Toward Liquid Phase Processable Metal Organic Frameworks: Dream or Reality?,Accounts of Materials Research

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Toward Liquid Phase Processable Metal Organic Frameworks: Dream or Reality?
Accounts of Materials Research ( IF 14.0 ) Pub Date : 2021-11-11 , DOI: 10.1021/accountsmr.1c00100
Daria Poloneeva ₁ , Shuvo Jit Datta ₂ , Luis Garzon-Tovar ₁ , Sara Durini ₁ , Magnus Rueping ₁ , Mohamed Eddaoudi ₂ , Anastasiya Bavykina ₁ , Jorge Gascon ₁

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Conventionally, the virtue of porosity is only given to porous solids. Metal Organic Frameworks (MOFs), carbon materials, or zeolites are some examples. However, processing these solids is not a straightforward task. Here, we discuss how to endow porous solids (MOFs) with liquid phase processability. More specifically, we show that surface modification of MOF crystals can lead to the formation of porous liquids (PLs) that can be further processed in the liquid phase. For instance, when placed in mesitylene, ZIF-67 predictably sediments. In contrast, with the adequate surface modification, stable dispersion of ZIF-67 can be achieved. Our proposed surface modification is facile and rapid. N-Heterocyclic carbenes are chosen as modifying agents as they are similar to imidazole linkers present on ZIFs. A simple stirring of a MOF and carbene mixture results in a modified solid. The morphology and textural properties of the modified MOF do not change from the ones of its parent. Since the porosity in solution remains unoccupied, the obtained stable colloids behave as porous liquids. Research into porous liquids is an emerging field that has already shown great promise in gases storage. Our breakthrough experiments show that these particular PLs have large potential for the separation of CO₂/CH₄ mixtures.

中文翻译：

迈向可液相加工的金属有机骨架：梦想还是现实？

通常，孔隙率的优点仅适用于多孔固体。金属有机框架 (MOF)、碳材料或沸石是一些例子。然而，处理这些固体并不是一项简单的任务。在这里，我们讨论如何赋予多孔固体 (MOF) 液相加工能力。更具体地说，我们表明 MOF 晶体的表面改性可以导致多孔液体 (PLs) 的形成，可以在液相中进一步加工。例如，当置于均三甲苯中时，ZIF-67 可预见地沉淀。相反，通过适当的表面改性，可以实现 ZIF-67 的稳定分散。我们提出的表面改性简单而快速。选择 N-杂环卡宾作为改性剂，因为它们类似于存在于 ZIF 上的咪唑接头。MOF 和卡宾混合物的简单搅拌产生改性固体。改性 MOF 的形态和纹理特性与其母体的形态和纹理特性没有变化。由于溶液中的孔隙度未被占据，所获得的稳定胶体表现为多孔液体。多孔液体的研究是一个新兴领域，在气体储存方面已经显示出巨大的前景。我们的突破性实验表明，这些特殊的 PL 具有分离 CO 的巨大潜力₂ /CH ₄混合物。

更新日期：2021-12-24

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