401. Fluorescence enhancement of CdTe/CdS quantum dots by coupling of glyphosate and its application for sensitive detection of copper ion.
- Author
-
Liu Z, Liu S, Yin P, and He Y
- Subjects
- Cadmium Compounds chemistry, Fluorescence, Glycine chemistry, Ions analysis, Limit of Detection, Microscopy, Electron, Transmission, Sensitivity and Specificity, Sulfides chemistry, Tellurium chemistry, Thioglycolates chemistry, Wastewater chemistry, Glyphosate, Copper analysis, Environmental Monitoring methods, Fluorescent Dyes chemistry, Glycine analogs & derivatives, Molecular Probe Techniques, Quantum Dots
- Abstract
A novel fluorescent probe for Cu(2+) determination based on the fluorescence quenching of glyphosate (Glyp)-functionalized quantum dots (QDs) was firstly reported. Glyp had been used to modify the surface of QDs to form Glyp-functionalized QDs following the capping of thioglycolic acid on the core-shell CdTe/CdS QDs. Under the optimal conditions, the response was linearly proportional to the concentration of Cu(2+) between 2.4×10(-2)μg mL(-1) and 28μg mL(-1), with a detection limit of 1.3×10(-3)μg mL(-1) (3δ). The Glyp-functionalized QDs fluorescent probe offers good sensitivity and selectivity for detecting Cu(2+). The fluorescent probe was successfully used for the determination of Cu(2+) in environmental samples. The mechanism of reaction was also discussed., (Copyright © 2012 Elsevier B.V. All rights reserved.)
- Published
- 2012
- Full Text
- View/download PDF