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Rapid Commun."],"published-print":{"date-parts":[[2025,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Selective separation of acetylene (C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>2<\/jats:sub>\n                    ) from carbon dioxide (CO\n                    <jats:sub>2<\/jats:sub>\n                    ) and ethylene (C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    ) mixtures is critical in the petrochemical industry due to their similar size and physicochemical properties. Developing three\u2010dimensional porous covalent organic frameworks (3D COFs) remains challenging in this context. In this work, a non\u2010symmetrical 2\u2010phenyl pyridine based three\u2010dimensional covalent organic framework (\n                    <jats:bold>COF\u2010PPy)<\/jats:bold>\n                    has been synthesized, which features a rare dia\u2010C9 fold interpenetrated structure as suggested by computational simulations.\n                    <jats:bold>COF\u2010PPy<\/jats:bold>\n                    exhibits high acetylene (C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>2<\/jats:sub>\n                    ) adsorption capacity (4.5\u00a0mmol\u00a0g\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 298\u00a0K), as well as excellent separation and purification performance for C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>2<\/jats:sub>\n                    \/CO\n                    <jats:sub>2<\/jats:sub>\n                    and C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>2<\/jats:sub>\n                    \/C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    mixtures. The\n                    <jats:italic>in situ\u2010<\/jats:italic>\n                    FTIR studies suggest that the multi\u2010point interactions between nitrogen centers of\n                    <jats:bold>COF\u2010PPy<\/jats:bold>\n                    and H\u2010C\u2261CH (COF\u2010Pyridine\u2010N\u00b7\u00b7\u00b7H\u2010C\u2261C\u2010H and COF\u2010imine\u2010N\u00b7\u00b7H\u2010C\u2261CH) account for the higher affinities for C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>2<\/jats:sub>\n                    over other gases. Furthermore, dynamic breakthrough studies reveal that\n                    <jats:bold>COF\u2010PPy<\/jats:bold>\n                    can be employed as an effective adsorbent for the efficient separation of C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>2<\/jats:sub>\n                    from CO\n                    <jats:sub>2<\/jats:sub>\n                    and C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    . In addition,\n                    <jats:bold>COF\u2010PPy<\/jats:bold>\n                    exhibits lower heat of adsorption (Q\n                    <jats:sub>st<\/jats:sub>\n                    ) values with high adsorption capacity for C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>2<\/jats:sub>\n                    as compared to previously reported C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>2<\/jats:sub>\n                    \u2010selective adsorbents, indicating less regeneration energy. Our work therefore provides some new avenues for the design and construction of 3D COFs for efficient C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>2<\/jats:sub>\n                    capture and separation.\n                  <\/jats:p>","DOI":"10.1002\/marc.202500317","type":"journal-article","created":{"date-parts":[[2025,7,3]],"date-time":"2025-07-03T00:14:09Z","timestamp":1751501649000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Interpenetrated Three\u2010Dimensional Covalent Organic Framework for Selective Adsorption of C\n                    <sub>2<\/sub>\n                    H\n                    <sub>2<\/sub>\n                    Over CO\n                    <sub>2<\/sub>\n                    and C\n                    <sub>2<\/sub>\n                    H\n                    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