A Microporous Porphyrin-Based Hydrogen-Bonded Organic Framework for Gas Separation

A hydrogen-bonded organic framework (HOF), HOF-7, based on a zinc porphyrin-based building block (ZnTDPP) with diaminotriazine moieties has been successfully constructed and structurally characterized (ZnTDPP = 5,10,15,20-tetrakis(4-(2,4-diaminotriazinyl)phenyl)porphyrinato zinc). Single-crystal X-ray diffraction analysis reveals that HOF-7 is built by the 2D layered subunits connected by the intermolecular hydrogen-bonding and π–π interaction, exhibiting two kinds of micropores with sizes of 3.2 × 4.7 Å2 and 4.2 × 6.7 Å2, respectively. This HOF exhibits permanent porosities as demonstrated in the CO2 sorption and selective adsorption of CO2 over N2.