Mesoporous Metal-Organic Frameworks with Size-tunable Cages: Selective CO_2 Uptake, Encapsulation of Ln~(3+) Cations for Luminescence, and Column-Chromatographic Dye Separation

摘要

Emerging as a new class of porous materials in the last two decades, metal-organic frameworks (MOFs) have been met with great interest owing to their tunable structures and porosities and a wide range of potential applications as functional materials. A key feature in MOFs is the porosity, which plays a crucial role in the functional properties, typically in gas/liquid sorption and separation and transport of catalytic substrates/ products. The MOFs with tunable pore sizes ranging from non-pores to mesopores are regarded to bridge the gap between zeolites and mesoporous silica. In recent years much effort has been dedicated to develop MOFs with large and tunable pores, and there are a few mesoporous MOFs reported with various synthetic strategies. Increasing the length of bridging lig-ands has been adopted as a main strategy, but reduced porosity imposed by interpenetration is nevertheless almost unavoidable.