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Nanopore Engineering
in Scalable Metal–Organic
Frameworks for C<sub>2</sub>H<sub>4</sub> Purification from Ternary
Mixtures
Xiao-Feng Zhong (17396110)
Hao Zhuo (4446544)
Yi-Le Chen (20956962)
A-Xia-Mo Zhu (25137297)
Pan-Pan Zhang (3278736)
Zi-Meng Xu (22951051)
Si-Yuan Yang (9118050)
Jia-Jun Sun (25137300)
Yang Feng (414202)
Ming Xue (591840)
Biophysics
Biochemistry
Space Science
Physical Sciences not elsewhere classified
Medicine
Biotechnology
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Ecology
Biological Sciences not elsewhere classified
straightforward reflux method
nanometric pore environment
microporous channels suited
large scale via
flexible bridging linker
defined pore architecture
critical challenge owing
chemical attributes endow
assembled two pcu
industrial gas separation
enables optimal separation
2 </ b
2 </ sub
4 </ sub
msa (< b
1 </ b
v </
selective separation
multicomponent separation
precise engineering
practical potential
physical properties
nanopore engineering
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. 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. 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.
2026-09-29T00:00:00Z
Text
Journal contribution
10.1021/acs.inorgchem.6c04385.s001
https://figshare.com/articles/journal_contribution/Nanopore_Engineering_in_Scalable_Metal_Organic_Frameworks_for_C_sub_2_sub_H_sub_4_sub_Purification_from_Ternary_Mixtures/34024101
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