CO2 capture enhancement in MOFs via the confinement of molecules,Reaction Chemistry & Engineering

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CO2 capture enhancement in MOFs via the confinement of molecules
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2021-1-4 , DOI: 10.1039/d0re00410c
Vanesa del C. Cotlame-Salinas _{1,

2,

3,

4} , Alfredo López-Olvera _{4,

5,

6,

7,

8} , Alejandro Islas-Jácome _{1,

2,

3,

4} , Eduardo González-Zamora _{1,

2,

3,

4} , Ilich A. Ibarra _{4,

5,

6,

7,

8}

Affiliation

Metal–organic frameworks (MOFs) have become the most promising molecular sponges to capture gases contributing to the greenhouse effect, e.g. CO₂, due to various desirable features such as tuneable pore shapes, sizes and functionalities, a great surface area, resistance to harsh conditions (wide ranges of pH, temperatures, humidity, etc.), ease of their preparation, and in most cases, a high degree of recovery. Thus, despite many MOFs adsorbing extensive amounts of CO₂ in their pristine form, it has been demonstrated that their uptake capability can be considerably enhanced when they are post-synthetically modified by the confinement of molecules with different polarities, as a result of new physical–chemical interactions between the pre-confined species and the CO₂ molecules within their cavities, for example, via the bottleneck effect, H-bonds and/or even π–π stacking interactions. Thus, this review covers selected studies, mainly from the last five years, highlighting the most significant advances on the CO₂ enhanced uptake performance of selected MOFs with pre-adsorbed polar (water, alcohols, and amines) and non-polar (toluene and benzene) molecules, as well as some interesting findings from robust computational calculations behind understanding the nature of such host–guest interactions, with the latter one being a practical and useful tool in the research field.

中文翻译：

通过限制分子在MOF中捕获二氧化碳

金属有机骨架（MOF）已成为最有希望的分子海绵，用于捕获对温室效应有贡献的气体，例如CO ₂，这归因于各种理想的特征，例如可调节的孔形状，尺寸和功能，较大的表面积，耐苛刻性条件（pH，温度，湿度等较宽的范围），易于制备以及在大多数情况下具有较高的回收率。因此，尽管许多MOF吸附了大量的CO ₂以原始的形式，已经证明，由于预先限定的物种和分子之间新的物理化学相互作用，通过限制极性不同的分子对它们进行合成后修饰，可以大大提高它们的吸收能力。例如，通过瓶颈效应，氢键和/或什至π–π堆积相互作用，腔内的CO ₂分子。因此，本综述涵盖了主要来自过去五年的精选研究，着重介绍了CO ₂的最重要进展。通过预先吸附的极性（水，醇和胺）和非极性（甲苯和苯）分子增强了选定MOF的吸收性能，以及从强大的计算计算中获得的一些有趣发现，这些计算背后的理解是主客体相互作用的本质，后者在研究领域是一种实用且有用的工具。

更新日期：2021-02-03

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