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Herein, based on the isoreticular contraction strategy, a novel covalent organic framework (i.e., HFPB\u2010TAB\u2010COF) with\n                    <jats:bold>kgd<\/jats:bold>\n                    topological structure and average pore size of 5.70 \u00c5, between the kinetic diameters of benzene (5.60 \u00c5) and cyclohexane (6.10 \u00c5), is synthesized for benzene\/cyclohexane separation by pore confinement effect. HFPB\u2010TAB\u2010COF has the highest ideal adsorbed solution theory (IAST) selectivity of 36.0 for benzene\/cyclohexane separation, and can produce 0.48\u00a0mmol g\n                    <jats:sup>\u22121<\/jats:sup>\n                    cyclohexane with purity of +99% from 50:50 (v:v) benzene\/cyclohexane mixture under dynamic condition, higher than reported separation materials. Optimizing the pore size of COFs by isoreticular contraction strategy can trigger the pore confinement effect for better meeting the separation challenge in industry.\n                  <\/jats:p>","DOI":"10.1002\/smll.202408742","type":"journal-article","created":{"date-parts":[[2024,11,20]],"date-time":"2024-11-20T05:28:12Z","timestamp":1732080492000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["A Novel kgd\u2010Topological Covalent Organic Framework with Optimum Pore Size for Efficient Benzene\/Cyclohexane Separation"],"prefix":"10.1002","volume":"21","author":[{"given":"Borui","family":"Cai","sequence":"first","affiliation":[{"name":"Department of Environmental Science Zhejiang University  Hangzhou 310058 China"},{"name":"Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control  Hangzhou 310058 China"},{"name":"Key Laboratory of Environmental Pollution and Ecological Health of Ministry of 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