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光控微米尺度分子运动
作者:小柯机器人 发布时间:2021/10/17 1:16:32

英国诺丁汉大学Amabilino, David B.研究团队报道了光控微米尺度分子运动。相关研究成果发表在2021年10月11日出版的国际知名学术期刊《自然—化学》。

生物分子自然具有的沿超分子途径的微米级运动是一个了不起的系统,需要在适当的刺激作用下组分之间进行强大而可逆的相互作用。使用各种刺激的响应性显微镜系统已经显示出令人印象深刻的相对分子运动。然而,在不可抗拒的力作用下沿自组装纤维移动的可移动物体的位置尚未确定。

该文中,研究人员描述了一个纯超分子系统,其中分子“旅行者”在可见光照射下沿着几微米的“路径”移动。使用全内反射荧光显微镜对溶剂化状态下的运动进行实时成像显示,阴离子卟啉分子在辐照下沿着双咪唑凝胶的纤维移动。轻微的溶剂变化意味着纤维的运动和重组产生微环,表明通过溶剂成分的纤维力学控制运动。

该文提供的见解可能会导致人工旅行者的发展,这种旅行者可以执行催化和其他功能。

附:英文原文

Title: Light-controlled micron-scale molecular motion

Author: Samperi, Mario, Bdiri, Bilel, Sleet, Charlotte D., Markus, Robert, Mallia, Ajith R., Prez-Garca, Llusa, Amabilino, David B.

Issue&Volume: 2021-10-11

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.

DOI: 10.1038/s41557-021-00791-2

Source: https://www.nature.com/articles/s41557-021-00791-2

期刊信息

Nature Chemistry:《自然—化学》,创刊于2009年。隶属于施普林格·自然出版集团,最新IF:21.687
官方网址:https://www.nature.com/nchem/
投稿链接:https://mts-nchem.nature.com/cgi-bin/main.plex