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タイトル: Readily accessible shape-memory effect in a porous interpenetrated coordination network
著者: Shivanna, Mohana
Yang, Qing-Yuan
Bajpai, Alankriti
Sen, Susan
Hosono, Nobuhiko
Kusaka, Shinpei
Pham, Tony
Forrest, Katherine A.
Space, Brian
Kitagawa, Susumu
Zaworotko, Michael J.
著者名の別形: 細野, 暢彦
日下, 心平
北川, 進
発行日: 27-Apr-2018
出版者: American Association for the Advancement of Science (AAAS)
誌名: Science Advances
巻: 4
号: 4
論文番号: eaaq1636
抄録: Shape-memory effects are quite well-studied in general, but there is only one reported example in the context of porous materials. We report the second example of a porous coordination network that exhibits a sorbate-induced shape-memory effect and the first in which multiple sorbates, N2, CO2 and CO promote this effect. The material, a new threefold interpenetrated pcu network, [Zn2(4, 4′-biphenyldicarboxylate)2(1, 4-bis(4-pyridyl)benzene)]n (X-pcu-3-Zn-3i), exhibits three distinct phases: the as-synthesized α phase; a denser-activated β phase; and a shape-memory γ phase, which is intermediate in density between the α and β phases. The γ phase is kinetically stable over multiple adsorption/desorption cycles and only reverts to the β phase when heated at >400 K under vacuum. The α phase can be regenerated by soaking the γ phase in N, N′-dimethylformamide. Single-crystal x-ray crystallography studies of all three phases provide insight into the shape-memory phenomenon by revealing the nature of interactions between interpenetrated networks. The β and γ phases were further investigated by in situ coincidence powder x-ray diffraction, and their sorption isotherms were replicated by density functional theory calculations. Analysis of the structural information concerning the three phases of X-pcu-3-Zn-3i enabled us to understand structure-function relationships and propose crystal engineering principles for the design of more examples of shape-memory porous materials.
記述: ガスを吸って形状を記憶する柔らかい多孔質結晶の合成に成功しました. 京都大学プレスリリース. 2018-05-02.
著作権等: © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
URI: http://hdl.handle.net/2433/230941
DOI(出版社版): 10.1126/sciadv.aaq1636
関連リンク: http://www.kyoto-u.ac.jp/ja/research/research_results/2018/180428_1.html
出現コレクション:学術雑誌掲載論文等

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