title: A highly sensitive fluorescent chemosensor for selective detection of zinc (II) ion based on the oxadiazole derivative.
abstract: A novel fluorescent chemosensor based on the oxadiazole, 2-(2-hydroxyphenyl)-5-(4-methoxyphenyl)-1,3,4-oxadiazole, was designed and synthesized. The interaction of the oxadiazole with different metal ions had been investigated through UV-vis absorption and fluorescence spectra in 9:1 (v/v) ethanol-water (pH=7.0) solution. The oxadiazole showed a pronounced fluorescence enhancement at 430nm upon addition of Zn2+in aqueous solution, whereas it had no apparent interference from other metal ions. The results indicated that the oxadiazole possessed high selectivity and sensitivity to Zn2+ion. The stoichiometric ratio between the oxadiazole and Zn2+ion was calculated to be 2:1 by Job plot experiment, meanwhile their binding modes was confirmed by1H NMR and mass spectrometry. Their association constant was determined to be 1.95×105M-1and the detection limit for Zn2+ion was 6.14×10-7mol/L.
authors.affiliation: College of Chemistry and Chemical Engineering, Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Lin
authors.affiliation: College of Chemistry and Chemical Engineering, Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
authors.affiliation: College of Chemistry and Chemical Engineering, Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, China.
authors.forename: Si-Hong
authors.initials: SH
authors.lastname: Chen
authors.affiliation: College of Chemistry and Chemical Engineering, Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, China. Electronic address: dunjiawang@163.com.
authors.forename: Dun-Jia
authors.initials: DJ
authors.lastname: Wang
authors.affiliation: College of Chemistry and Chemical Engineering, Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, China.
authors.forename: Guo-Dong
authors.initials: GD
authors.lastname: Yin
keywords: Fluorescent sensor; Oxadiazole derivative; Selective; Zinc (II) ion detection