Issue 10, 2023

Charge transport of F4TCNQ with different electronic states in single-molecule junctions

Abstract

The molecular conductance of 2,3,5,6-tetrafluoro-7,7,8,8,-tetracyano-quinodimethane (F4TCNQ) with different electronic states (neutral, radical anion, and dianion) was investigated by the scanning tunneling microscope break junction (STM-BJ) technique. These electronic states have distinct conductance, and the conductance decreases in the order of neutral > radical anion > dianion. Surprisingly, the molecular conductance of the neutral F4TCNQ junction reaches 10−1.17G0, attributed to its LUMO energy level being close to the Fermi level of the gold electrode. Moreover, we found that neutral F4TCNQ can be gradually reduced to radical anions under a relatively low bias voltage of 100 mV. These results will advance the development of organic optoelectronic devices and molecule electronics.

Graphical abstract: Charge transport of F4TCNQ with different electronic states in single-molecule junctions

Supplementary files

Article information

Article type
Communication
Submitted
23 Nov 2022
Accepted
04 Jan 2023
First published
05 Jan 2023

Chem. Commun., 2023,59, 1305-1308

Charge transport of F4TCNQ with different electronic states in single-molecule junctions

A. Tang, Y. Li, R. Wang, J. Yang, C. Ma, Z. Li, Q. Zou and H. Li, Chem. Commun., 2023, 59, 1305 DOI: 10.1039/D2CC06341G

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