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Stretching-Induced Conductance Increase in a Spin-Crossover Molecule

Frisenda, Riccardo and Harzmann, Gero D. and Celis Gil, Jose A. and Thijssen, Joseph M. and Mayor, Marcel and van der Zant, Herre S. J.. (2016) Stretching-Induced Conductance Increase in a Spin-Crossover Molecule. Nano Letters, 16 (8). pp. 4733-4737.

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Official URL: http://edoc.unibas.ch/52066/

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Abstract

We investigate transport through mechanically triggered single-molecule switches that are based on the coordination sphere-dependent spin state of FeII-species. In these molecules, in certain junction configurations the relative arrangement of two terpyridine ligands within homoleptic FeII-complexes can be mechanically controlled. Mechanical pulling may thus distort the FeII coordination sphere and eventually modify their spin state. Using the movable nanoelectrodes in a mechanically controlled break-junction at low temperature, current–voltage measurements at cryogenic temperatures support the hypothesized switching mechanism based on the spin-crossover behavior. A large fraction of molecular junctions formed with the spin-crossover-active FeII-complex displays a conductance increase for increasing electrode separation and this increase can reach 1–2 orders of magnitude. Theoretical calculations predict a stretching-induced spin transition in the FeII-complex and a larger transmission for the high-spin configuration.
Faculties and Departments:05 Faculty of Science
05 Faculty of Science > Departement Chemie > Chemie > Molecular Devices and Materials (Mayor)
UniBasel Contributors:Mayor, Marcel and Harzmann, Gero
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
ISSN:1530-6984
e-ISSN:1530-6992
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:18 Jan 2017 15:13
Deposited On:18 Jan 2017 15:13

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