Induction and control of supramolecular chirality by light in self-assembled helical nanostructures

Jisung Kim, Jinhee Lee, Woo Young Kim, Hyungjun Kim, Sanghwa Lee, Hee Chul Lee, Yoon Sup Lee, Myungeun Seo () and Sang Youl Kim ()
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Jisung Kim: Korea Advanced Institute of Science and Technology (KAIST)
Jinhee Lee: Korea Advanced Institute of Science and Technology (KAIST)
Woo Young Kim: KAIST
Hyungjun Kim: Korea Advanced Institute of Science and Technology (KAIST)
Sanghwa Lee: Korea Advanced Institute of Science and Technology (KAIST)
Hee Chul Lee: KAIST
Yoon Sup Lee: Korea Advanced Institute of Science and Technology (KAIST)
Myungeun Seo: Graduate School of Nanoscience and Technology, KAIST
Sang Youl Kim: Korea Advanced Institute of Science and Technology (KAIST)

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Evolution of supramolecular chirality from self-assembly of achiral compounds and control over its handedness is closely related to the evolution of life and development of supramolecular materials with desired handedness. Here we report a system where the entire process of induction, control and locking of supramolecular chirality can be manipulated by light. Combination of triphenylamine and diacetylene moieties in the molecular structure allows photoinduced self-assembly of the molecule into helical aggregates in a chlorinated solvent by visible light and covalent fixation of the aggregate via photopolymerization by ultraviolet light, respectively. By using visible circularly polarized light, the supramolecular chirality of the resulting aggregates is selectively and reversibly controlled by its rotational direction, and the desired supramolecular chirality can be arrested by irradiation with ultraviolet circularly polarized light. This methodology opens a route to ward the formation of supramolecular chiral conducting nanostructures from the self-assembly of achiral molecules.

Date: 2015
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DOI: 10.1038/ncomms7959

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