Authors
Yao-Ting Wang, Tsu-Lien Hung, Anton S Pozdeev, Alexander S Ivanov, Hsin-Kuan Liu, Yu-Chun Chuang, Chung-Kai Chang, Jeng-Lung Chen, Ilja Popovs, Watchareeya Kaveevivitchai, Teng-Hao Chen
Published in
Inorganic chemistry. Volume 65. Issue 32. Pages 18738-18747. Aug 17, 2026.
Abstract
The development of advanced physisorption-based adsorbents is essential for carbon dioxide (CO2) capture technologies. While metal-organic frameworks (MOFs) offer a promising alternative to traditional carbon capture methods, they often face a trade-off between high adsorption affinity and energy-intensive regeneration. In this work, we report an anionic copper-triazolate framework, NCKU-56 (NCKU = National Cheng Kung University), incorporating quinone-based organic linkers. The 1D channels exhibit moderate structural flexibility and reversible lattice adjustments that are specifically correlated with CO2 adsorption. This material demonstrates high CO2/N2 IAST selectivity of 65 and 315 (50/50, 15/85, v/v) at 298 K and a moderate isosteric heat of adsorption of 30.1 kJ mol-1, which facilitates rapid regeneration without high thermal energy penalties. Crystallographic analysis reveals that the selective uptake is driven by cooperative host-guest interactions, including quadrupole-π interactions (with quinone cores and triazolate rings) and hydrogen bonding between CO2 and [NH2(CH3)2]+ cations. Breakthrough experiments confirm the practical efficacy of NCKU-56 for CO2/N2 separation, highlighting the potential of integrating polar functional groups and π systems with moderate framework flexibility for energy-efficient carbon capture.
PMID:
42606271
Bibliographic data and abstract were imported from PubMed on 17 Aug 2026.
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