title: Fluorescence 'on-off-on' chemosensor for sequential recognition of Fe(3+) and Hg(2+) in water based on tetraphenylethylene motif.
abstract: A novel selective and sensitive fluorescence 'on-off-on' probe based on tetraphenylethylene (TPE) motif for sequential recognition of Fe(3+) and Hg(2+) in water has been developed. Especially the complex 6-Fe(3+) could behave as a 'turn on' fluorescent sensor over a wide-range pH value for detection of Hg(2+). The selectivity of this complex for Hg(2+) over other heavy and transition metal ions is excellent, and its sensitivity for Hg(2+) is at 2 ppb in water.
authors.affiliation: Laboratory of Pharmaceutical Design & Synthesis, College of Sciences, Northwest A&F University, Yangling 712100, Shannxi Province, PR China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Yan
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Che
authors.forename: Xiang
authors.initials: X
authors.lastname: Yu
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zhi
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Wang
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
mesh_terms: D005030:Ethylenes / Q000138:chemical synthesis / Q000737:chemistry*; D005290:Ferric Compounds / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008628:Mercury / Q000032:analysis*; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry*
chemical_list: D005030:Ethylenes; D005290:Ferric Compounds; D005456:Fluorescent Dyes; D007477:Ions; D014867:Water; C036216:ethylene; D008628:Mercury