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Light-induced unfolding and refolding of supramolecular polymer nanofibres.

Adhikari, B; Yamada, Y; Yamauchi, M; Wakita, K; Lin, X; Aratsu, K; Ohba, T; Karatsu, T; Hollamby, MJ; Adachi, S-I; Yagai, S; Takagi, H; Haruki, R; Shimizu, N

Light-induced unfolding and refolding of supramolecular polymer nanofibres. Thumbnail


Authors

B Adhikari

Y Yamada

M Yamauchi

K Wakita

X Lin

K Aratsu

T Ohba

T Karatsu

S-I Adachi

S Yagai

H Takagi

R Haruki

N Shimizu



Abstract

Unlike classical covalent polymers, one-dimensionally (1D) elongated supramolecular polymers (SPs) can be encoded with high degrees of internal order by the cooperative aggregation of molecular subunits, which endows these SPs with extraordinary properties and functions. However, this internal order has not yet been exploited to generate and dynamically control well-defined higher-order (secondary) conformations of the SP backbone, which may induce functionality that is comparable to protein folding/unfolding. Herein, we report light-induced conformational changes of SPs based on the 1D exotic stacking of hydrogen-bonded azobenzene hexamers. The stacking causes a unique internal order that leads to spontaneous curvature, which allows accessing conformations that range from randomly folded to helically folded coils. The reversible photoisomerization of the azobenzene moiety destroys or recovers the curvature of the main chain, which demonstrates external control over the SP conformation that may ultimately lead to biological functions.

Journal Article Type Article
Acceptance Date Mar 14, 2017
Publication Date May 10, 2017
Publicly Available Date Mar 28, 2024
Journal Nature Communications
Print ISSN 2041-1723
Peer Reviewed Peer Reviewed
Volume 8
Article Number 15254
DOI https://doi.org/10.1038/ncomms15254
Keywords self-assembly; supramolecular polymers
Publisher URL https://www.nature.com/articles/ncomms15254

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