Magnetotactic molecular architectures from self-assembly of β-peptide foldamers

Sunbum Kwon, Beom Jin Kim, Hyung-Kyu Lim, Kyungtae Kang, Sung Hyun Yoo, Jintaek Gong, Eunyoung Yoon, Juno Lee, Insung S. Choi, Hyungjun Kim () and Hee-Seung Lee ()
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Sunbum Kwon: Molecular-Level Interface Research Center
Beom Jin Kim: Molecular-Level Interface Research Center
Hyung-Kyu Lim: Graduate School of Energy Environment Water Sustainability (EEWS)
Kyungtae Kang: Molecular-Level Interface Research Center
Sung Hyun Yoo: Molecular-Level Interface Research Center
Jintaek Gong: Molecular-Level Interface Research Center
Eunyoung Yoon: Molecular-Level Interface Research Center
Juno Lee: Molecular-Level Interface Research Center
Insung S. Choi: Molecular-Level Interface Research Center
Hyungjun Kim: Graduate School of Energy Environment Water Sustainability (EEWS)
Hee-Seung Lee: Molecular-Level Interface Research Center

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract The design of stimuli-responsive self-assembled molecular systems capable of undergoing mechanical work is one of the most important challenges in synthetic chemistry and materials science. Here we report that foldectures, that is, self-assembled molecular architectures of β-peptide foldamers, uniformly align with respect to an applied static magnetic field, and also show instantaneous orientational motion in a dynamic magnetic field. This response is explained by the amplified anisotropy of the diamagnetic susceptibilities as a result of the well-ordered molecular packing of the foldectures. In addition, the motions of foldectures at the microscale can be translated into magnetotactic behaviour at the macroscopic scale in a way reminiscent to that of magnetosomes in magnetotactic bacteria. This study will provide significant inspiration for designing the next generation of biocompatible peptide-based molecular machines with applications in biological systems.

Date: 2015
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DOI: 10.1038/ncomms9747

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