Hydrogen-bonded organic frameworks in solution enables continuous and high-crystalline membranes

Hydrogen-Bonded organic frameworks (HOFs) are a type of emerging porous materials. At present, little research has been conducted on their solution state. This work demonstrates that HOFs fragment into small particles while maintaining their original assemblies upon dispersing in solvents, as confir...

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Published in:Nature communications 2024-01, Vol.15 (1), p.634-634, Article 634
Main Authors: Yin, Qi, Pang, Kuan, Feng, Ya-Nan, Han, Lili, Morsali, Ali, Li, Xi-Ya, Liu, Tian-Fu
Format: Article
Language:English
Subjects:
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Aggregation behavior
Assemblies
Electron diffraction
Electron microscopy
Humanities and Social Sciences
Hydrogen
Hydrogen bonding
Membranes
multidisciplinary
NMR
Nuclear magnetic resonance
Porosity
Porous materials
Science
Science (multidisciplinary)
Separation
Solvents
Substrates
Zeta potential
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Summary:Hydrogen-Bonded organic frameworks (HOFs) are a type of emerging porous materials. At present, little research has been conducted on their solution state. This work demonstrates that HOFs fragment into small particles while maintaining their original assemblies upon dispersing in solvents, as confirmed by Cryo-electron microscopy coupled with 3D electron diffraction technology. 1D and 2D-Nuclear Magnetic Resonance (NMR) and zeta potential analyses indicate the HOF-based colloid solution and the isolated molecular solution have significant differences in intermolecular interactions and aggregation behavior. Such unique solution processibility allows for fabricating diverse continuous HOF membranes with high crystallinity and porosity through solution-casting approach on various substrates. Among them, HOF-BTB@AAO membranes show high C 3 H 6 permeance (1.979 × 10 −7  mol·s −1 ·m −2 ·Pa −1 ) and excellent separation performance toward C 3 H 6 and C 3 H 8 (SF = 14). This continuous membrane presents a green, low-cost, and efficient separation technology with potential applications in petroleum cracking and purification. Hydrogen-bonded organic frameworks (HOFs) attract increasing attention as porous materials. Despite the widely studied solid-state properties, little research has been done on the solution state. Here, the authors demonstrate that HOFs fragment into small particles while maintaining their original assemblies upon dispersing in solvents.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-024-44921-z