Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, China.
Shanghai Key Laboratory of High-resolution Electron Microscopy & School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.
Angew Chem Int Ed Engl. 2023 May 22;62(22):e202302645. doi: 10.1002/anie.202302645. Epub 2023 Apr 25.
As an emerging class of promising porous materials, the development of two-dimensional conductive metal organic frameworks (2D c-MOFs) is hampered by the few categories and tedious synthesis of the specific ligands. Herein, we developed a nonplanar hexahydroxyl-functionalized Salphen ligand (6OH-Salphen) through a facile two-step synthesis, which was further applied to construct layered 2D c-MOFs through in situ one pot synthesis based on the synergistic metal binding effect of the N O pocket of Salphen. Interestingly, the C -symmetry of ligand endows Cu-Salphen-MOF with periodically heterogeneous pore structures. Benefitting from the higher metal density and shorter in-plane metal-metal distance, Cu-Salphen-MOF showcased excellent NO sensing performance with good sensitivity, selectivity and reversibility. The current work opens up a new avenue to construct 2D c-MOF directly from nonplanar ligands, which greatly simplifies the synthesis and provides new possibilities for preparing different topological 2D c-MOF based functional materials.
作为一类新兴的有前途的多孔材料，二维导电金属有机骨架（2D c-MOFs）的发展受到特定配体种类有限和合成繁琐的限制。在此，我们通过简便的两步合成法开发了一种非平面六羟基功能化 Salphen 配体（6OH-Salphen），该配体进一步通过基于 Salphen 的 N O 口袋的协同金属结合作用的原位一锅合成法，用于构建层状 2D c-MOFs。有趣的是，配体的 C 对称性赋予了 Cu-Salphen-MOF 周期性的不均匀孔结构。得益于更高的金属密度和更短的面内金属-金属距离，Cu-Salphen-MOF 表现出优异的 NO 传感性能，具有良好的灵敏度、选择性和可逆性。这项工作为直接从非平面配体构建 2D c-MOF 开辟了一条新途径，大大简化了合成过程，并为制备不同拓扑结构的 2D c-MOF 基功能材料提供了新的可能性。
