Synthesis of Carbon Dots and their Application as Turn Off–On Fluorescent Sensor for Mercury (II) and Glutathione
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In this paper, we present a new method for the detection of mercury (II) and glutathione using carbon dots as fluorescent sensor. The synthesized carbon dots have the advantages of simple manipulation, low cost and the high fluorescence quantum yield of them which was22.79%. The combination of mercury (II) and carbon dots caused the turn off of carbon dots fluorescence. With the reaction between mercury (II) and glutathione, the carbon dots were released and the fluorescence was turned on when the glutathione added. According to this, the carbon dots could be developed to detect mercury (II) and glutathione specifically, and the detection limit of mercury (II) is as low as 0.41 μM.
KeywordsCarbon dots Fluorescence Hg2+sensing Glutathione sensing
This work is financed by the National Natural Science Foundation of China-Union Foundation of Henan (U1704170), Key Programs of Henan for Science and Technology Development (182102310103 and 182102310848) and Key Scientific Research Project of Henan Ministry of Education (20A610005).
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