Volume 18, Issue 20 2200361
Research Article

Transport Modulation Through Electronegativity Gating in Multiple Nitrogenous Circuits

Ping Duan

Ping Duan

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Yaping Wang

Yaping Wang

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Lichuan Chen

Lichuan Chen

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Kai Qu

Kai Qu

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 P. R. China

School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Junyang Liu

Corresponding Author

Junyang Liu

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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Qian-Chong Zhang

Corresponding Author

Qian-Chong Zhang

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 P. R. China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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Zhong-Ning Chen

Corresponding Author

Zhong-Ning Chen

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 P. R. China

School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210 P. R. China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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Wenjing Hong

Corresponding Author

Wenjing Hong

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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First published: 15 April 2022

Abstract

Investigating the correlations of electron transport between multiple channels shows vital promises for the design of molecule-scale circuits with logic operations. To control the electron transport through multiple channels, the modulation of electronegativity shows an effective frontier orbit control method with high universality to explore the interactions between transport channels. Here, two series of compounds with a single nitrogenous conductive channel (Sg) and dual-channels (Db) are designed to explore the influence of electronegativity on electron tunneling transport. Single-molecule conductance measured via the scanning tunneling microscope break junction technique (STM-BJ) reveals that the conductance of Db series is significantly suppressed as the electronegativity of nitrogen becomes negative, while the suppression on Sg is less obvious. Theoretical calculations confirm that the effect of electronegativity extends to a dispersive range of molecular frameworks owing to the delocalized orbital distribution from the dual-channel structure, resulting in a more significant conductance suppression effect than that on the single-channel. This study provides the experimental and theoretical potentials of electronegativity gating for molecular circuits.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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