Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
Analyst. 2019 Aug 7;144(15):4569-4574. doi: 10.1039/c9an00672a. Epub 2019 Jun 21.
A high quantum yield (QY) is the key requirement for implementing carbon dots (CDs) in nearly all applications. In this work, blue emissive N-doped CDs with a QY of 83% and orange emissive N-doped CDs with a QY of 47% were successfully prepared using resorcinol and phloroglucin as carbon resources in formamide by one-step microwave synthesis, respectively. Formamide not only plays a role as the solvent but also takes part in the formation of the high QY CDs. It is demonstrated that the as-prepared blue- and orange-emitting N-doped CDs with a high QY can be uniformly dispersed into glue and be fabricated as CD/glue fluorescent composites for fluorescent films and fingerprint imaging. Furthermore, these CDs also show excellent cellular imaging capability.
高量子产率（QY）是将碳点（CDs）应用于几乎所有领域的关键要求。在这项工作中，分别使用均苯三酚和间苯三酚作为碳源，在甲酰胺中通过一步微波合成，成功制备了QY 为 83%的蓝色发射 N 掺杂 CDs 和 QY 为 47%的橙色发射 N 掺杂 CDs。甲酰胺不仅起到溶剂的作用，而且还参与高 QY CDs 的形成。实验证明，所制备的具有高 QY 的蓝色和橙色发射 N 掺杂 CDs 可以均匀分散在胶水中，并制成 CD/胶荧光复合材料，用于荧光膜和指纹成像。此外，这些 CDs 还表现出优异的细胞成像能力。
