Xu Shi-Nuo, Zheng Yan, Ye Jing-Yao, Chen Zhong-Yang, Yan Jian-Feng, Geng Yan-Hou, Hong Wenjing, Yuan Yao-Feng
Department of Chemistry, Fuzhou University, Fuzhou 350108, China.
State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Dalton Trans. 2023 Apr 4;52(14):4349-4354. doi: 10.1039/d3dt00011g.
Here, we report the synthesis, structure, and single-molecule conductance of three -carborane-based molecular wires (-, - and -CN) with multiple conduction channels. The effect of connectivity in target wires compared with the corresponding phenyl-centered wires was studied using the scanning tunneling microscope break junction (STM-BJ) technique and theoretical calculations. Interestingly, the three-dimensional structure in -carborane-based wires can effectively promote the through-space transmission paths or the formation of stable molecular junctions compared to the corresponding phenyl-centered wires. Moreover, the significant conductance difference of -carborane-based wires was due to the combination of multiple conduction channels and quantum interference. Understanding the effects of different bridging groups and anchor group substitution patterns provides guidelines for designing -carborane-based multichannel molecular wires.
在此，我们报告了三种具有多个传导通道的基于碳硼烷的分子线（-、-和-CN）的合成、结构及单分子电导。使用扫描隧道显微镜断结（STM-BJ）技术和理论计算，研究了目标分子线中连接性与相应以苯基为中心的分子线相比所产生的影响。有趣的是，与相应以苯基为中心的分子线相比，基于碳硼烷的分子线中的三维结构可有效促进空间穿越传输路径或稳定分子结的形成。此外，基于碳硼烷的分子线显著的电导差异是由于多个传导通道和量子干涉的共同作用。了解不同桥连基团和锚定基团取代模式的影响为设计基于碳硼烷的多通道分子线提供了指导。
