A coumarin-based fluorescent chemosensor for Zn2+ in aqueous ethanol media.
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.
Su
Zhuan
Z
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry, Northwest University, Xi'an, 710069, China.
Chen
Kangyu
K
Guo
Yuan
Y
Qi
Haiping
H
Yang
Xiao-Feng
XF
Zhao
Minglei
M
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
D003374:Coumarins; D014867:Water; D000431:Ethanol; C030123:coumarin; D015032:Zinc