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Systematic Experimental Study of Quantum Interference Effects in Anthraquinoid Molecular Wires

Abstract

In order to translate molecular properties in molecular-electronic devices, it is necessary to create design principles that can be used to achieve better structure-function control oriented toward device fabrication. In molecular tunneling junctions, cross-conjugation tends to give rise to destructive quantum interference effects that can be tuned by changing the electronic properties of the molecules. We performed a systematic study of the tunneling charge-transport properties of a series of compounds characterized by an identical cross-conjugated anthraquinoid molecular skeleton but bearing different substituents in the 9 and 10 position that affect the energies and localization of their frontier orbitals. We compared experimental results across three different experimental platforms in both single-molecule and large-area junctions, finding general agreement. Combined with theoretical models, these results separate the intrinsic properties of the molecules from platform-specific effects. This work is a step towards explicit synthetic control over tunneling charge-transport targeted at specific functionality in (proto-)devices.

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Publication details

The article was received on 18 Sep 2018, accepted on 07 Feb 2019 and first published on 07 Feb 2019


Article type: Paper
DOI: 10.1039/C8NA00223A
Citation: Nanoscale Adv., 2019, Accepted Manuscript
  • Open access: Creative Commons BY license
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    Systematic Experimental Study of Quantum Interference Effects in Anthraquinoid Molecular Wires

    M. Carlotti, S. Soni, X. Qiu, E. Sauter, M. Zharnikov and R. Chiechi, Nanoscale Adv., 2019, Accepted Manuscript , DOI: 10.1039/C8NA00223A

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