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Determination of silver ion based on the redshift of emission wavelength of quantum dots functionalized with rhodanine

Li Chen ,  Qin Zhao ,  Xiao-Yan Zhang ,  Guan-Hong Tao

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Citation:  Li Chen, Qin Zhao, Xiao-Yan Zhang, Guan-Hong Tao. Determination of silver ion based on the redshift of emission wavelength of quantum dots functionalized with rhodanine[J]. Chinese Chemical Letters, 2014, 25(2): 261-264. shu

Determination of silver ion based on the redshift of emission wavelength of quantum dots functionalized with rhodanine

    • 通讯作者: Guan-Hong Tao,
摘要: A simple and selective method for the determination of silver ions was developed by utilizing the redshift 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. Themechanism 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.

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  • 收稿日期:  2013-08-07
  • 网络出版日期:  2013-09-26
通讯作者: 陈斌, bchen63@163.com
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