Song Jianjian, Zhu Jianglin, Wang Zhaoyong, Liu Gang
School of Petroleum Engineering, Yangtze University, Wuhan 430100, China.
Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524000, China.
Materials (Basel). 2022 Nov 4;15(21):7801. doi: 10.3390/ma15217801.
This paper describes the influence of the transannular π-π interaction in controlling the carrier transport in molecular wires by employing the STM break junction technique. Five pentaphenylene-based molecular wires that contained [2.2]paracyclophane-1,9-dienes (PCD) as the building block were prepared as model compounds. Functional substituents with different electronic properties, ranging from strong acceptors to strong donors, were attached to the top parallel aromatic ring and used as a gate. It was found that the carrier transport features of these molecular wires, such as single-molecule conductance and a charge-tunneling barrier, can be systematically controlled through the transannular π-π interaction.
本文描述了通过采用扫描隧道显微镜断结技术，跨环π-π相互作用对控制分子导线中载流子传输的影响。制备了五种以[2.2]对环芳烷-1,9-二烯（PCD）为结构单元的并五苯基金属有机分子导线作为模型化合物。具有不同电子性质（从强受体到强供体）的功能取代基连接到顶部平行芳香环上，并用作栅极。研究发现，这些分子导线的载流子传输特性，如单分子电导和电荷隧穿势垒，可以通过跨环π-π相互作用进行系统控制。
