A New Fluorescence Sensor for Cerium (III) Ion Using Glycine Dithiocarbamate Capped Manganese Doped ZnS Quantum Dots

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• 作者：Mohammad Kazem Rofouei ; Narjes Tajarrod ; Majid Masteri-Farahani…
• 关键词：Cerium (III) sensor ; Fluorescence quenching ; Nanosensor ; Quantum dots ; Glycine dithiocarbamate
• 刊名：Journal of Fluorescence
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：25
• 期：6
• 页码：1855-1866
• 全文大小：2,444 KB
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• 作者单位：Mohammad Kazem Rofouei (1)
  Narjes Tajarrod (1)
  Majid Masteri-Farahani (1)
  Reza Zadmard (2)
  
  1. Faculty of Chemistry, Kharazmi University, Tehran, Iran
  2. Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biomedicine
  Biomedicine
  Biophysics and Biomedical Physics
  Biotechnology
  Biochemistry
  Analytical Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1573-4994

文摘

A new fluorescence sensor for Ce3+ions is reported in this paper. This sensor is based on the fluorescence quenching of glycine dithiocarbamate (GDTC)-functionalized manganese doped ZnS quantum dots (QDs) in the presence of Ce3+ions. The synthesis of ultra-small GDTC-Mn:ZnS quantum dots (QDs) is based on the co-precipitation of nanoparticles in aqueous Solution. The nanoparticles are characterized with fluorescence spectroscopy, UV–vis absorption spectra, high-resolution transmission electron microscopy, X-ray power diffraction (XRD), and infrared spectroscopy. In the test carried out, it was found that the interaction between Ce3+ions and GDTC capped Mn:ZnS QDs quenches the original fluorescence of QDs according to the Stern-Volmer equation and the results show the existence of collisional quenching process. A linear relationship was observed between the extent of quenching and the concentration of Ce3+in the range of 2.0?×-0? to 3.2?×-0? mol.L?, with a detection limit of 2.29?×-0? mol.L?. The relative standard deviation of 1.61 % was obtained for five replicate measurements. The possible quenching mechanism was also examined by fluorescence and UV–vis absorption spectra. The interference of other cations was negligible on the quantitative determination of Ce3+. This method proved to be simple, sensitive, low cost, and also reliable for practical applications. Keywords Cerium (III) sensor Fluorescence quenching Nanosensor Quantum dots Glycine dithiocarbamate