title: A coumarin-based fluorescent chemosensor for Zn2+ in aqueous ethanol media.
abstract: A coumarin-based fluorescent chemosensor 1 for Zn(2+) was designed and synthesized. Compound 1 exhibits lower background fluorescence due to intramolecular photoinduced electron transfer. However, upon mixing with Zn(2+) in 30% (v/v) aqueous ethanol, a "turn-on" fluorescence emission is observed. The fluorescence emission increases linearly with Zn(2+) concentration in the range 0.5-10 micromol L(-1) with a detection limit of 0.29 micromol L(-1). No remarkable emission enhancement was, however, observed for other metal ions. The proposed chemosensor was applied to the determination of Zn(2+) in water samples with satisfactory results.
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry, Northwest University, Xi'an, 710069, China.
authors.forename: Zhuan
authors.initials: Z
authors.lastname: Su
authors.forename: Kangyu
authors.initials: K
authors.lastname: Chen
authors.forename: Yuan
authors.initials: Y
authors.lastname: Guo
authors.forename: Haiping
authors.initials: H
authors.lastname: Qi
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Yang
authors.forename: Minglei
authors.initials: M
authors.lastname: Zhao
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D003374:Coumarins / Q000737:chemistry*; D004579:Electron Transport; D000431:Ethanol / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D055668:Photochemical Processes; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry*; D015032:Zinc / Q000032:analysis* / Q000737:chemistry
chemical_list: D003374:Coumarins; D014867:Water; D000431:Ethanol; C030123:coumarin; D015032:Zinc