Four-State Molecular Shuttling of [2]Rotaxanes in Response toAcid/Base and Alkali-Metal Cation Stimuli

Material type: 文書・図像類

Author: Kimura, Masakiほか

Publisher: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Publication date: 2017-04-13

Material Format: Digital

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Note (General)：: In this study, we synthesized [2]rotaxanes possessing three recognition sites—a dialkylammonium, an alkylarylamine, and a tetra(ethylene glycol) stati...

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Material Type: 文書・図像類
Title: Four-State Molecular Shuttling of [2]Rotaxanes in Response toAcid/Base and Alkali-Metal Cation Stimuli
Author/Editor: Kimura, Masaki
Mizuno, Takuma
Ueda, Masahiro
Miyagawa, Shinobu
Kawasaki, Tsuneomi
Tokunaga, Yuji
Author Heading: Kimura, Masaki
Mizuno, Takuma
Ueda, Masahiro
Miyagawa, Shinobu
Kawasaki, Tsuneomi
Tokunaga, Yuji
Publication, Distribution, etc.: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Publication Date: 2017-04-13
Publication Date (W3CDTF): 2017-04-13
Periodical title: Chemistry an Asian journal
No. or year of volume/issue: 12
Volume: 12
Pages: 1381-1390
ISSN (Periodical Title): ISSN : 1861-4728
Text Language Code: eng
Target Audience: 一般
Note (General): In this study, we synthesized [2]rotaxanes possessing three recognition sites—a dialkylammonium, an alkylarylamine, and a tetra(ethylene glycol) stations—in their dumbbell-like axle component and dibenzo[24]crown-8 (DB24C8) as their macrocyclic component. These [2]rotaxanes behaved as four-state molecular shuttles: i) under acidic conditions, the DB24C8 unit encircled both the dialkylammonium and alkylarylammonium stations; ii) under neutral conditions, the dialkylammonium unit was the predominant station for the DB24C8 component; iii) under basic conditions, when both ammonium centers were deprotonated, the alkylarylamine unit became a suitable station for theDB24C8 component; and iv) under basic conditions in the presence of an alkali-metal cation, the tetra(ethylene glycol) unit recognized the DB24C8 component through cooperative binding of the alkali-metal ion. In addition, we observed that the [2]rotaxanes exhibited selective recognition for metal cations. These shuttling motions of the macrocyclic component proceeded reversibly.
Access Restrictions: 限定公開
Rights (production): 〓 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Related Material (DOI): 10.1002/asia.201700493
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ