Robust Single-Supermolecule Switches Operating in Response to Two Different Noncovalent Interactions

Ping Zhou, Yanjun Fu, Maolin Wang, Renhui Qiu, Yuwei Wang, J. Fraser Stoddart*, Yuping Wang*, and Hongliang Chen*

Abstract：

Supramolecular electronics provide an opportunity to introduce molecular assemblies into electronic devices through a combination of noncovalent interactions such as [π···π] and hydrogen-bonding interactions. The fidelity and dynamics of noncovalent interactions hold considerable promise when it comes to building devices with controllable and reproducible switching functions. Here, we demonstrate a strategy for building electronically robust switches by harnessing two different noncovalent interactions between a couple of pyridine derivatives. The single-supermolecule switch is turned ON when compressing the junction enabling [π···π] interactions to dominate the transport, while the switch is turned OFF by stretching the junction to form hydrogen-bonded dimers, leading to a dramatic decrease in conductance. The robustness and reproducibility of these single-supermolecule switches were achieved by modulating the junction with Ångström precision at frequencies of up to 190 Hz while obtaining high ON/OFF ratios of ∼600. The research presented herein opens up an avenue for designing robust bistable mechanoresponsive devices which will find applications in the building of integrated circuits for microelectromechanical systems.

论文链接：

https://pubs.acs.org/doi/10.1021/jacs.3c03282

媒体报道：

【超分子】超分子电子学新进展：分子尺度操纵非共价作用力可逆切换

校友信息

π-Lab 2022届硕士毕业生

周萍

毕业去向：PhD student 博士生

Zhejiang University 浙江大学

浙江大学stooddart分子科学研究中心

指导老师：陈洪亮 研究员/博导

研究方向：Supramolecular Electronics 超分子电子学

编 辑：苑子恒 夏钟升