Wang Lin, Zhao Zhihao, Shinde Digambar B, Lai Zhiping, Wang Dong
School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, China.
Chem Commun (Camb). 2021 Jan 21;57(5):667-670. doi: 10.1039/d0cc07438a.
Electron transport properties of polycyclic truxene derivatives have been investigated by the single molecule conductance measurement technique and theoretical study. Molecules with nitrogen and carbonyl substituents at the bridge sites exhibit higher single-molecule conductances by almost one order of magnitude compared with non-substituted analogues. It can be ascribed that the anti-resonance feature produced by destructive quantum interference (DQI) is alleviated and pushed away from the Fermi energy. These findings provide an effective chemical strategy for manipulating the DQI behavior in single molecular devices.
通过单分子电导测量技术和理论研究，对多环并四苯衍生物的电子输运性质进行了研究。与未取代的类似物相比，在桥位带有氮和羰基取代基的分子表现出高近一个数量级的单分子电导。这可以归因于由相消量子干涉（DQI）产生的反共振特征得到缓解，并被推离费米能级。这些发现为操纵单分子器件中的DQI行为提供了一种有效的化学策略。
