Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
Small Methods. 2023 Jun;7(6):e2201586. doi: 10.1002/smtd.202201586. Epub 2023 Feb 19.
The structural control of metal-organic frameworks (MOFs) is essential for the development of superlative MOFs because the structural features of MOFs and their components play a critical role in determining their properties, and ultimately, their applications. The best components to endow the desired properties for MOFs are available via the appropriate choice from many existing chemicals or synthesizing new ones. However, to date, considerably less information exists regarding fine-tuning the MOF structures. Herein, a strategy for tuning MOF structures by merging two MOF structures into a single MOF, is demonstrated. Depending on the incorporated amounts and relative contributions of the two coexisting organic linkers, benzene-1,4-dicarboxylate (BDC ) and naphthalene-1,4-dicarboxylate (NDC ), which have conflicting spatial-arrangement preferences within an MOF structure, MOFs are rationally designed to have a Kagomé or rhombic lattice. In particular, MOFs with rhombic lattices are constructed to have specific lattice angles by compromising the optimal structural arrangements between the two mixed linkers. The relative contributions of the two linkers during MOF construction determine the final MOF structures, and the competitive influence between BDC and NDC is effectively regulated to produce specific MOF structures with controlled lattices.
金属-有机骨架（MOFs）的结构控制对于开发卓越的 MOFs 至关重要，因为 MOFs 的结构特征及其组件在确定其性质方面起着至关重要的作用，而这些性质最终又决定了它们的应用。通过从许多现有化学物质中进行适当选择或合成新物质，可以获得赋予 MOFs 所需性质的最佳组件。然而，迄今为止，有关精细调整 MOF 结构的信息仍然较少。本文展示了一种通过将两种 MOF 结构合并为单个 MOF 来调整 MOF 结构的策略。根据共存的两种有机连接体苯-1,4-二羧酸（BDC）和萘-1,4-二羧酸（NDC）的掺入量和相对贡献，这两种连接体在 MOF 结构内具有相互冲突的空间排列偏好，合理设计 MOFs 以具有 Kagomé 或菱形晶格。特别是，通过在两种混合连接体之间的最佳结构排列之间进行妥协，构建具有菱形晶格的 MOFs 以具有特定的晶格角。在 MOF 构建过程中两种连接体的相对贡献决定了最终的 MOF 结构，并且可以有效地调节 BDC 和 NDC 之间的竞争影响，以产生具有受控晶格的特定 MOF 结构。
