{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T19:00:53Z","timestamp":1788980453555,"version":"build-2803163510"},"reference-count":50,"publisher":"Wiley","issue":"29","license":[{"start":{"date-parts":[[2025,5,24]],"date-time":"2025-05-24T00:00:00Z","timestamp":1748044800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["22371166"],"award-info":[{"award-number":["22371166"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The efficient separation of acetylene (C<jats:sub>2<\/jats:sub>H<jats:sub>2<\/jats:sub>) from carbon dioxide (CO<jats:sub>2<\/jats:sub>) and ethylene (C<jats:sub>2<\/jats:sub>H<jats:sub>4<\/jats:sub>) is of significant industrial importance but remains highly challenging due to their similar physicochemical properties. In this study, three isostructural metal\u2013organic frameworks, [Co<jats:sub>4<\/jats:sub>(<jats:italic>\u00b5<jats:sub>4<\/jats:sub><\/jats:italic>\u2010SO<jats:sub>4<\/jats:sub>)<jats:sub>2<\/jats:sub>(tpim)<jats:sub>2<\/jats:sub>(L)<jats:sub>2<\/jats:sub>] (tpim = 2,4,5\u2010tri(4\u2010pyridyl)\u2010imidazole, L = dicarboxylate; termed as Co<jats:sub>4<\/jats:sub>\u2010L), are constructed from sulfate\u2010capped Co<jats:sub>4<\/jats:sub> clusters extended by N\u2010rich tpim linkers and different\u2010sized dicarboxylate ligands. Among them, the <jats:bold>Co\u2084\u20101,4\u2010ndc<\/jats:bold> framework, incorporating 1,4\u2010naphthalenedicarboxylic acid (1,4\u2010ndc), offers optimal pore confinement that promotes host\u2013guest interactions between C\u2082H\u2082 molecules and framework. This material exhibits high C\u2082H\u2082 capture capacities of 4.30 and 3.40\u00a0mmol g<jats:sup>\u2212<\/jats:sup>\u00b9 from equimolar C\u2082H\u2082\/CO\u2082 and C\u2082H\u2082\/C\u2082H\u2084 mixtures, respectively. Theoretical simulations reveal that the enhanced selectivity arises from multiple cooperative hydrogen\u2010bonding interactions between C\u2082H\u2082 and the framework <jats:bold>Co\u2084\u20101,4\u2010ndc<\/jats:bold>, generating strong and preferential binding sites. This study highlights the role of pore\u2010environment engineering\u00a0of metal\u2010organic frameworks (MOFs) for selective C\u2082H\u2082 separation, providing a foundation for the development of advanced adsorbents in industrial gas purification.<\/jats:p>","DOI":"10.1002\/smll.202412205","type":"journal-article","created":{"date-parts":[[2025,5,24]],"date-time":"2025-05-24T15:43:09Z","timestamp":1748101389000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Tailoring Pore Environments in Metal\u2013Organic Frameworks for Efficient C<sub>2<\/sub>H<sub>2<\/sub>\/CO<sub>2<\/sub> and C<sub>2<\/sub>H<sub>2<\/sub>\/C<sub>2<\/sub>H<sub>4<\/sub> Separations"],"prefix":"10.1002","volume":"21","author":[{"given":"Lan","family":"Zhou","sequence":"first","affiliation":[{"name":"School of Chemistry and Chemical Engineering Shandong University  Jinan 250100 P. R. 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