Single-molecule junctions of multinuclear organometallic wires: long-range carrier transport brought about by metal–metal interaction

Yuya Tanaka; Yuya Kato; Kaho Sugimoto; Reo Kawano; Tomofumi Tada; Shintaro Fujii; Manabu Kiguchi; Munetaka Akita

doi:10.1039/D0SC06613C

Single-molecule junctions of multinuclear organometallic wires: long-range carrier transport brought about by metal–metal interaction†‡

Yuya Tanaka,

*^ab Yuya Kato,^ab Kaho Sugimoto,^ab Reo Kawano,^ab Tomofumi Tada,^c Shintaro Fujii,

^d Manabu Kiguchi

^d and Munetaka Akita

*^ab

Author affiliations

* Corresponding authors

^a Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
E-mail: ytanaka@res.titech.ac.jp, akitatit@icloud.com

^b Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

^c Kyushu University Platform of Inter/Transdisciplinary Energy Research, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan

^d Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan

Abstract

Here, we report multinuclear organometallic molecular wires having (2,5-diethynylthiophene)diyl-Ru(dppe)₂ repeating units. Despite the molecular dimensions of 2–4 nm the multinuclear wires show high conductance (up to 10⁻² to 10⁻³G₀) at the single-molecule level with small attenuation factors (β) as revealed by STM-break junction measurements. The high performance can be attributed to the efficient energy alignment between the Fermi level of the metal electrodes and the HOMO levels of the multinuclear molecular wires as revealed by DFT–NEGF calculations. Electrochemical and DFT studies reveal that the strong Ru–Ru interaction through the bridging ligands raises the HOMO levels to access the Fermi level, leading to high conductance and small β values.

Supplementary files

Article information

DOI: https://doi.org/10.1039/D0SC06613C
Article type: Edge Article
Submitted: 03 Dec 2020
Accepted: 07 Feb 2021
First published: 08 Feb 2021
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry

Download Citation

Chem. Sci., 2021,12, 4338-4344

Permissions

Request permissions

Single-molecule junctions of multinuclear organometallic wires: long-range carrier transport brought about by metal–metal interaction

Y. Tanaka, Y. Kato, K. Sugimoto, R. Kawano, T. Tada, S. Fujii, M. Kiguchi and M. Akita, Chem. Sci., 2021, 12, 4338 DOI: 10.1039/D0SC06613C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Chemical Science

Single-molecule junctions of multinuclear organometallic wires: long-range carrier transport brought about by metal–metal interaction†‡

Abstract

Supplementary files

Article information

Download Citation

Permissions

Single-molecule junctions of multinuclear organometallic wires: long-range carrier transport brought about by metal–metal interaction

Social activity

Search articles by author

Spotlight

Advertisements