Light-controlled micron-scale molecular motion

Samperi, Mario; Bdiri, Bilel; Sleet, Charlotte D.; Markus, Robert; Mallia, Ajith R.; Pérez-García, Lluïsa; Amabilino, David B.

Abstract

The micron-scale movement of biomolecules along supramolecular pathways, mastered by nature, is a remarkable system requiring strong yet reversible interactions between components under the action of a suitable stimulus. Responsive microscopic systems using a variety of stimuli have demonstrated impressive relative molecular motion. However, locating the position of a movable object that travels along self-assembled fibres under an irresistible force has yet to be achieved. Here, we describe a purely supramolecular system where a molecular ‘traveller’ moves along a ‘path’ over several microns when irradiated with visible light. Real-time imaging of the motion in the solvated state using total internal reflection fluorescence microscopy shows that anionic porphyrin molecules move along the fibres of a bis-imidazolium gel upon irradiation. Slight solvent changes mean movement and restructuring of the fibres giving microtoroids, indicating control of motion by fibre mechanics with solvent composition. The insight provided here may lead to the development of artificial travellers that can perform catalytic and other functions. [Figure not available: see fulltext.].

Citation

Samperi, M., Bdiri, B., Sleet, C. D., Markus, R., Mallia, A. R., Pérez-García, L., & Amabilino, D. B. (2021). Light-controlled micron-scale molecular motion. Nature Chemistry, 13(12), 1200-1206. https://doi.org/10.1038/s41557-021-00791-2

• Journal Article Type: Article
• Acceptance Date: Aug 19, 2021
• Online Publication Date: Oct 11, 2021
• Publication Date: Dec 1, 2021
• Deposit Date: Oct 18, 2021
• Publicly Available Date: Apr 12, 2022
• Journal: Nature Chemistry
• Print ISSN: 1755-4330
• Electronic ISSN: 1755-4349
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 13
• Issue: 12
• Pages: 1200-1206
• DOI: https://doi.org/10.1038/s41557-021-00791-2
• Keywords: General Chemical Engineering; General Chemistry
• Public URL: https://nottingham-repository.worktribe.com/output/6500871
• Publisher URL: https://www.nature.com/articles/s41557-021-00791-2