Carbon dots based on glutathione for Detections of Mercury ions

• 1、College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China

Abstract：Herein, a facile and economical one-step approach for synthesizing high quantum-yield carbon dots has been well established, while glutathione (GSH) serving as precursors. Specifically, the synthesized carbon dots described here were uniform in size, and exhibited bright blue fluorescence together with excitation-independent emission behavior. Subsequently, the introduction of mercury ions rather than other metal ions obviously lead to the fluorescence quenching of carbon dots. Therefore, it can be used as a fluorescent probe for selectively assaying mercury ions. Under the optimized conditions, the relative fluorescence intensity of carbon dots and the concentration of mercury ions showed a satisfactory linear relationship with a satisfactory correlation coefficient and a detection limit of 3.3×10-9mol/L, suggesting the practicability of this proposed method. Finally, a fast, novel method for assaying mercury ions has been well established in this study.

Keywords： Pharmaceutical Analysis Carbon dots Mercury ions