open access

https://hdl.handle.net/2115/66194

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

英語

supramolecular chemistry

2016-06-13

Wiley-Blackwell

Chemistry-A European journal

22(25)

8669-8675

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.

学術雑誌論文

Accepted Manuscript

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

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