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Green synthesis of amphiphilic carbon dots from organic solvents: application in fluorescent polymer composites and bio-imaging

机译：由有机溶剂绿色合成两亲碳点：在荧光聚合物复合材料和生物成像中的应用

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摘要

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 ca. 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 ( i.e. , 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.
机译：碳点（CD）由于其独特的性能和在各个领域的巨大潜力而​​引起了极大的关注。在本文中，我们报道了一种绿色且经济高效的水热路线，用于从易于获得的有机溶剂中合成一系列CD。由于CD分离后有机物可完全回收，因此该方法具有大规模CD合成的巨大潜力。我们发现DMF-CDs和DMAc-CDs具有两亲性，两亲DMF-CDs的直径约为。 3.5 nm，分布窄。而且，这些两亲CD在紫外线照射下（365 nm）发出蓝光，量子产率可达30％以上。由于它们在有机溶剂中的良好溶解性，成功地将DMF-CD嵌入到聚合物（即PS和PMMA）中，从而揭示了它们在涂漆，涂层和光学设备中的潜力。此外，得益于高量子产率和低细胞毒性，水性介质中的DMF-CD被用作活细胞中的荧光探针，证明了其在生物成像中的巨大潜力。

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