Systematic Experimental Study of Quantum Interference Effects in Anthraquinoid Molecular Wires

M. Carlotti, S. Soni, X. Qiu, E. Sauter, M. Zharnikov, R.C. Chiechi*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

15 Citations (Scopus)
23 Downloads (Pure)

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 at the 9 and 10 positions that affect the energies and localization of their frontier orbitals. We compared the experimental results across three different experimental platforms in both single-molecule and large-area junctions and found a 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.
Original languageEnglish
Pages (from-to)2018-2028
JournalNanoscale Advances
Volume1
Issue number5
DOIs
Publication statusPublished - 7 Feb 2019
Externally publishedYes

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