Xiaotao Zhao
Oligo(aryleneethynylene)s with Terminal Pyridyl Groups: Synthesis and Length Dependence of the Tunnelling to Hopping Transition in Single-Molecule Conductances
Zhao, Xiaotao; Huang, Cancan; Gulcur, Murat; Batsanov, Andrei S.; Baghernejad, Masoud; Hong, Wenjing; Bryce, Martin R.; Wandlowski, Thomas
Authors
Cancan Huang
Murat Gulcur
Andrei S. Batsanov
Masoud Baghernejad
Wenjing Hong
Professor Martin Bryce m.r.bryce@durham.ac.uk
Professor
Thomas Wandlowski
Abstract
The synthesis is reported of a new series of oligo(aryleneethynylene) (OAE) derivatives of up to ca. 6 nm in molecular length (OAE9) using iterative Pd-mediated Sonogashira cross-coupling methodology. The oligo-p-phenyleneethynylene cores of the molecular wires are functionalized at both termini with pyridyl units for attachment to gold leads. The molecular structures determined by single-crystal X-ray analysis are reported for OAE4, OAE5, OAE7, and OAE8a. The charge transport characteristics of derivatives OAE3–OAE9 in single-molecular junctions have been studied using the mechanically controlled break junction technique. The data demonstrate that the junction conductance decreases with increasing molecular length. A transition from coherent transport via tunneling to a hopping mechanism is found for OAE wires longer than ca. 3 nm.
Citation
Zhao, X., Huang, C., Gulcur, M., Batsanov, A. S., Baghernejad, M., Hong, W., …Wandlowski, T. (2013). Oligo(aryleneethynylene)s with Terminal Pyridyl Groups: Synthesis and Length Dependence of the Tunnelling to Hopping Transition in Single-Molecule Conductances. Chemistry of Materials, 25(21), 4340-4347. https://doi.org/10.1021/cm4029484
Journal Article Type | Article |
---|---|
Publication Date | Nov 12, 2013 |
Deposit Date | Nov 24, 2014 |
Publicly Available Date | Nov 26, 2014 |
Journal | Chemistry of Materials |
Print ISSN | 0897-4756 |
Electronic ISSN | 1520-5002 |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 25 |
Issue | 21 |
Pages | 4340-4347 |
DOI | https://doi.org/10.1021/cm4029484 |
Keywords | Molecular electronics, Synthesis, Oligomer, Oligo(aryleneethynylene), Single-molecule conductance, Tunneling, Hopping. |
Public URL | https://durham-repository.worktribe.com/output/1419430 |
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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © 2013 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/cm4029484.
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