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Carbazole‐Based Tetrapodal Anchor Groups for Gold Surfaces: Synthesis and Conductance Properties

Bryce, Martin Robert; O'Driscoll, Luke; Wang, Xintai; Jay, Michael; Batsanov, Andrei; Sadeghi, Hatef; Lambert, Colin; Robinson, Benjamin

Carbazole‐Based Tetrapodal Anchor Groups for Gold Surfaces: Synthesis and Conductance Properties Thumbnail


Authors

Luke O'Driscoll

Xintai Wang

Michael Jay

Andrei Batsanov

Hatef Sadeghi

Colin Lambert

Benjamin Robinson



Abstract

As the field of molecular‐scale electronics matures and the prospect of devices incorporating molecular wires becomes more feasible, it is necessary to progress from the simple anchor groups used in fundamental conductance studies to more elaborate anchors designed with device stability in mind. This study presents a series of oligo(phenylene‐ethynylene) wires with one tetrapodal anchor and a phenyl or pyridyl head group. The new anchors are designed to bind strongly to gold surfaces without disrupting the conductance pathway of the wires. Conductive probe atomic force microscopy (cAFM) was used to determine the conductance of self‐assembled monolayers (SAMs) of the wires in Au−SAM−Pt and Au−SAM−graphene junctions, from which the conductance per molecule was derived. For tolane‐type wires, mean conductances per molecule of up to 10 −4.37 G 0 (Pt) and 10 −3.78 G 0 (graphene) were measured, despite limited electronic coupling to the Au electrode, demonstrating the potential of this approach. Computational studies of the surface binding geometry and transport properties rationalise and support the experimental results.

Citation

Bryce, M. R., O'Driscoll, L., Wang, X., Jay, M., Batsanov, A., Sadeghi, H., …Robinson, B. (2020). Carbazole‐Based Tetrapodal Anchor Groups for Gold Surfaces: Synthesis and Conductance Properties. Angewandte Chemie International Edition, 59(2), 882-889. https://doi.org/10.1002/anie.201911652

Journal Article Type Article
Acceptance Date Nov 12, 2019
Online Publication Date Nov 27, 2019
Publication Date Jan 7, 2020
Deposit Date Nov 13, 2019
Publicly Available Date Nov 27, 2020
Journal Angewandte Chemie International Edition
Print ISSN 1433-7851
Electronic ISSN 1521-3773
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 59
Issue 2
Pages 882-889
DOI https://doi.org/10.1002/anie.201911652
Public URL https://durham-repository.worktribe.com/output/1283548

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Copyright Statement
© 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.





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