Triptycene-Based Microporous Polymer Incorporating Thioamide Functionality: Preparation and Gas Storage Properties

Triptycene-based micorporous polymer was functionalized with thioamide moieties via post-polymerization using phosphorus pentasulfide as a thionating agent in the presence of sodium sulfite. Gas adsorption experiments indicate that the modification leads to a reduction in the BET surface area of the polymer, from 1640 m g for the parent TMP to 207 m g on 74% conversion of nitrile to thioamide, while the resulting micorporous polymer possesses high H2 uptake capacity, reaching 101.1 cmg (0.9 wt %) at 1.0 bar and 77 K, along with relatively high selectivity towards CO2 over CH4 and N2. The microporous organic polymer presents a promising potential as efficient adsorbents in clean energy applications.