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Shape-Memory Nanopores Induced in Coordination Frameworks by Crystal Downsizing
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- Yoko Sakata
- World Premier International Research Initiative–Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
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- Shuhei Furukawa
- World Premier International Research Initiative–Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
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- Mio Kondo
- World Premier International Research Initiative–Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
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- Kenji Hirai
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
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- Nao Horike
- Exploratory Research for Advanced Technology (ERATO) Kitagawa Integrated Pores Project, Japan Science and Technology Agency (JST), Kyoto Research Park Building #3, Shimogyo-ku, Kyoto 600-8815, Japan.
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- Yohei Takashima
- Exploratory Research for Advanced Technology (ERATO) Kitagawa Integrated Pores Project, Japan Science and Technology Agency (JST), Kyoto Research Park Building #3, Shimogyo-ku, Kyoto 600-8815, Japan.
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- Hiromitsu Uehara
- Exploratory Research for Advanced Technology (ERATO) Kitagawa Integrated Pores Project, Japan Science and Technology Agency (JST), Kyoto Research Park Building #3, Shimogyo-ku, Kyoto 600-8815, Japan.
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- Nicolas Louvain
- World Premier International Research Initiative–Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
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- Mikhail Meilikhov
- Exploratory Research for Advanced Technology (ERATO) Kitagawa Integrated Pores Project, Japan Science and Technology Agency (JST), Kyoto Research Park Building #3, Shimogyo-ku, Kyoto 600-8815, Japan.
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- Takaaki Tsuruoka
- Exploratory Research for Advanced Technology (ERATO) Kitagawa Integrated Pores Project, Japan Science and Technology Agency (JST), Kyoto Research Park Building #3, Shimogyo-ku, Kyoto 600-8815, Japan.
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- Seiji Isoda
- World Premier International Research Initiative–Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
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- Wataru Kosaka
- Exploratory Research for Advanced Technology (ERATO) Kitagawa Integrated Pores Project, Japan Science and Technology Agency (JST), Kyoto Research Park Building #3, Shimogyo-ku, Kyoto 600-8815, Japan.
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- Osami Sakata
- Synchrotron X-ray Station at SPring-8, National Institute for Materials Science (NIMS), Kouto, Sayo, Hyogo 679-5148, Japan.
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- Susumu Kitagawa
- World Premier International Research Initiative–Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
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Description
<jats:title>Size Affects Shape</jats:title> <jats:p> Porous molecular framework materials can adopt a different phase when guest molecules absorb and uniformly distort the framework. Usually the framework returns to its original shape when the guests desorb. <jats:bold> Sakata <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="193" related-article-type="in-this-issue" vol="339" xlink:href="10.1126/science.1231451">193</jats:related-article> ) noted that because surface stress drives this process, it might be avoided in smaller crystals. Indeed, a flexible porous coordination polymer, [Cu <jats:sub>2</jats:sub> (dicarboxylate) <jats:sub>2</jats:sub> (amine)] <jats:sub> <jats:italic>n</jats:italic> </jats:sub> , could retain the structure induced by guest molecules such as methanol if crystallites were made sufficiently small (submicrometer scale) and did so to a greater degree as the crystallite dimensions decreased. </jats:p>
Journal
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- Science
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Science 339 (6116), 193-196, 2013-01-11
American Association for the Advancement of Science (AAAS)
