Single-Molecule Junction Conductance through Diaminoacenes

Abstract

The study of electron transport through single molecules is essential to the development of molecular electronics. Indeed, trends in electronic conductance through organic nanowires have emerged with the increasing reliability of electron transport measurements at the single-molecule level. Experimental and theoretical work has shown that tunneling distance, HOMO-LUMO gap and molecular conformation influence electron transport in both saturated and pi-conjugated nanowires. However, there is relatively little experimental data on electron transport through fused aromatic rings. Here we show using diaminoacenes that conductivity depends not only on the number of fused aromatic rings in the molecule, which defines the molecular HOMO-LUMO gap, but also on the position of the amino groups on the rings. Specifically, we find that conductance is highest with minimal disruption of aromaticity in fused aromatic nanowires.

2 pages, 3 figures

References in corpus (4)

• Dependence of Single Molecule Junction Conductance on Molecular Conformation
• Electron transmission through molecules and molecular interfaces
• Single-Molecule Circuits with Well-Defined Molecular Conductance
• Electronics and Chemistry: Varying Single Molecule Junction Conductance Using Chemical Substituents

Cited by in corpus (5)

• Advances and challenges in single-molecule electron transport
• Amine-Linked Single Molecule Circuits: Systematic Trends Across Molecular Families
• Breakdown of Interference Rules in Azulene, a Non-Alternant Hydrocarbon
• Conductance saturation in a series of highly transmitting molecular junctions
• Tailoring the Fermi level of the leads in molecular-electronic devices