title: Selective and sensitive fluorescent turn-off chemosensors for Fe3+.
abstract: Two novel chemosensors (2a and 2b) were synthesized by facile condensation of the binding unit (L-histidine) and the fluorophores (anthracene and dansyl groups). Both of them displayed high selectivity and sensitivity towards Fe(3+) over other metal ions in aqueous solution. The sensing mechanism was based on the paramagnetic property of Fe(3+) that would lead to fluorescence quenching of the fluorophores when Fe(3+) was bound to the recognition units. The results showed that l-histidine was a good coordination motif for Fe(3+) and both the anthracene and dansyl groups can sensitively report the sensing information.
authors.affiliation: State Key Laboratory of Virology, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People's Republic of China.
authors.forename: Li
authors.initials: L
authors.lastname: Fu
authors.forename: Jie
authors.initials: J
authors.lastname: Mei
authors.forename: Ji-Tao
authors.initials: JT
authors.lastname: Zhang
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.forename: Feng-Lei
authors.initials: FL
authors.lastname: Jiang
mesh_terms: D000873:Anthracenes / Q000737:chemistry*; D003619:Dansyl Compounds / Q000737:chemistry*; D005290:Ferric Compounds / Q000032:analysis*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D006639:Histidine / Q000737:chemistry*; D015394:Molecular Structure; D013050:Spectrometry, Fluorescence
chemical_list: D000873:Anthracenes; D003619:Dansyl Compounds; D005290:Ferric Compounds; D005456:Fluorescent Dyes; D006639:Histidine; C034020:anthracene