文献类型：期刊文献

英文题名：Bias-Voltage-Driven Single-Molecule Switches with Positive and Negative Responses

作者：Li, Yunpeng[1];Shen, Yanfeng[1];Wang, Rui[1];Yang, Jiawei[1];Wang, Xiaohui[1];Li, Hongxiang[1]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Inst Fine Chem,Key Lab Adv Mat,Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：18

期号：9

起止页码：14213

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20261120260116);WOS:【SCI-EXPANDED(收录号:WOS:001704579100001)】；

基金：This work was supported by the National Natural Science Foundation of China (52273176, 22575084, and 22405088), the Science and Technology Commission of Shanghai Municipality (24DX1400200), the Fundamental Research Funds for the Central Universities, and the East China University of Science and Technology.

语种：英文

外文关键词：molecular electrical switches; single-molecule junctions; molecular electronics; benzothiadiazole; low-bandgaporganic semiconductors; electronic coupling

摘要：Developing all-electrically driven molecular switches with different responses is crucial for molecular circuits to achieve complex logical operations and self-protection. Herein, benzothiadiazole (BTZ)-centered molecular wires were synthesized, and their charge transport properties were investigated. Conductance measurements revealed that all wires exhibited bias voltage-driven switching behaviors under low bias voltage. Specifically, the wires with thiomethyl as an anchor displayed positive response switching, while those with pyridine as an anchor showed negative response switching. The maximum on/off conductance ratios reached up to 28.8 and 30.2 for positive and negative response switches, respectively, which are among the highest values for all-electrically driven molecular switches. Control experiments and theoretical calculations indicated that the switching characteristics originated from the dependence of the frontier energy levels of the wires and the Au-pi interactions of the junctions on the bias voltage. These findings will aid in the design of high-performance bias voltage-driven molecular devices and advance the development of molecular electronics.