期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 33, 页码 9910-9914出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201705989
关键词
carbon quantum dots; free radicals; hydrothermal treatment; reactive oxygen species; selenium
资金
- National Basic Research Program of China [2013CB834502]
- National Science Foundation for Distinguished Young Scholars [21425416]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21421064]
- Natural Science Foundation of Beijing for Young Scholars [041560241]
- China Postdoctoral Science Foundation [043260277]
Heteroatom doping is an effective way to adjust the fluorescent properties of carbon quantum dots. However, selenium-doped carbon dots have rarely been reported, even though selenium has unique chemical properties such as redox-responsive properties owing to its special electronegativity. Herein, a facile and high-output strategy to fabricate selenium-doped carbon quantum dots (Se-CQDs) with green fluorescence (quantum yield 7.6%) is developed through the hydrothermal treatment of selenocystine under mild conditions. Selenium heteroatoms endow the Se-CQDs with redox-dependent reversible fluorescence. Furthermore, free radicals such as COH can be effectively scavenged by the Se-CQDs. Once Se-CQDs are internalized into cells, harmful high levels of reactive oxygen species (ROS) in the cells are decreased. This property makes the Se-CQDs capable of protecting biosystems from oxidative stress.
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