An Jing, Yuan Bizhen, Lv Xiaodan, Li Hui, Fang Qianrong
School of Life Sciences, Zhuhai College of Science and Technology, Zhuhai, 519040, P. R. China.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012, P. R. China.
Macromol Rapid Commun. 2025 Aug;46(15):e2500092. doi: 10.1002/marc.202500092. Epub 2025 Apr 7.
The leakage of iodine and its radioactive isotopes poses a major threat to ecosystems and human health, emphasizing the need for effective and recyclable iodine capture materials. Covalent organic frameworks (COFs), characterized by high surface areas, tunable pore sizes, and excellent chemical stability, are ideal candidates for adsorption applications. Herein, two novel COFs (JUC-700 and JUC-701) are designed and synthesized based on benzotrithiophene (BTT). Both JUC-700 and JUC-701 exhibit high surface areas (2004.9 and 1990.5 m g, respectively), mesoporous structures (≈2.6 nm), and abundant heteroatoms, contributing to their exceptional iodine capture performance. Notably, JUC-701 demonstrates superior adsorption capacity (6.17 g g) compared to JUC-700 (4.73 g g), attributes to the enhanced iodine affinity near its pyridine groups. Theoretical calculations further reveal that the pyridinic nitrogen in JUC-701 significantly strengthens interactions with iodine molecules, confirming its superior capture capabilities. This study provides insights into the design of functionalized COFs for iodine capture, contributing to advanced materials for environmental remediation and nuclear waste management.
碘及其放射性同位素的泄漏对生态系统和人类健康构成重大威胁，这凸显了对有效且可回收碘捕获材料的需求。共价有机框架（COFs）具有高比表面积、可调孔径和出色的化学稳定性，是吸附应用的理想候选材料。在此，基于苯并三噻吩（BTT）设计并合成了两种新型COFs（JUC - 700和JUC - 701）。JUC - 700和JUC - 701均具有高比表面积（分别为2004.9和1990.5 m²/g）、介孔结构（≈2.6 nm）以及丰富的杂原子，这使得它们具有出色的碘捕获性能。值得注意的是，与JUC - 700（4.73 g/g）相比，JUC - 701表现出更高的吸附容量（6.17 g/g），这归因于其吡啶基团附近碘亲和力的增强。理论计算进一步表明，JUC - 701中的吡啶氮显著增强了与碘分子的相互作用，证实了其卓越的捕获能力。本研究为设计用于碘捕获的功能化COFs提供了见解，有助于开发用于环境修复和核废料管理的先进材料。
