Tuning the Gate Opening Pressure of Metal-Organic Frameworks (MOFs) for the Selective Separation of Hydrocarbons
Tuning the Gate Opening Pressure of Metal-Organic Frameworks (MOFs) for the Selective Separation of Hydrocarbons
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DOI：
10.1021/ja305754f
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发表时间：
2012-09-19
影响因子：
15
通讯作者：
Chabal, Yves J.
中科院分区：
文献类型：
--
作者：
Nijem, Nour;Wu, Haohan;Chabal, Yves J.
碳氢化合物的分离是最耗能的过程之一。因此，开发在合理条件下选择性吸附碳氢化合物的材料至关重要。这项工作根据闸门开启压力的差异，揭示了柔性金属有机框架（MOF）中意想不到的碳氢化合物选择性。我们显示了选择性依赖于链长和特定的骨架-气体相互作用。通过结合拉曼光谱和理论范德华密度泛函 (vdW-DF) 计算，揭示了控制这种意外的开门行为的分离机制。
Separation of hydrocarbons is one of the most energy demanding processes. The need to develop materials for the selective adsorption of hydrocarbons, under reasonable conditions, is therefore of paramount importance. This work unveils unexpected hydrocarbon selectivity in a flexible Metal-Organic Framework (MOF), based on differences in their gate opening pressure. We show selectivity dependence on both chain length and specific framework-gas interaction. By combining Raman spectroscopy and theoretical van der Waals Density Functional (vdW-DF) calculations, the separation mechanisms governing this unexpected gate-opening behavior are revealed.