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Here, we report that a rationally designed flexible metal\u2013organic framework (FMOF), featuring a specifically engineered microporous environment with bifunctionality, can promote the efficient one\u2010step separation of C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    from a ternary mixture. Adsorption isotherms and dynamic breakthrough tests provide experimental evidence confirming the selective adsorption of 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                    over C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    on such a FMOF, as well as its ability to separate C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    from a CO\n                    <jats:sub>2<\/jats:sub>\n                    \/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                    ternary mixture. Theoretical calculations and simulations provide critical insights into the flexible adsorption process and the separation mechanism of the FMOF. The bifunctionality incorporated in FMOF provides exceptionally strong binding of 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                    but inhibition of C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    , which, in turn, enables high adsorption selectivity for CO\n                    <jats:sub>2<\/jats:sub>\n                    \/C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/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                    . This FMOF has high potential for industrial applications in the separation of C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    from gas mixtures.\n                  <\/jats:p>","DOI":"10.1002\/anie.202508419","type":"journal-article","created":{"date-parts":[[2025,7,8]],"date-time":"2025-07-08T14:06:44Z","timestamp":1751983604000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Engineering the Microporous Environment of Flexible Metal\u2013Organic Frameworks with Bifunctionality for Promoting the Separation of Ethylene from a Ternary Mixture"],"prefix":"10.1002","volume":"64","author":[{"given":"Kang","family":"Wang","sequence":"first","affiliation":[{"name":"School of Chemistry and Chemical Engineering Hefei University of Technology  Hefei 230009 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yao","family":"Jiang","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering Hefei University of Technology  Hefei 230009 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Advanced Papermaking and Paper\u2010based Materials School of Light Industry and Engineering South China University of Technology  Guangzhou 510640 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shaojun","family":"Jia","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering Hefei University of Technology  Hefei 230009 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qi","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering Hefei University of Technology  Hefei 230009 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Cui","sequence":"additional","affiliation":[{"name":"School of Chemistry and Chemical Engineering Hefei University of Technology  Hefei 230009 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thamraa","family":"AlShahrani","sequence":"additional","affiliation":[{"name":"Department of Physics College of Science Princess Nourah bint Abdulrahman University  Riyadh 11564 Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1897-7069","authenticated-orcid":false,"given":"Shengqian","family":"Ma","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of North Texas  Denton 76201 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