Metal–organic frameworks (MOFs) commonly have uniform micropores (pore dimension < 2 nm), which may restrict their practical applications involving large molecules. Although quite a little approaches have been developed to prepare mesoporous metal–organic frameworks (meso‐MOFs), challenge remains in the preparation of meso‐MOFs with controllable/tunable porosity. Here we developed a reliable method to rationally design and synthesize meso‐Cu‐BTC materials through utilizing a novel amphiphilic surfactant as the template. X‐ray diffraction, nitrogen adsorption isotherms and pore size distributions were applied to characterize the attained meso‐MOF products, the characterization analyses indicated that the as‐synthesized products possess multimodal pore size distribution with micropores and well‐ordered mesopores. Moreover, the porosity properties of the meso‐Cu‐BTC could be systematically controlled by varying the ratio of H₂O/EtOH, the amount and type of the template. Owing to the well‐order mesoporous structure, the meso‐Cu‐BTC exhibited high uptake capacity of 152 cm³⋅g⁻¹, about 20% higher as compared with conventional counterpart (128 cm³⋅g⁻¹) for the capture of toluene. This work provides a new strategy to prepare meso‐MOFs with tunable porosity that would fulfill a wide range of applications involving large molecules.

中文翻译：

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具有增强的甲苯吸附能力的中孔金属有机骨架的软模板合成

金属有机骨架（MOF）通常具有均匀的微孔（孔径<2 nm），这可能会限制其涉及大分子的实际应用。尽管已经开发了很多方法来制备介孔金属有机骨架（介孔MOF），但是在制备具有可控/可调孔隙率的介孔MOF方面仍然存在挑战。在这里，我们开发了一种可靠的方法，以新型两亲表面活性剂为模板合理设计和合成介孔Cu-BTC材料。利用X射线衍射，氮吸附等温线和孔径分布来表征获得的中观MOF产物，表征分析表明合成后的产物具有多峰孔径分布，具有微孔和有序的中孔。而且，₂ O / EtOH，模板的数量和类型。由于良好的顺序介孔结构，内消旋-铜- BTC表现出152厘米高的吸收容量³ ⋅g ^-1，约20％更高的与常规的对应进行比较（128厘米³ ⋅g ^-1用于捕获）甲苯。这项工作为制备具有可调孔隙率的中型MOF提供了一种新策略，该MOF可以满足涉及大分子的广泛应用。