Zhang Yu, Yang Fulin, Liu Can, Hou Defa, Zheng Yunwu, Gao Hui, Sun Hao, Lin Xu
National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forestry Resources, Southwest Forestry University, 300 Bailong Road, Kunming 650224, Yunnan Province, China.
Yunnan University of Chinese Medicine, 1076, Yuhua Road, University City of Chenggong, 650500 Kunming, Yunnan Province, China.
Inorg Chem. 2024 Oct 21;63(42):19827-19834. doi: 10.1021/acs.inorgchem.4c03150. Epub 2024 Oct 10.
Herein, we developed red solid-state fluorescent carbon dots (SSF-CDs) through a one-step solvothermal method, utilizing acetone as the carbonization solvent. Optical and structural characterization revealed that the sp domains in the core of the R-CDs were consistently interrupted and that the oxygen-containing groups on the surface were replaced by alkyl groups. This substitution mitigates excessive π-π interactions, thereby preventing quenching of fluorescence in the solid state. Adjusting the molar ratio of citric acid (CA) and urea yielded solid fluorescent carbon dots (CDs) with panchromatic luminescence, indicating enhanced π-π interactions and more pronounced red shifts in the emission peaks. Furthermore, we found that this strategy is applicable to other carbon sources, including phenylenediamine, salicylic acid, and lignin. This research presents an innovative strategy for the fabrication of solid-state luminescent CDs.
在此，我们通过一步溶剂热法，以丙酮作为碳化溶剂，制备了红色固态荧光碳点（SSF-CDs）。光学和结构表征表明，R-CDs核心中的sp域持续中断，且表面的含氧基团被烷基取代。这种取代减轻了过度的π-π相互作用，从而防止了固态荧光的猝灭。调整柠檬酸（CA）和尿素的摩尔比可得到具有全色发光的固态荧光碳点（CDs），这表明π-π相互作用增强，发射峰出现更明显的红移。此外，我们发现该策略适用于其他碳源，包括苯二胺、水杨酸和木质素。本研究提出了一种制备固态发光CDs的创新策略。
