一种基于石墨烯量子点的用于检测金（III）离子的新型猝灭型荧光探针。
A new turn-off fluorescence probe based on graphene quantum dots for detection of Au(III) ion.
作者信息
Amjadi Mohammad, Shokri Roghayeh, Hallaj Tooba
机构信息
Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 5166616471, Iran.
Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 5166616471, Iran.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jan 15;153:619-24. doi: 10.1016/j.saa.2015.09.037. Epub 2015 Oct 6.
In this work, a new turn-off fluorescence probe based on the graphene quantum dots (GQDs) was designed for detection and quantification of Au(III) ion. GQDs were prepared by two simple carbonization methods using glucose (g-GQDs) and citric acid (c-GQDs) as carbon sources. The effect of some metal ions on the fluorescence intensity of the prepared GQDs was studied. It was found that the fluorescence of both GQDs is significantly quenched by Au(III) ions but the sensitivity and analytical performances are different for two prepared GQDs. Using g-GQDs, a new analytical method was developed for the determination of Au(III) in the concentration range of 1.0-80 μM, with a detection limit of 0.5 μM. The developed method was applied to the determination of Au(III) in water and plasma samples with satisfactory results.
在本工作中，设计了一种基于石墨烯量子点（GQDs）的新型猝灭型荧光探针，用于检测和定量金（III）离子。以葡萄糖（g-GQDs）和柠檬酸（c-GQDs）作为碳源，通过两种简单的碳化方法制备了GQDs。研究了一些金属离子对所制备GQDs荧光强度的影响。发现两种GQDs的荧光均被金（III）离子显著猝灭，但对于两种制备的GQDs，其灵敏度和分析性能有所不同。使用g-GQDs，开发了一种新的分析方法，用于测定浓度范围为1.0 - 80 μM的金（III），检测限为0.5 μM。所开发的方法应用于水和血浆样品中金（III）的测定，结果令人满意。
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