An Ionothermal Synthetic Approach to Porous Polyoxometalate-Based Metal-Organic Frameworks

摘要

Porous materials with regular, bulky, accessible cages and channels have aroused great research interest owing to their potential applications in gas storage, separation, ion-exchange, and heterogeneous catalysis. Polyoxometalates (POMs), as a unique class of metal oxide clusters, constitute promising building units for targeting multifunctional materials because of their nanosize, adjustable compositions, abundant topologies, and their oxygen-rich surface with strong coordination abilities. Despite the unparalleled success in the preparation of microporous/mesoporous compounds by covalently linking simple metal ions and organic ligands, attempts to prepare porous POM-based metal-organic frameworks have met with only limited success. Therefore, the synthesis of such frameworks is one of the most challenging issues in synthetic chemistry.