title: Fluorescence enhancement of CdTe/CdS quantum dots by coupling of glyphosate and its application for sensitive detection of copper ion.
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.
authors.affiliation: Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, PR China.
authors.forename: Zhengqing
authors.initials: Z
authors.lastname: Liu
authors.forename: Shaopu
authors.initials: S
authors.lastname: Liu
authors.forename: Pengfei
authors.initials: P
authors.lastname: Yin
authors.forename: Youqiu
authors.initials: Y
authors.lastname: He
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D003300:Copper / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D005998:Glycine / Q000031:analogs & derivatives* / Q000737:chemistry; D007477:Ions / Q000032:analysis; D057230:Limit of Detection; D046529:Microscopy, Electron, Transmission; D015336:Molecular Probe Techniques; D045663:Quantum Dots; D012680:Sensitivity and Specificity; D013440:Sulfides / Q000737:chemistry; D013691:Tellurium / Q000737:chemistry; D013864:Thioglycolates / Q000737:chemistry; D062065:Wastewater / Q000737:chemistry; D000097797:Glyphosate
chemical_list: D019187:Cadmium Compounds; D003300:Copper; D005456:Fluorescent Dyes; D005998:Glycine; D007477:Ions; D013440:Sulfides; D013691:Tellurium; D013864:Thioglycolates; D062065:Wastewater; D000097797:Glyphosate; C034939:cadmium sulfide; C017487:2-mercaptoacetate