Unidirectional rotary motion in a metal-organic framework
Unidirectional rotary motion in a metal-organic framework
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DOI：
10.1038/s41565-019-0401-6
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发表时间：
2019-05-01
影响因子：
38.3
通讯作者：
Feringa, Ben L.
中科院分区：
文献类型：
--
作者：
Danowski, Wojciech;van Leeuwen, Thomas;Feringa, Ben L.
过度拥挤的基于烯烃的光驱动分子马达能够进行大振幅的重复单向旋转。它们的行为在溶液中很容易理解。然而，布朗运动阻碍了利用协同行动所需的纳米级精确定位。在这里，我们展示了在晶体金属有机框架（MOFs）中组织的分子马达。运动单元成为有机连接件（或支柱）的一部分，通过粉末和单晶x射线分析以及偏振光学和拉曼显微镜来阐明其空间排列。我们确认在MOF框架中保留了电机单元的光驱动单向旋转，并且电机可以在固态中以与溶液中相似的转速（热螺旋反转速率）运行。这些imoto- mof可以在未来用于控制晶体材料的动态功能。
Overcrowded alkene-based light-driven molecular motors are able to perform large-amplitude repetitive unidirectional rotations. Their behaviour is well understood in solution. However, Brownian motion precludes the precise positioning at the nanoscale needed to harness cooperative action. Here, we demonstrate molecular motors organized in crystalline metal-organic frameworks (MOFs). The motor unit becomes a part of the organic linker (or strut), and its spatial arrangement is elucidated through powder and single-crystal X-ray analyses and polarized optical and Raman microscopies. We confirm that the light-driven unidirectional rotation of the motor units is retained in the MOF framework and that the motors can operate in the solid state with similar rotary speed (rate of thermal helix inversion) to that in solution. These imoto-MOFs' could in the future be used to control dynamic function in crystalline materials.