Tuning the Functional Groups on Carbon Nanodots and Antioxidant Studies

被引：76

作者：

Ji, Zuowei ^{[1
]}

Sheardy, Alex ^{[1
]}

Zeng, Zheng ^{[1
]}

Zhang, Wendi ^{[1
]}

Chevva, Harish ^{[1
]}

Allado, Kokougan ^{[1
]}

Yin, Ziyu ^{[1
]}

Wei, Jianjun ^{[1
]}

机构：

[1] Univ North Carolina Greensboro, Dept Nanosci, Joint Sch Nanosci & Nanoengn, Greensboro, NC 27401 USA

来源：

MOLECULES | 2019年 / 24卷 / 01期

基金：

美国国家科学基金会;

关键词：

carbon nanodots; functional groups; antioxidation; radical scavenging; electro-chemistry; charge transfer; ONE-STEP SYNTHESIS; QUANTUM DOTS; GREEN SYNTHESIS; HYDROTHERMAL CARBONIZATION; DPPH ASSAY; NANOPARTICLES; OXYGEN; WATER; 2,2-DIPHENYL-1-PICRYLHYDRAZYL; FLUORESCENCE;

D O I：

10.3390/molecules24010152

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Carbon nanodots (CNDs) have shown good antioxidant capabilities by scavenging oxidant free radicals such as diphenyl-1-picrylhydrazyl radical (DPPH center dot) and reactive oxygen species. While some studies suggest that the antioxidation activities associate to the proton donor role of surface active groups like carboxyl groups (-COOH), it is unclear how exactly the extent of oxidant scavenging potential and its related mechanisms are influenced by functional groups on CNDs' surfaces. In this work, carboxyl and the amino functional groups on CNDs' surfaces are modified to investigate the individual influence of intermolecular interactions with DPPH center dot free radical by UV-Vis spectroscopy and electrochemistry. The results suggest that both the carboxyl and the amino groups contribute to the antioxidation activity of CNDs through either a direct or indirect hydrogen atom transfer reaction with DPPH center dot.

引用

页数：12

共 54 条

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