Polyoxometalate-based metal-organic frameworks (POM@MOFs) integrating the merits of POM and MOF are widely used as catalysts. However, the microporous MOF supports often cause accessibility and mass transportation limitations. Assembling hierarchical POM@MOF facilely to improve the accessibility of catalytic POM centers inside remains challenging. Herein, we fabricate the hierarchical POM@MOF cuboctahedrons with ordered layered surface and mesopores by solvent-assisted assembly, and propose a fractal growth mechanism, which may be extended to other systems.
Zhang, Z., Liu, Y. W., Tian, H. R., Li, X. H., Liu, S. M., Lu, Y., … Liu, S. X. (2020). Polyoxometalate-Based Metal-Organic Framework Fractal Crystals. Matter, 2(1), 250–260. https://doi.org/10.1016/j.matt.2019.09.021