Zhang Yuwei, Wei Dongxue, Zhang Wenzhuo, Zhao Yanning, Luo Xiaolong, Li He
Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China.
Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, China.
Macromol Rapid Commun. 2025 Jan;46(2):e2400673. doi: 10.1002/marc.202400673. Epub 2024 Sep 28.
2D covalent organic frameworks (COFs) are attractive for fluorescence sensing due to their lightweight, robust, and highly ordered porous structures. However, the highly conjugated structures between adjacent layers of covalent organic frameworks can often result in aggregation-caused quenching (ACQ) properties. Here, the study designs two flexible hydrazone-linked COFs to suppress ACQ effects, thereby enhancing their luminescent activities. Furthermore, the high density of nitrogen and oxygen atoms on these flexible walls serves as binding sites for hydrogen bonding interactions, indicating sensitivity and selectivity towards 2,4,6-trinitrophenol detection.
二维共价有机框架（COF）由于其轻质、坚固且高度有序的多孔结构，在荧光传感方面具有吸引力。然而，共价有机框架相邻层之间的高度共轭结构常常会导致聚集诱导猝灭（ACQ）特性。在此，该研究设计了两种柔性腙连接的COF以抑制ACQ效应，从而增强其发光活性。此外，这些柔性壁上高密度的氮和氧原子作为氢键相互作用的结合位点，表明对2,4,6-三硝基苯酚检测具有灵敏度和选择性。
