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Thermoelectric Properties of 2,7-Dipyridylfluorene Derivatives in Single-Molecule Junctions

Yzambart, Gilles; Rincón-García, Laura; Al-Jobory, Alaa A.; Ismael, Ali K.; Rubio-Bollinger, Gabino; Lambert, Colin J.; Agraït, Nicolás; Bryce, Martin R.

Thermoelectric Properties of 2,7-Dipyridylfluorene Derivatives in Single-Molecule Junctions Thumbnail


Authors

Gilles Yzambart

Laura Rincón-García

Alaa A. Al-Jobory

Ali K. Ismael

Gabino Rubio-Bollinger

Colin J. Lambert

Nicolás Agraït



Abstract

A series of 2,7-dipyridylfluorene derivatives have been synthesized with different substituents (2H, 2Me, 2OMe, 2CF3, and O) at the C(9) position. Experimental measurements on gold|single-molecule|gold junctions, using a modified scanning tunneling microscope-break-junction technique, show that the C(9) substituent has little effect on the conductance, although there is a more significant influence on the thermopower, with the Seebeck coefficient varying by a factor of 1.65 within the series. The combined experimental and computational study, using density functional theory calculations, provides insights into the interplay of conductance and thermopower in single-molecule junctions and is a guide for new strategies for thermopower modulation in single-molecule junctions.

Citation

Yzambart, G., Rincón-García, L., Al-Jobory, A. A., Ismael, A. K., Rubio-Bollinger, G., Lambert, C. J., …Bryce, M. R. (2018). Thermoelectric Properties of 2,7-Dipyridylfluorene Derivatives in Single-Molecule Junctions. Journal of Physical Chemistry C, 122(48), 27198-27204. https://doi.org/10.1021/acs.jpcc.8b08488

Journal Article Type Article
Online Publication Date Nov 21, 2018
Publication Date Dec 6, 2018
Deposit Date Nov 28, 2018
Publicly Available Date Nov 21, 2019
Journal Journal of Physical Chemistry C
Print ISSN 1932-7447
Electronic ISSN 1932-7455
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 122
Issue 48
Pages 27198-27204
DOI https://doi.org/10.1021/acs.jpcc.8b08488
Public URL https://durham-repository.worktribe.com/output/1313206

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of physical chemistry C copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.8b08488






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