One-way rotation of a chemically anchored single molecule-rotor,Nanoscale

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One-way rotation of a chemically anchored single molecule-rotor
Nanoscale ( IF 5.8 ) Pub Date : 2021-09-22 , DOI: 10.1039/d1nr04583k
Frank Eisenhut ₁ , Tim Kühne ₁ , Jorge Monsalve ₁ , Saurabh Srivastava ₂ , Dmitry A Ryndyk _{3,

4} , Gianaurelio Cuniberti ₃ , Oumaima Aiboudi ₅ , Franziska Lissel ₅ , Vladimír Zobač ₆ , Roberto Robles ₆ , Nicolás Lorente ₆ , Christian Joachim ₂ , Francesca Moresco ₁

Affiliation

We present the chemical anchoring of a DMBI-P molecule-rotor to the Au(111) surface after a dissociation reaction. At the temperature of 5 K, the anchored rotor shows a sequential unidirectional rotational motion through six defined stations induced by tunneling electrons. A typical voltage pulse of 400 mV applied on a specific location of the molecule causes a unidirectional rotation of 60° with a probability higher than 95%. When the temperature of the substrate increases above 20 K, the anchoring is maintained and the rotation stops being unidirectional and randomly explores the same six stations. Density functional theory simulations confirm the anchoring reaction. Experimentally, the rotation shows a clear threshold at the onset of the C–H stretch manifold, showing that the molecule is first vibrationally excited and later it decays into the rotational degrees of freedom.

中文翻译：

化学锚定单分子转子的单向旋转

我们展示了 DMBI-P 分子转子在解离反应后化学锚定到 Au(111) 表面。在 5 K 的温度下，锚定转子通过由隧道电子引起的六个定义的站显示出连续的单向旋转运动。施加在分子特定位置的典型 400 mV 电压脉冲导致 60° 单向旋转，概率高于 95%。当基板的温度增加到 20 K 以上时，锚定被保持，旋转停止单向并随机探索相同的六个站。密度泛函理论模拟证实了锚定反应。实验上，旋转在 C-H 拉伸流形开始时显示出明显的阈值，

更新日期：2021-09-22

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