ArticleNature communications2026
Lone-pair-electron-governed gas-recognizable flexibility in a stable MOF for boosting C
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
Funding
Abstract
The separation of propylene from propane constitutes one of the most energy-demanding processes in the petrochemical industry due to their similar molecular dimensions and physicochemical properties. Flexible MOFs, which undergo selective guest-induced structural transformations, offer an alternative mechanism to amplify subtle molecular differences into distinct adsorption behaviors. Nevertheless, the precise molecular-level modulation of framework flexibility to elicit a selective response to one specific gas over another remains a great challenge. This study confronts this challenge through the rational structural evolution of a hydrolytically stable, pillar-layered Cu-MOF, NJU-Bai5. Our strategy involves the strategic engineering of the pillar ligand, specifically replacing pyridyl with imidazolyl groups. This modification introduces accessible nitrogen lone-pair-electrons, which function as molecular anchors capable of forming selective interactions with hydrogen-bonding donors possessing higher acidity. These interactions, in turn, drive a gas-recognizable flexibility of the framework. The resulting material, NJU-Bai5-bib, exhibits a well-defined, selective gate-opening transition triggered preferentially by C
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