Abstract
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 m2 g-1 for the parent TMP to 207 m2 g-1 on 74% conversion of nitrile to thioamide, while the resulting micorporous polymer possesses high H2 uptake capacity, reaching 101.1 cm3/g-1 (0.9 wt%) at 1.0 bar and 77 K, especially along with high selectivity towards H2 over CO2, N2 and CH4. The micorporous polymer presents a promising potential as efficient adsorbents in clean energy applications.
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