A new turn-off fluorescence probe based on graphene quantum dots for detection of Au(III) ion

作者：Amjadi Mohammad^*; Shokri Roghayeh; Hallaj Tooba

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2016, 153: 619-624.

DOI：10.1016/j.saa.2015.09.037

• Graphene quantum dots
• Fluorescence quenching
• Gold ions

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 mu M, with a detection limit of 0.5 mu M. The developed method was applied to the determination of Au(III) in water and plasma samples with satisfactory results.

• 出版日期2016-1-15