, PR China; Key Laboratory of Applied Chemistry, Jiangxi Agricultural University, Nanchang 330045, PR China.
authors.forename: Zhouxiang
authors.initials: Z
authors.lastname: Zhang
keywords: Conjugated polymers; Electropolymerization; Film-Fe(3+) complex; Fluoride ion