Wang Boyang, Li Jian, Tang Zhiyong, Yang Bai, Lu Siyu
College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450001, China; CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.
Sci Bull (Beijing). 2019 Sep 15;64(17):1285-1292. doi: 10.1016/j.scib.2019.07.021. Epub 2019 Jul 19.
Near-infrared emissive carbon dots (CDs) were synthesized by hydrothermal method. The as-prepared CDs exhibited a relatively high quantum yield (QY) of 33.96% in an aqueous solution, and the peak toward the near-infrared fluorescence reached 685 nm. The CDs exhibited pH-sensitive characteristics under strong acidic conditions. Even at pH = 0, the as-prepared CDs retained a high fluorescence intensity, which proved that they possessed good acid resistance. More importantly, the CDs were sensitive to the Fe changes in living cells. In addition, they could also be used for white and red emissive LEDs. This discovery will expand the use of aqueous-phase high QY CDs in the field of living cell sensing and imaging.
通过水热法合成了近红外发射碳点（CDs）。所制备的碳点在水溶液中表现出相对较高的量子产率（QY），为33.96%，且近红外荧光峰达到685nm。这些碳点在强酸性条件下表现出pH敏感特性。即使在pH = 0时，所制备的碳点仍保持较高的荧光强度，这证明它们具有良好的耐酸性。更重要的是，这些碳点对活细胞中的铁变化敏感。此外，它们还可用于白色和红色发光二极管。这一发现将扩大水相高量子产率碳点在活细胞传感和成像领域的应用。
