Experimental Validation of Quantum Circuit Rules in Molecular Junctions*

Gorenskaia, Elena, Naher, Masnun, Daukiya, Lakshya, Moggach, Stephen A, Milan, David Costa ORCID: 0000-0002-2077-7920, Vezzoli, Andrea ORCID: 0000-0002-8059-0113, Lambert, Colin J, Nichols, Richard J ORCID: 0000-0002-1446-8275, Becker, Thomas and Low, Paul J
(2021) Experimental Validation of Quantum Circuit Rules in Molecular Junctions*. AUSTRALIAN JOURNAL OF CHEMISTRY, 74 (11). pp. 806-818.

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<jats:p>A series of diarylacetylene (tolane) derivatives functionalised at the 4- and 4′-positions by thiolate, thioether, or amine groups capable of serving as anchor groups to secure the molecules within a molecular junction have been prepared and characterised. The series of compounds have a general form X-B-X, Y-B-Y, and X-B-Y where X and Y represent anchor groups and B the molecular bridge. The single-molecule conductance values determined by the scanning tunnelling microscope break-junction method are found to be in excellent agreement with the predictions made on the basis of a recently proposed ‘molecular circuit law’, which states ‘the conductance CH21136_IE1.gif of an asymmetric molecule X-B-Y is the geometric mean CH21136_IE2.gif of the conductance of the two symmetric molecules derived from it, CH21136_IE3.gif and CH21136_IE4.gif.’ The experimental verification of the circuit law, which holds for systems in which the constituent moieties X, B, and Y are weakly coupled and whose conductance takes place via off-resonance tunnelling, gives further confidence in the use of this relationship in the design of future compounds for use in molecular electronics research.</jats:p>

Item Type: Article
Uncontrolled Keywords: molecular electronics, quantum interference, alkynes
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 01 Nov 2021 11:34
Last Modified: 19 Mar 2023 03:48
DOI: 10.1071/CH21136
Open Access URL: https://www.publish.csiro.au/CH/fulltext/CH21136
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3142364