Shape‐Memory Platinum(II) Complexes: Intelligent Vapor‐History Sensor with ON–OFF Switching Function |
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| Authors: | Yasuhiro Shigeta Dr. Atsushi Kobayashi Dr. Tadashi Ohba Dr. Masaki Yoshida Dr. Takeshi Matsumoto Prof. Ho‐Chol Chang Prof. Masako Kato |
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| Affiliation: | 1. Department of Chemistry, Faculty of Science, Hokkaido University, Kita-ku, Sapporo, Japan;2. PRESTO, Japan Science and Technology Agency (JST), Saitama, Japan;3. Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University Katsura, Kyoto, Japan;4. Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, Bunkyo-ku, Tokyo, Japan |
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| Abstract: | A novel platinum(II)–diimine complex, [Pt(CN)2(H2dcphen)] ( 1 ; H2dcphen=4,7‐dicarboxy‐1,10‐ phenanthroline), was synthesized and its vapochromic shape‐memory behavior was evaluated. The as‐synthesized amorphous purple solid, [Pt(CN)2(H2dcphen)]?2 H2O ( 1 P ), exhibited vapochromic behavior in the presence of alcoholic vapors through transformation to a red, crystalline, porous, vapor‐adsorbed form, 1 R?vapor . The obtained 1 R?vapor complex released the adsorbed vapors upon heating without collapse of the porous structure. The vaporfree, porous 1 R?open could detect water or n‐hexane vapor, although these vapors could not induce 1 P ‐to‐ 1 R?vapor transformation, and 1 R?open could easily be converted to the initial 1 P by manual grinding. These results indicate that 1 is a new shape‐memory material that functions through formation and collapse of the porous framework with an emission change upon vapor‐adsorption and grinding; this enables it to exhibit vapor history and ON–OFF switching sensing functions. |
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| Keywords: | chromophores mechanochromism platinum shape-memory effects vapochromism |
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