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Conductance of ‘bare-bones’ tripodal molecular wires

Davidson, Ross J.; Milan, David C.; Al-Owaedi, Oday A.; Ismael, Ali K.; Nichols, Richard J.; Higgins, Simon J.; Lambert, Colin J.; Yufit, Dmitry S.; Beeby, Andrew

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Authors

David C. Milan

Oday A. Al-Owaedi

Ali K. Ismael

Richard J. Nichols

Simon J. Higgins

Colin J. Lambert



Abstract

Controlling the orientation of molecular conductors on the electrode surfaces is a critical factor in the development of single-molecule conductors. In the current study, we used the scanning tunnelling microscopy-based break junction (STM-BJ) technique to explore ‘bare-bones’ tripodal molecular wires, employing different anchor groups (AGs) at the ‘top’ and ‘bottom’ of the tripod. The triarylphosphine tris(4-(methylthio)phenyl)phosphine and its corresponding phosphine sulfide showed only a single high conductance feature in the resulting 1- and 2-dimensional conductance histograms, whereas analogous molecules with fewer than three thiomethyl AGs did not show clear conductance features. Thus, by systematic molecular modifications and with the aid of supporting DFT calculations, the binding geometry, with respect to the surface, was elucidated.

Citation

Davidson, R. J., Milan, D. C., Al-Owaedi, O. A., Ismael, A. K., Nichols, R. J., Higgins, S. J., …Beeby, A. (2018). Conductance of ‘bare-bones’ tripodal molecular wires. RSC Advances, 8(42), 23585-23590. https://doi.org/10.1039/c8ra01257a

Journal Article Type Article
Acceptance Date Jun 18, 2018
Online Publication Date Jun 28, 2018
Publication Date Jun 28, 2018
Deposit Date Jun 24, 2018
Publicly Available Date Jun 25, 2018
Journal RSC Advances
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 8
Issue 42
Pages 23585-23590
DOI https://doi.org/10.1039/c8ra01257a

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