Reticular Chemistry in Action: A Hydrolytically Stable MOF Capturing Twice Its Weight in Adsorbed Water
Reticular Chemistry in Action: A Hydrolytically Stable MOF Capturing Twice Its Weight in Adsorbed Water
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DOI：
10.1016/j.chempr.2017.11.005
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发表时间：
2018-01-11
期刊：
影响因子：
23.5
通讯作者：
Eddaoudi, Mohamed
中科院分区：
文献类型：
--
作者：
Abtab, Sk Md Towsif;Alezi, Dalal;Eddaoudi, Mohamed
具有显著吸水性的水解稳定的吸附剂是最重要的，并且为许多与水吸附相关的应用提供了巨大的潜力。然而，具有高孔隙率和高稳定性的可调多孔固体的故意构造仍然具有挑战性。在这里，我们提出了网状化学的成功部署，以满足这一需求：我们构建了Cr-SiO2-MOF-1，一种化学和水解稳定的铬基金属有机框架（MOF），具有潜在的金属拓扑结构。突出地，Cr-SiO2-M0 F-1提供了所需的热稳定性和化学稳定性，同时具有独特的吸附性能，即非常高的孔隙率（表观表面积为4，549 m2/g），在70%相对湿度下提供了1.95g/g的水蒸气吸收。这种特殊的吸水率在超过100个吸附-解吸循环中保持不变。明显地，仅通过简单地降低25 ℃下的相对湿度就可以使吸附的水完全解吸。Cr-SiO2-MOF-1在封闭和受限空间和通风系统中的水蒸气控制应用中具有很大的潜力。
Hydrolytically stable adsorbents, with notable water uptake, are of prime importance and offer great potential for many water-adsorption-related applications. Nevertheless, deliberate construction of tunable porous solids with high porosity and high stability remains challenging. Here, we present the successful deployment of reticular chemistry to address this demand: we constructed Cr-soc-MOF-1, a chemically and hydrolytically stable chromium-based metal-organic framework (MOF) with underlying soc topology. Prominently, Cr-soc-MOF-1 offers the requisite thermal and chemical stability concomitant with unique adsorption properties, namely extraordinary high porosity (apparent surface area of 4,549 m(2)/g) affording a water vapor uptake of 1.95 g/g at 70% relative humidity. This exceptional water uptake is maintained over more than 100 adsorption-desorption cycles. Markedly, the adsorbed water can be fully desorbed by just the simple reduction of the relative humidity at 25 degrees C. Cr-soc-MOF-1 offers great potential for use in applications pertaining to water vapor control in enclosed and confined spaces and dehumidification.