Li Xinghao, Lin Xiang, Feng Zhenzhen, Chen Feng, Huang Qihang, Zheng Linlin, Wu Hongwei, Yuan Jiayin, Liao Yaozu, Zhang Weiyi
State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.
College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China.
Nat Commun. 2025 Aug 11;16(1):7393. doi: 10.1038/s41467-025-62246-3.
Encapsulation of polymer chains into nanochannels of metal-organic frameworks (MOFs) to construct polymer-MOF hybrid materials can retain the desired properties of two disparate materials. However, the facile fabrication of such hybrids remains challenging, given the difficulty in unraveling entanglement of polymer chains and constraining them into ordered conformations. Herein, we introduce an in situ molecular weaving strategy to construct ionic polymer-MOF hybrid materials, employing shear forces and coordination interactions to untangle cationic polymer chains and guide their realignment within MOF nanochannels during framework formation. Notably, this realignment promotes uniform polymer distribution and exposes more anion-exchange sites. The resulting hybrids capture ReO (a nonradioactive surrogate of TcO) with a capacity of 438 mg g and reach adsorption equilibrium within 20 min. Characterization and theoretical calculations reveal that the hydrophobic pores in the hybrid materials confer strong affinity toward less hydrated TcO anions, thereby enhancing their selectivity over competing anions.
将聚合物链封装到金属有机框架（MOF）的纳米通道中以构建聚合物-MOF杂化材料，可以保留两种不同材料的所需特性。然而，鉴于解开聚合物链的缠结并将它们约束成有序构象存在困难，这种杂化材料的简便制备仍然具有挑战性。在此，我们引入一种原位分子编织策略来构建离子聚合物-MOF杂化材料，利用剪切力和配位相互作用来解开阳离子聚合物链，并在框架形成过程中引导它们在MOF纳米通道内重新排列。值得注意的是，这种重新排列促进了聚合物的均匀分布并暴露出更多的阴离子交换位点。所得杂化材料对ReO（TcO的非放射性替代物）的捕获容量为438 mg g，并且在20分钟内达到吸附平衡。表征和理论计算表明，杂化材料中的疏水孔对水合程度较低的TcO阴离子具有很强的亲和力，从而增强了它们对竞争性阴离子的选择性。
