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Multistate Switching of Spin Selectivity in Electron Transport through Light-Driven Molecular Motors
Advanced Science ( IF 14.3 ) Pub Date : 2021-07-22 , DOI: 10.1002/advs.202101773 Qirong Zhu 1 , Wojciech Danowski 2 , Amit Kumar Mondal 1 , Francesco Tassinari 1 , Carlijn L F van Beek 2 , G Henrieke Heideman 2 , Kakali Santra 1 , Sidney R Cohen 3 , Ben L Feringa 2 , Ron Naaman 1
Advanced Science ( IF 14.3 ) Pub Date : 2021-07-22 , DOI: 10.1002/advs.202101773 Qirong Zhu 1 , Wojciech Danowski 2 , Amit Kumar Mondal 1 , Francesco Tassinari 1 , Carlijn L F van Beek 2 , G Henrieke Heideman 2 , Kakali Santra 1 , Sidney R Cohen 3 , Ben L Feringa 2 , Ron Naaman 1
Affiliation
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It is established that electron transmission through chiral molecules depends on the electron's spin. This phenomenon, termed the chiral-induced spin selectivity (CISS), effect has been observed in chiral molecules, supramolecular structures, polymers, and metal-organic films. Which spin is preferred in the transmission depends on the handedness of the system and the tunneling direction of the electrons. Molecular motors based on overcrowded alkenes show multiple inversions of helical chirality under light irradiation and thermal relaxation. The authors found here multistate switching of spin selectivity in electron transfer through first generation molecular motors based on the four accessible distinct helical configurations, measured by magnetic-conductive atomic force microscopy. It is shown that the helical state dictates the molecular organization on the surface. The efficient spin polarization observed in the photostationary state of the right-handed motor coupled with the modulation of spin selectivity through the controlled sequence of helical states, opens opportunities to tune spin selectivity on-demand with high spatio-temporal precision. An energetic analysis correlates the spin injection barrier with the extent of spin polarization.
中文翻译：
光驱动分子马达电子传输中自旋选择性的多态切换
已经确定，电子通过手性分子的传输取决于电子的自旋。这种现象被称为手性诱导自旋选择性（CISS）效应，已在手性分子、超分子结构、聚合物和金属有机薄膜中观察到。在传输中优选哪种自旋取决于系统的旋向性和电子的隧道方向。基于过度拥挤的烯烃的分子马达在光照射和热弛豫下表现出螺旋手性的多次反转。作者在这里发现了电子转移中自旋选择性的多态切换，通过第一代分子马达基于四种可访问的不同螺旋配置，通过磁导原子力显微镜测量。结果表明，螺旋状态决定了表面的分子组织。在右手电机的光静止状态下观察到的高效自旋极化，加上通过受控的螺旋态序列对自旋选择性的调制，为以高时空精度按需调整自旋选择性提供了机会。能量分析将自旋注入势垒与自旋极化程度相关联。
更新日期：2021-09-22
中文翻译：
光驱动分子马达电子传输中自旋选择性的多态切换
已经确定，电子通过手性分子的传输取决于电子的自旋。这种现象被称为手性诱导自旋选择性（CISS）效应，已在手性分子、超分子结构、聚合物和金属有机薄膜中观察到。在传输中优选哪种自旋取决于系统的旋向性和电子的隧道方向。基于过度拥挤的烯烃的分子马达在光照射和热弛豫下表现出螺旋手性的多次反转。作者在这里发现了电子转移中自旋选择性的多态切换，通过第一代分子马达基于四种可访问的不同螺旋配置，通过磁导原子力显微镜测量。结果表明，螺旋状态决定了表面的分子组织。在右手电机的光静止状态下观察到的高效自旋极化，加上通过受控的螺旋态序列对自旋选择性的调制，为以高时空精度按需调整自旋选择性提供了机会。能量分析将自旋注入势垒与自旋极化程度相关联。
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