Journal
MATERIALS ADVANCES
Volume 1, Issue 9, Pages 3176-3181Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ma00106f
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Funding
- Natural Science Foundation of Jiangsu Province [BK20170118]
- Natural Science Foundation of Jiangsu Province-Outstanding Youth Foundation [BK20170104]
- Six Talent Peaks Project in Jiangsu Province [XCL-037]
- Strategic Pioneer Program on Space Science, Chinese Academy of Sciences [XDA15013100, XDA15013101]
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For the sake of good performance in nonlinear optical (NLO) applications, two S,N-codoped carbon quantum dots (CQDs) were synthesized from 3,7-dinitro-10H-phenothiazine under different conditions of alkaline solution (D-1 from NaOH, D-2 from ammonia). The synthesized carbon quantum dots D-1 and D-2 are monodisperse with narrow size distribution (average 2.8 and 3.1 nm). These CQDs exhibit strong pi-pi* transition in the UV region and broad intramolecular charge transfer ((ICT)-I-1) transition absorption bands in the visible region. The PL properties of CQDs are excitation and pH dependent. In addition, the PL intensity of the CQDs remains stable under high ionic strength and 100 W UV light irradiation. Moreover, D-1 and D-2 exhibit delightful NLO response and OPL performance at 532 nm and 1000 nm laser pulses, and the results further elucidate that these CQDs are promising nonlinear optical materials for optical power limiting applications.
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