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250714s2025 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202504622
|2 doi
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|a pubmed25n1531.xml
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|a (DE-627)NLM388968966
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|a (NLM)40411855
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Tian, Xiaohe
|e verfasserin
|4 aut
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| 245 |
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|a Building Unit Engineering Toward COF Membranes with Controlled Stacking for H2 Purification
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|c 2025
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 15.08.2025
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2025 Wiley‐VCH GmbH.
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|a 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-selectivity trade-off and instability under real-world operating conditions. While covalent organic framework (COF) membranes hold promise, their overlarge pores and poor film-processibility are to be imperatively solved. Herein, a ternary building unit system is designed for synthesizing imine-based COF nanosheets with programmable interlayer offsets. By synergizing a planar aldehyde monomer as the basic structural unit and a none-planar alkyl-functionalized aldehyde monomer as the structure regulation unit, we induce layer distortion that disrupts π-π dominated AA stacking, enabling angstrom-precise pore tuning (1.4-0.6 nm) via controlled transitions to AB stacking while retaining crystallinity. The mechanically robust nanosheets are easily assembled into large-area membranes via a facile blade casting, overcoming the processability bottleneck associated with binary building unit systems. The resulting membranes demonstrate an exceptional H2/CO2 selectivity of 60, surpassing existing benchmarks. When treating gas mixtures from methanol steam reforming, a two-stage membrane process achieves 99.5% H2 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
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|a Journal Article
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|a COF membrane
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|a hydrogen purification
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| 650 |
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|a interlayer stacking
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| 650 |
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4 |
|a pore tuning
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| 700 |
1 |
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|a Huan, Haishan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Keming
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Rui
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Longjie
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Xiangyu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Xiangyi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yu, Yueyangchao
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Gu, Tianhe
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Shaofei
|e verfasserin
|4 aut
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| 700 |
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|a Jiang, Zhongyi
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 37(2025), 32 vom: 06. Aug., Seite e2504622
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
1 |
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|g volume:37
|g year:2025
|g number:32
|g day:06
|g month:08
|g pages:e2504622
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| 856 |
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|u http://dx.doi.org/10.1002/adma.202504622
|3 Volltext
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