A robust three-dimensional HOF (HOF-15) composed of 7-fold interpenetrated dia topological networks has been fabricated by the self-assembly of 3,3′,5,5′-tetrakis(4-carboxyphenyl)-2,2′,6,6′-tetramethoxy-1,1′-biphenyl by a carboxyl dimeric hydrogen-bonding interaction, exhibiting an exceedingly high BET surface area of 1964 m2 g–1 through supercritical carbon dioxide (sc-CO2) treatment. This value is significantly higher than that (791 m2 g–1) for the solvent-degassed sample, illustrating the important role of the activation mode in the establishment of the permanent porosity of HOFs. Furthermore, C2 and C3 light hydrocarbons have been screened at 298 K to probe their separation potential.
通过羧基二聚氢键相互作用,3,3′,5,5′-四(4-羧基苯基)-2,2′,6,6′-四甲氧基-1,1′-
联苯的自组装形成了一个由7个相互渗透的直径拓扑网络组成的坚固的三维HOF(HOF-15),通过超临界
二氧化碳(sc-
CO2)处理,其BET比表面积高达1964 m2 g–1。该值明显高于溶剂脱气样品的比表面积(791 m2 g–1),这表明活化模式在建立HOF的永久孔隙度方面起着重要作用。此外,在298 K下筛选了C2和C3轻烃,以研究它们的分离潜力。