Li, Xiaohui and Ge, Wenhui and Chen, Lichuan and Wu, Qingqing and Ye, Yuqing and Tang, Xiangqian and Huang, Xiaojuan and Lv, Jieyao and Bai, Jie and Liu, Zitong and Lambert, Colin J. and Hong, Wenjing (2025) Dual-Function Single-Molecule Devices via Supramolecular Control of Quantum Interference. CCS Chemistry. pp. 1-9. ISSN 2096-5745
Full text not available from this repository.Abstract
Developing multifunctional single-molecule devices is a crucial step toward constructing highly integrated molecular circuits. However, it remains challenging due to the difficulty in manipulating the transmission spectra of single-molecule channels that determine the device functionality without altering the channel structures. In this work, we use a supramolecular control strategy to demonstrate the multifunctional single-molecule devices by switching between destructive quantum interference and constructive quantum interference without changing the channel structure. When the electrolyte is switched from a nonimidazolium solution to imidazolium ionic liquid, the devices’ operational behavior transitions from that of an active anti-ambipolar transistor with a high on/off ratio of 120 to that of a passive, gate-insensitive conductor with a negligible field-effect response. Furthermore, we propose two types of single-molecule logic gates with an electrical signal as the output, based on the multifunctional single-molecule devices. Theoretical calculations indicate that the antiresonance transmission of the azulene channel can be manipulated to an off-resonance feature through the electrostatic interaction between imidazolium cations and the azulene ring. Our work provides a nondestructive strategy for designing multifunctional single-molecule devices, which offers new insights into the functional customization and sophisticated logic operations of future molecular circuits.