Ardila-Suárez Carolina, Molina V Daniel R, Alem Halima, Baldovino-Medrano Víctor G, Ramírez-Caballero Gustavo E
Grupo de Investigación en Polímeros, Universidad Industrial de Santander, 681011, Colombia.
Phys Chem Chem Phys. 2020 Jun 14;22(22):12591-12604. doi: 10.1039/d0cp00287a. Epub 2020 May 27.
Ordered materials with interconnected porosity allow the diffusion of molecules within their inner porous structure to access the active sites located in the microporous core. As a follow-up of our work on engineering of MOF-808, in this contribution, we study the synthesis of defective MOF-808 using two different strategies: the use of modulators and the surfactant-assisted synthesis to obtain materials with ordered and interconnected pores. The results of the study indicated that (i) the use of modulators of different chain length led to the formation of microporous/mesoporous MOFs through the formation of missing linker defects. However, the use of the acetic acid contributes to the formation of MOFs with larger mesoporous size distributions compared to materials synthesized with formic and propionic acids as modulators, and (ii) the self-assembly of CTAB surfactant produced an ordered microporous/macroporous network which enhanced crystallinity. However, the surface properties of the materials seem to be unaffected by the use of surfactants during synthesis. These results contribute to the development of ordered materials with a broad range of pore size distributions and give rise to new opportunities to extend the applications of MOF-808.
具有相互连通孔隙的有序材料能够使分子在其内部多孔结构中扩散，从而进入位于微孔核心的活性位点。作为我们在MOF-808工程方面工作的后续，在本论文中，我们研究了使用两种不同策略合成缺陷型MOF-808：使用调节剂和表面活性剂辅助合成，以获得具有有序且相互连通孔隙的材料。研究结果表明：（i）使用不同链长的调节剂通过形成缺失连接体缺陷导致微孔/介孔MOF的形成。然而，与使用甲酸和丙酸作为调节剂合成的材料相比，使用乙酸有助于形成具有更大介孔尺寸分布的MOF；（ii）CTAB表面活性剂的自组装产生了有序的微孔/大孔网络，增强了结晶度。然而，材料的表面性质似乎不受合成过程中使用表面活性剂的影响。这些结果有助于开发具有广泛孔径分布的有序材料，并为扩展MOF-808的应用带来新的机遇。
