Gu Jiangjiang, Li Xinle, Hu Donghua, Liu Yanfeng, Zhang Guiyang, Jia Xudong, Huang Wenyu, Xi Kai
Department of Polymer Science & Engineering, Nanjing University Nanjing 210093 PR China
Department of Chemistry, Iowa State University Ames Iowa 50011 USA
RSC Adv. 2018 Apr 3;8(23):12556-12561. doi: 10.1039/c8ra01085d.
Carbon dots (CDs) have sparked tremendous attention due to their unique properties and vast potential in diverse fields. Herein, we report a green and cost-effective hydrothermal route for the synthesis of a series of CDs from readily available organics solvents. Since the organics were completely recyclable after the separation of CDs, this method holds immense potential for the large-scale synthesis of CDs. We found the DMF-CDs and DMAc-CDs possessed amphiphilicity and the diameter of amphiphilic DMF-CDs was 3.5 nm with a narrow distribution. Moreover, these amphiphilic CDs emitted blue light under UV irradiation (365 nm) and the quantum yield could reach more than 30%. Due to their good solubility in organic solvent, DMF-CDs were successfully imbedded into polymers (, PS and PMMA), which revealed their potential in painting, coating, and optical devices. In addition, benefiting from high quantum yield and low cytotoxicity, the DMF-CDs in aqueous media were used as fluorescent probes in living cells, which demonstrated their great potential in bio-imaging.
碳点（CDs）因其独特的性质和在不同领域的巨大潜力而引起了极大关注。在此，我们报道了一种绿色且经济高效的水热法，可从易得的有机溶剂合成一系列碳点。由于在碳点分离后有机物可完全回收，该方法在碳点的大规模合成方面具有巨大潜力。我们发现N,N - 二甲基甲酰胺 - 碳点（DMF - CDs）和N,N - 二甲基乙酰胺 - 碳点（DMAc - CDs）具有两亲性，两亲性DMF - CDs的直径为3.5纳米，分布狭窄。此外，这些两亲性碳点在紫外光（365纳米）照射下发出蓝光，量子产率可达30%以上。由于它们在有机溶剂中具有良好的溶解性，DMF - CDs成功地嵌入到聚合物（聚苯乙烯和聚甲基丙烯酸甲酯）中，这揭示了它们在涂料、涂层和光学器件方面的潜力。此外，得益于高量子产率和低细胞毒性，水相介质中的DMF - CDs被用作活细胞中的荧光探针，这证明了它们在生物成像方面的巨大潜力。
