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The precise installation of highly interactive functional groups on pore surfaces remains a central challenge in crystalline porous materials since such groups often interfere with framework formation. In this study, supramolecular protection–deprotection was performed in a porous organic salt that temporally separated framework construction from the emergence of pore-surface functionality. During crystallization, the phenolic OH groups were protected by hydrogen bonding with dimethyl sulfoxide (DMSO), enabling the formation of a crystalline framework based on charge-assisted hydrogen bonds. Stepwise removal of DMSO induced a two-step single-crystal-to-single-crystal phase transition, affording first a dormant state (Form II), in which the OH groups remained protected, and subsequently an active state (Form III), in which the OH groups were exposed on the pore surface together with the emergence of porosity. The dormant state was re-formed by exposure to DMSO or N , N -dimethylacetamide vapor, whereas other solvents failed to induce the same structural response. In contrast, the active state showed markedly enhanced NH3 uptake relative to the dormant state and preferential adsorption of NH3 over CO2 , N2 , H2 , and O2 under the investigated conditions. These results demonstrate that supramolecular protection–deprotection provides a useful strategy for temporally controlling pore-surface functionality in dynamic crystalline porous materials.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: crystal engineering, hydrogen bonds, microporous materials, phase transitions, supramolecular chemistry

刊行年月日: 2026-09-28

出版者: Wiley

掲載誌:

• Angewandte Chemie International Edition (ISSN: 14337851) vol. 65 issue. 40 e1547062

研究助成金:

• Japan Society for the Promotion of Science 24H00405
• Japan Society for the Promotion of Science 24K21717

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/anie.1547062

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更新時刻: 2026-11-04 11:12:38 +0900

MDRでの公開時刻: 2026-11-04 12:32:00 +0900