| 光谱学与光谱分析 |
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| Precise and Rapid Detection of Glutathione by Using Novel Fluorescent Ag Nanoclusters |
| HUANG Ke-han, QIN Cui-fang, CAO Xiao-dan, YANG Tai-qun, CHEN Yu-ting, ZHANG San-jun, PAN Hai-feng*, XU Jian-hua |
| State Key Laboratory of Precision Spectroscopy，East China Normal University，Shanghai 200062，China |
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Abstract Glutathione (GSH) is an important three-peptide molecule, which has the functions of antioxidation and detoxification, and plays a crucial role in the fields of biology, medicine and food science. It is involved in many important biochemical reactions in cells and body fluid, and the changes of GSH content reflect the specific health problems of human body. Current methods of GSH detection are always complicated, time-consuming and expensive instrument depended, such as surface enhanced Raman spectroscopy (SERS), electrochemical analysis, high performance liquid chromatography (HPLC) and so on. The probe’s photochemical properties can be modified by the reaction between GSH and nanoclusters, which will result in the changes of fluorescence intensity and wavelength. In this paper, a new method to realize precise and rapid GSH detection is developed by using silver na-noclusters as a fluorescent probe, and simultaneously measures the probe’s fluorescence intensity and wavelength. The synthesis of the fluorescence probe reported in this paper possesses the advantages of steps-simple and pollution free, and the GSH detection method has faster response, more accurate measurement and smaller relative error over the traditional methods. The good specificity of GSH detection among other molecules with the similar structure is further proved in control group experiments by comparing the differences of their fluorescence intensities and wavelength. The measurement accuracy is fully assured due to the insensitivity of the probe to a variety of salt ions and amino acids. This technique can be further employed in the intracellular detection and imaging of GSH.
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Received: 2015-10-27
Accepted: 2016-02-10
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Corresponding Authors:
PAN Hai-feng
E-mail: hfpan@phy.ecnu.edu.cn
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