期刊
MATTER
卷 2, 期 2, 页码 495-506出版社
CELL PRESS
DOI: 10.1016/j.matt.2019.12.029
关键词
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资金
- Ministry of Science & Technology of China [2017YFA0206900]
- National Science Foundation of China [21390404, 21372232]
- Strategic Priority Research Program of the Chinese Academy of Science [XDB17000000]
- Key Research Program of Frontier Sciences [QYZDY-SSW-JSC029]
- Beijing Natural Science Foundation [2172019]
Highly crystalline and emissive carbon dots (CDs) are firstly synthesized via an ionothermal method in organic solvents. In contrast to well-established approaches, ZnCl2 is utilized as the pyrolysis-promoting agent to prepare emissive CDs with tunable wavelengths, directly by carbonization from different O and N precursors under a mild reaction condition at 210 degrees C. More than 50% synthetic yield and 39% photoluminescent quantum yield (blue CD) are obtained. XAFS measurements, in conjunction with TEM, HAADF-STEM, UPS, and ESR analyses, allow us to obtain energy diagram configuration and confirm the luminescent nature of these hard-core structured CDs. Importantly, the resulting CDs exhibit excellent capability to photogenerate superoxide radical anion (O-2(center dot-)), which can be exemplified by both photodynamic therapy and photooxidative cyclization synthesis of tetrahydroquinolines. Representative pharmaceutical mifepristone can be derivatized in 90% yield within 10 min of irradiation of the CDs in an elegant flow reactor.
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