Department of Chemistry, University of Missouri-Columbia, 601 S College Ave, Columbia, MO, 65211, USA.
Fundamental and Computational Science Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
Angew Chem Int Ed Engl. 2016 Mar 24;55(14):4523-6. doi: 10.1002/anie.201600658. Epub 2016 Mar 1.
Considering the rapidly rising CO2 level, there is a constant need for versatile materials which can selectively adsorb CO2 at low cost. The quest for efficient sorptive materials is still on since the practical applications of conventional porous materials possess certain limitations. In that context, we designed, synthesized, and characterized two novel supramolecular organic frameworks based on C-pentylpyrogallol[4]arene (PgC5 ) with spacer molecules, such as 4,4'-bipyridine (bpy). Highly optimized and symmetric intermolecular hydrogen-bonding interactions between the main building blocks and comparatively weak van der Waals interactions between solvent molecules and PgC5 leads to the formation of robust extended frameworks, which withstand solvent evacuation from the crystal lattice. The evacuated framework shows excellent affinity for carbon dioxide over nitrogen and adsorbs ca. 3 wt % of CO2 at ambient temperature and pressure.
考虑到不断上升的二氧化碳水平，我们迫切需要能够以低成本选择性吸附二氧化碳的多功能材料。由于传统多孔材料的实际应用存在一定的局限性，因此高效吸附材料的研究仍在继续。在这种情况下，我们设计、合成并表征了两种新型超分子有机骨架，它们基于 C-戊基没食子酸[4]芳烃（PgC5）和间隔分子，如 4,4'-联吡啶（bpy）。主构筑块之间高度优化和对称的分子间氢键相互作用以及溶剂分子与 PgC5 之间相对较弱的范德华相互作用导致了稳定的扩展骨架的形成，这种骨架能够承受从晶格中除去溶剂。除去溶剂的骨架对二氧化碳具有优异的亲和性，在环境温度和压力下可吸附约 3wt%的二氧化碳。
