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タイトル: | Flexible Coordination Network Exhibiting Water Vapor–Induced Reversible Switching between Closed and Open Phases |
著者: | Shivanna, Mohana Bezrukov, Andrey A. Gascón-Pérez, Victoria Otake, Ken-ichi Sanda, Suresh O’Hearn, Daniel J. Yang, Qing-Yuan Kitagawa, Susumu Zaworotko, Michael J. |
著者名の別形: | 大竹, 研一 北川, 進 |
キーワード: | sorbents structural flexibility water sorption properties atmospheric water harvesting metal−organic frameworks composites stepped isotherm |
発行日: | 31-Aug-2022 |
出版者: | American Chemical Society (ACS) |
誌名: | ACS Applied Materials & Interfaces |
巻: | 14 |
号: | 34 |
開始ページ: | 39560 |
終了ページ: | 39566 |
抄録: | That physisorbents can reduce the energy footprint of water vapor capture and release has attracted interest because of potential applications such as moisture harvesting, dehumidification, and heat pumps. In this context, sorbents exhibiting an S-shaped single-step water sorption isotherm are desirable, most of which are structurally rigid sorbents that undergo pore-filling at low relative humidity (RH), ideally below 30% RH. Here, we report that a new flexible one-dimensional (1D) coordination network, [Cu(HQS)(TMBP)] (H₂HQS = 8-hydroxyquinoline-5-sulfonic acid and TMBP = 4, 4′-trimethylenedipyridine), exhibits at least five phases: two as-synthesized open phases, α ⊃ H₂O and β ⊃ MeOH; an activated closed phase (γ); CO₂ (δ ⊃ CO₂) and C₂H₂ (ϵ ⊃ C₂H₂) loaded phases. The γ phase underwent a reversible structural transformation to α ⊃ H₂O with a stepped sorption profile (Type F-IV) when exposed to water vapor at <30% RH at 300 K. The hydrolytic stability of [Cu(HQS)(TMBP)] was confirmed by powder X-ray diffraction (PXRD) after immersion in boiling water for 6 months. Temperature-humidity swing cycling measurements demonstrated that working capacity is retained for >100 cycles and only mild heating (<323 K) is required for regeneration. Unexpectedly, the kinetics of loading and unloading of [Cu(HQS)(TMBP)] compares favorably with well-studied rigid water sorbents such as Al-fumarate, MOF-303, and CAU-10-H. Furthermore, a polymer composite of [Cu(HQS)(TMBP)] was prepared and its water sorption retained its stepped profile and uptake capacity over multiple cycles. |
著作権等: | Copyright © 2022 The Authors. Published by American Chemical Society This is an open access article published under a Creative Commons Attribution License. |
URI: | http://hdl.handle.net/2433/276719 |
DOI(出版社版): | 10.1021/acsami.2c10002 |
PubMed ID: | 35975756 |
出現コレクション: | 学術雑誌掲載論文等 |
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