期刊
ANALYTICAL CHEMISTRY
卷 86, 期 15, 页码 7224-7228出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac502405p
关键词
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资金
- National Basic Research Program of China (973 Program) [2011CB933600]
- 111 Project [111-2-10]
Recently, research on carbon nanodots (C-dots), a new type of luminescent nanopartides with superior optical properties, biocompatibility, and low cost, has been focused on exploring novel properties and structure-related mechanisms to extend their scope. Herein, electrochemiluminescence, a surface-sensitive tool, is used to probe the unrevealed property of carbon nanodots which is characterized by surface oxygen-containing groups. Together with chemiluminescence, carbon nanodots as the coreactants for the anodic electrochemiluminescence of Ru(bpy)(3)(2+) are demonstrated for the first time. During the anodic scan, the benzylic alcohol units on the C-dots surface are oxidized homogeneously by electrogenerated-Ru(bpy)(3)(3+) to form reductive radical intermediate, which further reduce Ru(bpy)(3)(3+) into Ru(bpy)(3)(2+*) that produces a strong ECL emission. This work has provided an insight into the ECL mechanism of the C-dots-involved system, which will be beneficial for in-depth understanding of some peculiar phenomena of C-dots, such as photocatalytic activity and redox properties. Moreover, because of the features of C-dots, the ECL system of Ru(bpy)(3)(2+)/C-dots is more promising in the bioanalysis.
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