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Mechanism of Macroscopic Motion of Oleate Helical Assemblies : Cooperative Deprotonation of Carboxyl Groups Triggered by Photoisomerization of Azobenzene Derivatives

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Title: Mechanism of Macroscopic Motion of Oleate Helical Assemblies : Cooperative Deprotonation of Carboxyl Groups Triggered by Photoisomerization of Azobenzene Derivatives
Authors: Kageyama, Yoshiyuki Browse this author →KAKEN DB
Ikegami, Tomonori Browse this author
Kurokome, Yuta Browse this author
Takeda, Sadamu Browse this author →KAKEN DB
Keywords: helical structures
isomerization
molecular devices
photochemistry
supramolecular chemistry
Issue Date: 13-Jun-2016
Publisher: Wiley-Blackwell
Journal Title: Chemistry-A European journal
Volume: 22
Issue: 25
Start Page: 8669
End Page: 8675
Publisher DOI: 10.1002/chem.201600426
PMID: 27165777
Abstract: Macroscopic and spatially ordered motions of self-assemblies composed of oleic acid and a small amount of an azobenzene derivative, induced by azobenzene photoisomerization, was previously reported. However, the mechanism of the generation of submillimeter-scale motions by the nanosized structural transition of azobenzene was not clarified. Herein, an underlying mechanism of the motions is proposed in which deprotonation of carboxyl groups in co-operation with azobenzene photoisomerization causes a morphological transition of the self-assembly, which in turn results in macroscopic forceful dynamics. The photoinduced deprotonation was investigated by potentiometric pH titration and FTIR spectroscopy. The concept of hierarchical molecular interaction generating macroscale function is expected to promote the next stage of supramolecular chemistry.
Rights: This is the peer reviewed version of the following article: Y. Kageyama, T. Ikegami, Y. Kurokome, S. Takeda, Chem. Eur. J. 2016, 22, 8669-8675, which has been published in final form at10.1002/chem.201600426. This article may be used for non-commercial purposes in accordance With Wiley-VCH Terms and Conditions for self-archiving
Type: article (author version)
URI: http://hdl.handle.net/2115/66194
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 景山 義之

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