Conductance of 'bare-bones' tripodal molecular wires

Davidson, Ross J. and Milan, David C. and Al-Owaedi, Oday A. and Ismael, Ali K. and Nichols, Richard J. and Higgins, Simon J. and Lambert, Colin J. and Yufit, Dmitry S. and Beeby, Andrew (2018) Conductance of 'bare-bones' tripodal molecular wires. RSC Advances, 8 (42). pp. 23585-23590. ISSN 2046-2069

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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.

Item Type:
Journal Article
Journal or Publication Title:
RSC Advances
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1500
Subjects:
ID Code:
137671
Deposited By:
Deposited On:
09 Oct 2019 10:25
Refereed?:
Yes
Published?:
Published
Last Modified:
25 Mar 2020 03:31