化学
超分子化学
生物分子
卟啉
化学物理
纳米技术
发色团
分子
光化学
有机化学
材料科学
生物化学
作者
Mario Samperi,Bilel Bdiri,Charlotte D. Sleet,Róbert Márkus,Ajith R. Mallia,Lluïsa Pérez‐García,David B. Amabilino
出处
期刊:Nature Chemistry
[Springer Nature]
日期:2021-10-11
卷期号:13 (12): 1200-1206
被引量:22
标识
DOI:10.1038/s41557-021-00791-2
摘要
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.
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