利用石墨烯量子点的“开启”荧光检测汞（II）和硫氰酸根。
Detecting Mercury (II) and Thiocyanate Using "Turn-on" Fluorescence of Graphene Quantum Dots.
机构信息
Department of Physics, University of Zabol, P. O. Box. 98613-35856, Zabol, Iran.
Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON, N9B 3P4, Canada.
出版信息
J Fluoresc. 2020 Sep;30(5):1181-1187. doi: 10.1007/s10895-020-02586-z. Epub 2020 Jul 20.
In this work, 1.8 nm graphene quantum dots (GQDs), exhibiting bright blue fluorescence, were prepared using a bottom-up synthesis from citric acid. The fluorescence of the GQDs could be almost completely quenched (about 96%) by adding Hg. Quenching was far less efficient with other similar heavy metals, Tl, Pb and Bi. Fluorescence could be near quantitatively restored through the introduction of thiocyanate. This "turn-on" fluorescence can thus be used to detect both or either environmental and physiological contaminants mercury and thiocyanate and could prove useful for the development of simple point-of-care diagnostics in the future. Graphical Abstract.
在这项工作中，使用柠檬酸的自下而上合成法制备了具有明亮蓝光荧光的 1.8nm 石墨烯量子点（GQDs）。添加汞可使 GQDs 的荧光几乎完全猝灭（约 96%）。其他类似重金属 Tl、Pb 和 Bi 的猝灭效率要低得多。通过引入硫氰酸盐，荧光可以近乎定量地恢复。因此，这种“开启”荧光可以用来检测环境和生理污染物汞和硫氰酸盐，这可能有助于未来开发简单的即时诊断方法。图摘要。
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