Third-Generation Light-Driven Symmetric Molecular Motors.
Third-Generation Light-Driven Symmetric Molecular Motors.
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DOI：
10.1021/jacs.7b04412
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发表时间：
2017-07-19
影响因子：
15
通讯作者：
Feringa BL
中科院分区：
文献类型：
--
作者：
Kistemaker JCM;Štacko P;Roke D;Wolters AT;Heideman GH;Chang MC;van der Meulen P;Visser J;Otten E;Feringa BL
基于两个过度拥挤的烯烃的对称分子马达，明显没有立体生成中心，在开发更先进的纳米机器方面具有潜在的作用，可以在表面上提供可控的运动。阐明这些第三代电机的关键参数和局限性对于基于光驱动旋转运动的优化分子机器的设计是至关重要的。在这里，我们展示了一系列第三代光驱动分子马达的热和光化学旋转行为。施加在转子上的核心单元的位阻被证明是控制旋转速度的关键，在这种情况下，尺寸越小，势垒就越低。假不对称碳中心的存在为马达提供了单向性。通过调节桥头取代基的空间效应，可以精确地控制偏转运动的方向，这可以从两个马达的设计中得到说明，这两个马达相对于甲基取代基表现出相反的旋转。第三代分子马达有可能是迄今为止最快的基于过度拥挤的烯烃的分子马达，用于可视化其两个转子单元的等速旋转。自主旋转行为完美地遵循了预测模型，为功能动态系统的更先进电机奠定了基础。
Symmetric molecular motors based on two overcrowded alkenes with a notable absence of a stereogenic center show potential to function as novel mechanical systems in the development of more advanced nanomachines offering controlled motion over surfaces. Elucidation of the key parameters and limitations of these third-generation motors is essential for the design of optimized molecular machines based on light-driven rotary motion. Herein we demonstrate the thermal and photochemical rotational behavior of a series of third-generation light-driven molecular motors. The steric hindrance of the core unit exerted upon the rotors proved pivotal in controlling the speed of rotation, where a smaller size results in lower barriers. The presence of a pseudo-asymmetric carbon center provides the motor with unidirectionality. Tuning of the steric effects of the substituents at the bridgehead allows for the precise control of the direction of disrotary motion, illustrated by the design of two motors which show opposite rotation with respect to a methyl substituent. A third-generation molecular motor with the potential to be the fastest based on overcrowded alkenes to date was used to visualize the equal rate of rotation of both its rotor units. The autonomous rotational behavior perfectly followed the predicted model, setting the stage for more advanced motors for functional dynamic systems.
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影响因子：
8.4
作者：
Gallardo I;Guirado G;Hernando J;Morais S;Prats G
通讯作者：
Prats G
影响因子：
15
作者：
Harada, N;Koumura, N;Feringa, BL
通讯作者：
Feringa, BL
影响因子：
15
作者：
BOTT, G;FIELD, LD;STERNHELL, S
通讯作者：
STERNHELL, S
DOI：
10.1002/anie.201503375
发表时间：
2015-08-24
期刊：
Angewandte Chemie (International ed. in English)
影响因子：
--
作者：
Kay ER;Leigh DA
通讯作者：
Leigh DA
影响因子：
15
作者：
FERINGA, B;WYNBERG, H
通讯作者：
WYNBERG, H