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Title: Control on dimensions and supramolecular chirality of self-assemblies through light and metal ions
Authors: Liu, Guofeng
Sheng, Jianhui
Teo, Wei Liang
Yang, Guangbao
Wu, Hongwei
Li, Yongxin
Zhao, Yanli
Keywords: Science::Chemistry
Issue Date: 2018
Source: Liu, G., Sheng, J., Teo, W. L., Yang, G., Wu, H., Li, Y., & Zhao, Y. (2018). Control on dimensions and supramolecular chirality of self-assemblies through light and metal ions. Journal of the American Chemical Society, 140(47), 16275-16283. doi:10.1021/jacs.8b10024
Journal: Journal of the American Chemical Society
Abstract: Precise control over helical chirality and dimensions of molecular self-assemblies, a remaining challenge for both chemists and materials scientists, is the key to manipulate the property and performance of supramolecular materials. Herein, we report that a cholesterol-azopyridine conjugate could self-assemble into organogels with photocontrollable dimensional transition from 2D microbelts to 1D nanotubes and finally to 0D nanoparticles. The E/ Z-Photoisomerization of the 4-azopyridine unit is the major driving force for the dimensional transformation. Furthermore, the self-assembled structures were observed to exhibit metal ion-mediated helicity inversion through the metal coordination. These observations were collectively confirmed by several techniques including scanning electron microscopy, atomic force microscopy, circular dichroism, and X-ray crystallography. The rational design of building blocks for the construction of dimension and chirality controllable self-assembly systems may lead to versatile applications in smart display, advanced optoelectronic device, and supramolecular asymmetric catalysis.
ISSN: 0002-7863
DOI: 10.1021/jacs.8b10024
Rights: © 2018 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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