Hierarchical Engineering of Single-Crystalline Mesoporous Metal–Organic Frameworks with Hollow Structures

• DOI: 10.1021/jacs.5c01415
• Publication Date: 2025-04-21T13:34:46Z
• Authors: Zirui Lv; Minchao Liu; Yi Yang; Tianhao Chen; Wenyu Yang; Yijin Wang; Zaiwang Zhao; Kun Lan; Tiancong Zhao; Qiaowei Li; Xiaomin Li; Dongyuan Zhao

Although the superiority of hierarchical structure has driven extensive demand for applications, establishing hierarchy in a long-range-ordered single crystal remains formidable challenge due to inherent competition and contradiction between crystallinity controllable structure. Herein, we demonstrate growth dissociation kinetics cooperative strategy synthesizing family hollow single-crystalline mesoporous metal-organic frameworks (meso-MOFs) with structures. The approach employs dual-template method, integrating both hard soft templates. By adjusting HCl/CH3COOH ratio, reaction system's pH can be tuned regulate acid-sensitive seeds serving as templates formation structure, while simultaneously modifying concentration dual acids control meso-MOF shells. maintaining achieving well-defined effectively balanced. Driven by two interfacial kinetics, successfully obtained octahedral nanoparticles that not only exhibit precisely size (∼81-1120 nm) tunable wall thickness (∼28.6-61.3 but also retain their single-crystal integrity. Specifically, governed structures, shells ensured uniform coverage structural Based on this strategy, further developed series novel meso-MOFs nanostructures, including open-capsule meso-MOFs, 2D interlayer-structured macro-meso-micro trimodal porous MOFs, so on.