Unusual pressure-temperature dependency in the capillary liquid chromatographic separation of C8 alkylaromatics on the MIL-53(Al) metal-organic framework
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- 作者：Wim De Malsche ; Stijn Van der Perre ; Sabrina Silverans ; Michael Maes ; Dirk E. De Vos ; Frederic Lynen ; Joeri F.M. Denayer
- 关键词：Metal&ndash ; organic framework ; MIL-53(Al) ; Capillary liquid chromatography ; Framework breathing ; Xylene isomers
- 刊名：Microporous and Mesoporous Materials
- 出版年：2012
- 出版时间：1 November, 2012
- 年：2012
- 卷：162
- 期：Complete
- 页码：1-5
- 全文大小：370 K
文摘
The propagation of C8 alkylaromatics (in particular ethylbenzene (EB), p-xylene (pX) and o-xylene (oX)) through MIL-53(Al) packed capillaries at varying temperatures (from 20 to 70 ¡ãC) and mobile phase compositions of acetonitrile/1-propanol (75/25, 50/50 and 25/75) has produced unexpected trends in retention behavior and pressure drop; these effects are attributed to framework breathing. Thereby, it seems feasible to perform these chromatographic separations on MIL-53(Al) at elevated temperatures, resulting in much smaller analysis times without losing too much selectivity.