title: Magnetically recoverable fluorescence chemosensor for the adsorption and selective detection of Hg2+ in water.
abstract: In order to conveniently and effectively detect the heavy metal ion Hg(2+) existing in water, a magnetic fluorescence chemosensor has been strategically prepared by immobilizing a Rhodamine B derivative RhB-tris(2-aminoethyl)amine on Fe3O4@SiO2-Au@PSiO2 composites via gold particles. The adsorption and detection for Hg(2+) ions were investigated with fluorophotometry. This chemosensor shows high sensitivity and high selectivity for Hg(2+) over other metal cations owing to the ring opening of the rhodamine fluorophore selectively induced by Hg(2+). In addition, the presence of Fe3O4 in the sensor also facilitates the magnetic separation of the Fe3O4@SiO2-Au-Hg(2+)@PSiO2 from the solution.
authors.affiliation: State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China. liganghg@dlut.edu.cn.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Lv
authors.forename: Gang
authors.initials: G
authors.lastname: Li
authors.forename: Zhuhong
authors.initials: Z
authors.lastname: Cheng
authors.forename: Hong
authors.initials: H
authors.lastname: Lu
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Gao
mesh_terms: D000327:Adsorption; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D005456:Fluorescent Dyes / Q000032:analysis; D008628:Mercury / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D005456:Fluorescent Dyes; D014874:Water Pollutants, Chemical; D008628:Mercury