{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T08:52:07Z","timestamp":1792399927738,"version":"4.4.0"},"reference-count":34,"publisher":"Wiley","issue":"32","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\/501100021171","name":"Basic and Applied Basic Research Foundation of Guangdong Province","doi-asserted-by":"publisher","award":["12105027"],"award-info":[{"award-number":["12105027"]}],"id":[{"id":"10.13039\/501100021171","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Materials"],"published-print":{"date-parts":[[2025,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Hydrogen purification by membrane technology offers a sustainable path to meet the escalating demands of green energy. However, conventional polymeric membranes are constrained by permeability\u2010selectivity trade\u2010off and instability under real\u2010world operating conditions. While covalent organic framework (COF) membranes hold promise, their overlarge pores and poor film\u2010processibility are to be imperatively solved. Herein, a ternary building unit system is designed for synthesizing imine\u2010based COF nanosheets with programmable interlayer offsets. By synergizing a planar aldehyde monomer as the basic structural unit and a none\u2010planar alkyl\u2010functionalized aldehyde monomer as the structure regulation unit, we induce layer distortion that disrupts\n                    <jats:italic>\u03c0\u2013\u03c0<\/jats:italic>\n                    dominated AA stacking, enabling angstrom\u2010precise pore tuning (1.4\u20130.6\u00a0nm) via controlled transitions to AB stacking while retaining crystallinity. The mechanically robust nanosheets are easily assembled into large\u2010area membranes via a facile blade casting, overcoming the processability bottleneck associated with binary building unit systems. The resulting membranes demonstrate an exceptional H\n                    <jats:sub>2<\/jats:sub>\n                    \/CO\n                    <jats:sub>2<\/jats:sub>\n                    selectivity of 60, surpassing existing benchmarks. When treating gas mixtures from methanol steam reforming, a two\u2010stage membrane process achieves 99.5% H\n                    <jats:sub>2<\/jats:sub>\n                    purity and 94.0% recovery. Precise modulation of pore architecture and mechanical flexibility through building units engineered stacking affords a platform for microporous organic membranes.\n                  <\/jats:p>","DOI":"10.1002\/adma.202504622","type":"journal-article","created":{"date-parts":[[2025,5,24]],"date-time":"2025-05-24T15:30:41Z","timestamp":1748100641000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":40,"title":["Building Unit Engineering Toward COF Membranes with Controlled Stacking for H\n                    <sub>2<\/sub>\n                    Purification"],"prefix":"10.1002","volume":"37","author":[{"given":"Xiaohe","family":"Tian","sequence":"first","affiliation":[{"name":"College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haishan","family":"Huan","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keming","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rui","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Longjie","family":"Liu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Petroleum Pollution Control CNPC Research Institute of Safety &amp; Environment Technology Beijing 102206 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiangyu","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Hunan University Changsha 410082 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