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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.
Yang et al. (Fri,) studied this question.