Synthesis and properties of organic microporous polymers from the monomer of hexaphenylbenzene based triptycene

•Hexaphenylbenzene based triptycenes were used as monomer to synthesize HTPs.•Two low-cost Friedel-Crafts and Scholl reactions were used to synthesize HTPs.•HTP-B displays high CO2 uptake capacity of 10.3 wt %.

An expanded triptycene (hexaphenylbenzene based triptycene) monomer was synthesized from triiodotriptycene. Using this monomer, two kinds of organic microporous polymers HTPs (HTP-A and HTP-B) were prepared by Friedel-Crafts and Scholl reactions. Their structure and properties were characterized by FT-IR, solid 13C NMR, powder XRD, SEM, TEM and gas absorption. Nitrogen sorption analysis displayed that the BET surface areas are 569 and 914 m2 g−1 for HTP-A and HTP-B, respectively. For HTP-B, they can reversibly absorb 1.09 wt % H2 (1.0 bar and 77 K) and 10.3 wt% CO2 (1.0 bar and 273 K), respectively.

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