Sub-nanometer supramolecular rectifier based on the symmetric building block with destructive σ-interference

作     者：Longfeng Huang Yu Zhou Yaorong Chen Jingyao Ye Junyang Liu Zongyuan Xiao Chun Tang Haiping Xia Wenjing Hong Longfeng Huang;Yu Zhou;Yaorong Chen;Jingyao Ye;Junyang Liu;Zongyuan Xiao;Chun Tang;Haiping Xia;Wenjing Hong

作者机构：State Key Laboratory of Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy Materials(iChEM)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China Shenzhen Grubbs InstituteDepartment of ChemistrySouthern University of Science and TechnologyShenzhen518055China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2021年第64卷第8期

页      面：1426-1433页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：This work was supported by the National Natural Science Foundation of China(21673195,21722305,21703188,U1705254,21933012,31871877) the National Key R&D Program of China(2017YFA0204902),the Fundamental Research Funds for the Central Universities(20720200068) the Fundamental Research Funds for Xiamen University(20720190002) 

主　　题：electron transport single-molecule studies conducting material molecular devices quantum interference 

摘      要：Molecular rectifier, as a basic function of molecular electronic devices, has attracted extensive attention for the opportunity in constructing sub-nanometer electronic devices. However, tunneling leakage current has a significant contribution as electronic devices shrink in size, which leads to a challenge in fabricating molecular rectifiers at the sub-nanometer scale. Here, we experimentally demonstrate a sub-nanometer molecular rectifier based on the supramolecular junction assembled between water and 1,4-diazabicyclo[2.2.2]octane (DABCO) molecule. The charge transport through DABCO and corresponding supramolecular junctions exhibits destructive σ-interference, ensuring a sharp conductance variation for transmission modulation. The supramolecular interaction between DABCO and water readily introduces the asymmetric electrode-molecule interaction, which combines with the destructive σ-interference to support the sub-nanometer rectification.