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Triptycene-Based Microporous Polymer Incorporating Thioamide Functionality: Preparation and Gas Storage Properties
* 1, 2 , 3 , 4
1  China Center for Modernization Research, Chinese Academy of Sciences
2  University of Chinese Academy of Sciences
3  Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore
4  Institute of Materials Research and Engineering, Agency for Science , Technology and Research (A*STAR), Singapore

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.
Keywords: hydrogen storage; microporous polymer ; post-modification ; thioamide ; triptycene