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A Solid-State Transformation of Hydrogen-Bonded Organic Frameworks for Efficient Acetylene Storage and Gas Separation
- Source :
- Chem & Bio Engineering, Vol 1, Iss 7, Pp 615-622 (2024)
- Publication Year :
- 2024
- Publisher :
- American Chemical Society, 2024.
-
Abstract
- Developing robust microporous hydrogen-bonded organic frameworks (HOFs) is crucial for exploring novel physical adsorbents and revealing the structure–property relationship of hydrogen-bonding pairing behaviors. However, it is still challenging to obtain dense and stable hydrogen-bonded frameworks due to the rigidity and spatial resistance of the tectonic centers. Herein, we report a robust microporous HOF (HOF-ZSTU-4) via 4,4′,4′,4″-([1,1′-biphenyl]-4,4′-diylbis­(azanetriyl))­tetrabenzoic acid (H4BDATB) with flexible nitrogen nodes composing the tectonic center. Single-crystal X-ray diffraction (SCXRD) analysis shows that the activated framework undergoes a solid-to-solid phase transition because of the torsion of the carboxyl–carboxyl dimer, leading to the switching of the framework from the sql topology to the cds topology (HOF-ZSTU-4a). The single-component gas sorption isotherm reveals that HOF-ZSTU-4a has a C2H2 packing density of 0.54 kg L–1, marking it as the most efficient among reported HOFs. In addition, HOF-ZSTU-4a exhibits promising separation selectivity for several binary gas mixtures, and the dynamic separation performance for C2H2/CO2, CO2/N2, and CH4/N2 is verified by dynamic breakthrough experiments.
- Subjects :
- Chemical engineering
TP155-156
Biotechnology
TP248.13-248.65
Subjects
Details
- Language :
- English
- ISSN :
- 2836967X
- Volume :
- 1
- Issue :
- 7
- Database :
- Directory of Open Access Journals
- Journal :
- Chem & Bio Engineering
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.674a55b0cb4b24be76f3059e9636e9
- Document Type :
- article
- Full Text :
- https://doi.org/10.1021/cbe.3c00100