Photoresponsive crown ethers. 9. Cylindrical and phane crown ethers with azobenzene segments as a light-switch functional group.
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概要
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Cylindrical and phane crown ethers with azobenzene segments as a light-switch functional group were synthesized. Cylindrical ionophores in which two diazacrown ethers are linked by two photoresponsive azobenzene pillars change their binding ability for polymethylenediammonium salts in response to photoirradiation. Thus, the distance between the two crown rings can be photocontrolled. A phane-type ionophore in which 1,23-bis(<I>p</I>-aminophenoxy)-3,6,9,12,15,18,21-heptaoxatricosane is linked by a <I>trans</I>-4,4′-azobenzenedicarbonyl segment exhibits no affinity with all alkali metal cations but significantly binds Rb<SUP>+</SUP> and Cs<SUP>+</SUP> under UV-light irradiation. This is the example of the "all-or-nothing" control of the ion-binding ability and implies that a crown-like loop emerges only when the azobenzene segment is photoisomerized to the <I>cis</I>-configuration. These ionophores are categorized to novel photoresponsive crown ethers.
- 公益社団法人 日本化学会の論文
著者
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Shinkai Seiji
Department Of Applied Chemistry Faculty Of Engineering Kyushu University
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Honda Yoshihiro
Department Of Cardiovascular Surgery Yamanashi Central Hospital
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MANABE Osamu
Department of Applied Chemistry, Faculty of Engineering, Nagasaki University
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Ueda Kaori
Department of Industrial Chemistry, Faculty of Engineering, Nagasaki University
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Minami Takahide
Department of Industrial Chemistry, Faculty of Engineering, Nagasaki University
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Tashiro Masashi
Department of Molecular Science and Technology, Graduate School of Engineering Sciences, Kyushu University
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