复旦大学李晓民团队报道了均匀单晶介孔金属有机框架。相关研究成果于2025年1月6日发表在《自然—化学》。

介孔金属-有机框架（meso-MOFs）的合成是重要的，因为这些材料可用于各种应用。然而，由于微观尺度（MOF结晶）和介观尺度（胶束与MOF亚基的组装）的结构张力不平衡，单晶介观MOF的形成具有挑战性。

该文中，研究人员报告了通过强酸和弱酸共同介导的协同组装方法，在具有确定排列的微孔框架中，制备具有有序中孔通道的均匀单晶介观MOF纳米粒子。这些纳米粒子具有截短的八面体形状，具有可变尺寸和明确的二维六边形结构（p6mm）柱状中孔。

值得注意的是，MOFs的结晶动力学和胶束的组装动力学之间的匹配，对于形成单晶介观MOFs至关重要。基于这一策略，研究人员构建了一个具有可调大孔径、可控中间相、各种形态和多元组分的介观MOFs库。

附：英文原文

Title: Uniform single-crystal mesoporous metal–organic frameworks

Author: Lv, Zirui, Lin, Runfeng, Yang, Yi, Lan, Kun, Hung, Chin-Te, Zhang, Pengfei, Wang, Jinxiu, Zhou, Wanhai, Zhao, Zaiwang, Wang, Zhongyao, Zou, Jiawen, Wang, Taoyang, Zhao, Tiancong, Xu, Yifei, Chao, Dongliang, Tan, Weimin, Yan, Bo, Li, Qiaowei, Zhao, Dongyuan, Li, Xiaomin

Issue&Volume: 2025-01-06

Abstract: The synthesis of mesoporous metal–organic frameworks (meso-MOFs) is desirable as these materials can be used in various applications. However, owing to the imbalance in structural tension at the micro-scale (MOF crystallization) and the meso-scales (assembly of micelles with MOF subunits), the formation of single-crystal meso-MOFs is challenging. Here we report the preparation of uniform single-crystal meso-MOF nanoparticles with ordered mesopore channels in microporous frameworks with definite arrangements, through a cooperative assembly method co-mediated by strong and weak acids. These nanoparticles feature a truncated octahedron shape with variable size and well-defined two-dimensional hexagonally structured (p6mm) columnar mesopores. Notably, the match between the crystallization kinetics of MOFs and the assembly kinetics of micelles is critical for forming the single-crystal meso-MOFs. On the basis of this strategy, we have constructed a library of meso-MOFs with tunable large pore sizes, controllable mesophases, various morphologies and multivariate components.

DOI: 10.1038/s41557-024-01693-9

Source: https://www.nature.com/articles/s41557-024-01693-9