کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1254220 | 971359 | 2014 | 4 صفحه PDF | دانلود رایگان |
A simple and selective method for the determination of silver ions was developed by utilizing the red-shift in emission wavelength of the core–shell CdSe/CdS quantum dots (QDs) functionalized with rhodanine upon the addition of Ag+. A linear relationship was observed between the shift and the increase in concentration of Ag+ in the range of 0.0125–12.5 μmol/L. The mechanism of the red-shift was investigated and suggested that the coordination between Ag+ and rhodanine on the QDs surface caused an increase of particle size, which resulted in the red-shift of the QDs’ emission wavelength. A detection limit of 2 nmol/L was achieved. The developed method showed superior selectivity and was successfully applied to the determination of silver in environmental samples.
Determination of Ag+ was accomplished based on the red-shift of emission wavelength of quantum dots functionalized with rhodanine upon the addition of Ag+. A linear relationship was observed between the shift and the concentration of Ag+ added.Figure optionsDownload as PowerPoint slide
Journal: Chinese Chemical Letters - Volume 25, Issue 2, February 2014, Pages 261–264