Tuning the Gate Opening Pressure of Metal鈥揙rganic Frameworks (MOFs) for the Selective Separation of Hydrocarbons
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- 作者：Nour Nijem ; Haohan Wu ; Pieremanuele Canepa ; Anne Marti ; Kenneth J. Balkus ; Jr. ; Timo Thonhauser ; Jing Li ; Yves J. Chabal
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：September 19, 2012
- 年：2012
- 卷：134
- 期：37
- 页码：15201-15204
- 全文大小：280K
- 年卷期：v.134,no.37(September 19, 2012)
- ISSN：1520-5126
文摘
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鈥揙rganic Framework (MOF), based on differences in their gate opening pressure. We show selectivity dependence on both chain length and specific framework鈥揼as 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.