Simulating the Structure of Carbon Dots via Crystalline π‐Aggregated Organic Nanodots Prepared by Kinetically Trapped Self‐Assembly

作者：Yang Jianye; Guo Like; Yong Xue; Zhang Tongjin; Wang Boyang; Song Haoqiang; Zhao Yong Sheng; Hou Hongwei; Yang Bai; Ding Jie; Lu Siyu

来源：Angewandte Chemie, 2022, 134(33).

DOI：10.1002/ANGE.202207817

• Crystalline Organic Nanodots
• Kinetically Trapped Self-Assembly
• π-Aggregation Model

This work reports the successful preparation of a new type of crystalline luminescent organic nanodot (<3.5?nm) by kinetically trapped self‐assembly, which is then used as a simplified π‐packing model to simulate the structure of CDs. The precise structure and J‐aggregation‐induced photoluminescence (PL) of the nanodots are revealed by investigating the structural relationship between the nanodots and the corresponding single crystals and their properties. Compared with the single crystals, crystalline organic nanodots show longer PL lifetime, higher PL quantum yield, and narrower PL peak, indicating that they are potential organic quantum nanodots. In addition, the efficient π‐stacking environment in the corresponding single crystals can promote π‐aggregation‐induced PL anisotropy. This work indicates crystalline organic nanodots with precise structures to be potentially useful for understanding the structures of CDs and to be attractive potential luminescent materials.(#br)A new type of crystalline luminescent organic nanodot (<3.5?nm) prepared by kinetically trapped self‐assembly is reported, which is then used as a simplified π‐packing model to simulate the precise structure of CDs. The nanodots appeared to be potential organic quantum nanodots.