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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Experimental Validation of Quantum Circuit Rules in Molecular Junctions
AU - Gorenskaia, E.
AU - Naher, M.
AU - Daukiya, L.
AU - Moggach, S.A.
AU - Costa Milan, D.
AU - Vezzoli, A.
AU - Lambert, C.J.
AU - Nichols, R.J.
AU - Becker, T.
AU - Low, P.J.
PY - 2021/12/31
Y1 - 2021/12/31
N2 - 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. © 2021 Journal Compilation CH21136_TOC.jpg
AB - 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. © 2021 Journal Compilation CH21136_TOC.jpg
KW - alkynes
KW - molecular electronics
KW - quantum interference
KW - Timing circuits
KW - Asymmetric molecules
KW - Experimental validations
KW - Experimental verification
KW - Molecular bridges
KW - Molecular circuits
KW - Molecular junction
KW - Single molecule conductance
KW - Symmetric molecules
KW - Molecules
U2 - 10.1071/CH21136
DO - 10.1071/CH21136
M3 - Journal article
VL - 74
SP - 806
EP - 818
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
SN - 0004-9425
IS - 11
ER -