Photoresponsive Type III Porous Liquids.
Photoresponsive Type III Porous Liquids.
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DOI：
10.1002/chem.202202848
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发表时间：
2023-01-18
影响因子：
4.3
通讯作者：
Greenaway, Rebecca L.
中科院分区：
文献类型：
--
作者：
Brand, Michael C.;Rankin, Nicola;Cooper, Andrew I.;Greenaway, Rebecca L.
多孔材料由于在气体吸附和分子分离等领域的潜在应用而成为广泛研究的主题。直到最近，大多数多孔材料都是固体，但现在出现了一类称为多孔液体的材料。在液体中引入固有孔隙率或空腔可以产生自由流动的材料，其能够显著高于常规无孔液体的气体吸收。一些多孔液体也被研究用于气体分离。到目前为止，气体从多孔液体中的释放依赖于分子置换（例如，通过添加小溶剂分子）、压力或温度波动或超声处理。在这里，我们探索了一种新的气体释放方法，其中涉及光致异构化的多孔液体，包括分散在离子液体中的光响应性MOF。这导致CO2相对于CH 4的选择性吸收，并允许通过使用UV光来控制气体释放。 多孔液体通常集中在静态成分上，这些成分需要温度和压力波动或超声处理来从系统中释放气体。在此，报道了一种新的光响应性III型多孔液体，其通过将已知的光响应性金属-有机骨架分散在离子液体中形成，产生能够在用UV光照射时释放气体的多孔液体。
Porous materials are the subject of extensive research because of potential applications in areas such as gas adsorption and molecular separations. Until recently, most porous materials were solids, but there is now an emerging class of materials known as porous liquids. The incorporation of intrinsic porosity or cavities in a liquid can result in free‐flowing materials that are capable of gas uptakes that are significantly higher than conventional non‐porous liquids. A handful of porous liquids have also been investigated for gas separations. Until now, the release of gas from porous liquids has relied on molecular displacement (e.g., by adding small solvent molecules), pressure or temperature swings, or sonication. Here, we explore a new method of gas release which involves photoisomerisable porous liquids comprising a photoresponsive MOF dispersed in an ionic liquid. This results in the selective uptake of CO2 over CH4 and allows gas release to be controlled by using UV light. Porous liquids have typically focused on static components which require temperature and pressure swings, or sonication, to release gas from the system. Here, a new photoresponsive type III porous liquid is reported, formed by dispersing a known photoresponsive metal–organic framework in an ionic liquid, creating a porous liquid capable of releasing gas upon irradiation with UV light.
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