Volume 42, Issue 11 pp. 1217-1222
Concise Report

Regularly Tuning Quantum Interference in Single-Molecule Junctions through Systematic Substitution of Side Groups with Varied Electron Effects

Xianjing Xie

Xianjing Xie

Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Street, Hangzhou, Zhejiang, 310018 China

Thess authors contributed equally.

Dedicated to the Special Issue of Emerging Investigators in 2023.

Search for more papers by this author
Yirong Zhang

Yirong Zhang

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022 China

School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094 China

Thess authors contributed equally.

Dedicated to the Special Issue of Emerging Investigators in 2023.

Search for more papers by this author
Junrui Zhang

Junrui Zhang

Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Street, Hangzhou, Zhejiang, 310018 China

Thess authors contributed equally.

Dedicated to the Special Issue of Emerging Investigators in 2023.

Search for more papers by this author
Xingyuan Cui

Xingyuan Cui

Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Street, Hangzhou, Zhejiang, 310018 China

Search for more papers by this author
Wei Liu

Corresponding Author

Wei Liu

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022 China

E-mail: [email protected]; [email protected]Search for more papers by this author
Xunshan Liu

Corresponding Author

Xunshan Liu

Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Street, Hangzhou, Zhejiang, 310018 China

E-mail: [email protected]; [email protected]Search for more papers by this author
First published: 06 February 2024
Citations: 2

Comprehensive Summary

Investigating the quantum interference effect in single molecules is essential to comprehensively understand the underlying mechanism of single-molecule charge transport. In this study, we employed the mother molecule m-OPE and introduced a series of side groups with various electronic effects at the 2-position of the central phenyl ring, creating four daughter m-OPE derivatives. The single molecular conductivities of these molecule wires were measured using the scanning tunneling microscope breaking junction technique. Our findings demonstrate that the substitutions regularly modulate the destructive quantum interference occurring within the m-OPE molecules. By combining optical and electrochemical investigations, along with density functional theory computations, we discover that the conductivity of the molecules corresponds to the electron-donating/withdrawing ability of the substituents. Specifically, by adjusting the electron structures of the molecular backbone, we can systematically tailor the destructive quantum interference in the m-OPE molecules. image

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.