Skip to main content

Research Repository

Advanced Search

Heteroatom-Induced Molecular Asymmetry Tunes Quantum Interference in Charge Transport through Single-Molecule Junctions

Yang, Yang; Gantenbein, Markus; Alqorashi, Afaf; Wei, Junying; Sangtarash, Sara; Hu, Duan; Sadeghi, Hatef; Zhang, Rui; Pi, Jiuchan; Chen, Lichuan; Huang, Xiaoyan; Li, Ruihao; Liu, Junyang; Shi, Jia; Hong, Wenjing; Lambert, Colin J.; Bryce, Martin R.

Heteroatom-Induced Molecular Asymmetry Tunes Quantum Interference in Charge Transport through Single-Molecule Junctions Thumbnail


Authors

Yang Yang

Markus Gantenbein

Afaf Alqorashi

Junying Wei

Sara Sangtarash

Duan Hu

Hatef Sadeghi

Rui Zhang

Jiuchan Pi

Lichuan Chen

Xiaoyan Huang

Ruihao Li

Junyang Liu

Jia Shi

Wenjing Hong

Colin J. Lambert



Abstract

We studied the interplay between quantum interference (QI) and molecular asymmetry in charge transport through a single molecule. Eight compounds with five-membered core rings were synthesized, and their single-molecule conductances were characterized using the mechanically controllable break junction technique. It is found that the symmetric molecules are more conductive than their asymmetric isomers and that there is no statistically significant dependence on the aromaticity of the core. In contrast, we find experimental evidence of destructive QI in five-membered rings, which can be tuned by implanting different heteroatoms into the core ring. Our findings are rationalized by the presence of antiresonance features in the transmission curves calculated using nonequilibrium Green’s functions. This novel mechanism for modulating QI effects in charge transport via tuning of molecular asymmetry will lead to promising applications in the design of single-molecule devices.

Citation

Yang, Y., Gantenbein, M., Alqorashi, A., Wei, J., Sangtarash, S., Hu, D., …Bryce, M. R. (2018). Heteroatom-Induced Molecular Asymmetry Tunes Quantum Interference in Charge Transport through Single-Molecule Junctions. Journal of Physical Chemistry C, 122(26), 14965-14970. https://doi.org/10.1021/acs.jpcc.8b03023

Journal Article Type Article
Acceptance Date Mar 30, 2018
Online Publication Date Jul 5, 2018
Publication Date Jul 5, 2018
Deposit Date Jul 31, 2018
Publicly Available Date Jul 31, 2018
Journal Journal of Physical Chemistry C
Print ISSN 1932-7447
Electronic ISSN 1932-7455
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 122
Issue 26
Pages 14965-14970
DOI https://doi.org/10.1021/acs.jpcc.8b03023

Files

Accepted Journal Article (3.7 Mb)
PDF

Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in the Journal of physical chemistry C copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.8b03023





You might also like



Downloadable Citations