Table · dataset · 2026
Nanopore Engineering in Scalable Metal–Organic Frameworks for C<sub>2</sub>H<sub>4</sub> Purification from Ternary Mixtures
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The selective separation of ethylene (C<sub>2</sub>H<sub>4</sub>), carbon dioxide (CO<sub>2</sub>), and acetylene (C<sub>2</sub>H<sub>2</sub>) remains a critical challenge owing to their strikingly similar molecular sizes, polarities, and physical properties.
Description
Herein, we demonstrate that precise engineering of a sub-nanometric pore environment in metal–organic frameworks (MOFs) enables optimal separation of ternary C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> mixtures.
By modulating the functional groups on triazole ligands and introducing H<sub>2</sub>msa as a flexible bridging linker, we assembled two pcu-type MOFs: Zn-Atz-Msa (<b>1</b>) and Zn-Mtz-Msa (<b>2</b>) (H<sub>2</sub>msa = methylsuccinic acid, Hatz = 3-amino-1, 2, 4-triazole, Hmtz = 3-methyl-1,2,4-triazole). Compound <b>1</b> features ultra-microporous channels suited for C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> separation, whereas compound <b>2</b> exhibits significantly enhanced potential for multicomponent separation, attributable to its well-defined pore architecture and negatively charged pillar ligands that establish strong C–H···N and C–H···O/N interactions with C<sub>2</sub>H<sub>2</sub> molecules.
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These structural and chemical attributes endow <b>2</b> with preferential C<sub>2</sub>H<sub>2</sub> adsorption over C<sub>2</sub>H<sub>4</sub> and CO<sub>2</sub> in both binary and ternary mixtures, positioning it among the few materials capable of one-step purification of polymer-grade C<sub>2</sub>H<sub>4</sub> from a C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> (0.5/0.5/9.0, <i>v</i>/<i>v</i>/<i>v</i>) mixture.
Notably, <b>2</b> can be synthesized at large scale via a straightforward reflux method, underscoring its practical potential as a rare and highly effective porous adsorbent for industrial gas separation and purification.
Links
Where it is published
- DOI doi.org/10.1021/acs.inorgchem.6c04385.s001 ↗
DOI / persistent id · from zivahub uct ac za
Catalogue records · 1
- OAI-PMH record api.figshare.com/v2/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Af… ↗
metadata API · from zivahub uct ac za
Topics
- From keywords
- Astronomy & Astrophysics · Chemistry · Earth & Environmental Science · Ecology · Engineering · Life Sciences · Medicine & Health
Provenance · 1 source records, 12 field assertions
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|---|---|---|---|
| ZivaHub | oai:figshare.com:article/34024101 | 12 d ago | JSON v1 |
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| title | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | /metadata/dc/title |