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Self-assembled monolayers of Ru/Os dinuclear complexes: probing monolayer structure and interaction energies by electrochemical means

Figgemeier, E. and Constable, Edwin C. and Housecroft, Catherine E. and Zimmermann, Y. C.. (2004) Self-assembled monolayers of Ru/Os dinuclear complexes: probing monolayer structure and interaction energies by electrochemical means. Langmuir, 20 (21). pp. 9242-9248.

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Official URL: http://edoc.unibas.ch/39197/

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Abstract

Monolayers of [Ru(bPY)(2)(mu-1)M(2)][PF6](4) salts (M = Os, Ru; bpy = 2,2`-bipyridine, 1 = 4`-(2,2`-bipyridin-4-yl)-2,2`:6`,2``-terpyridine, tpy = 2,2`:6`,2``-terpyridine, and 2= 4`-(4-pyridyl)-2,2`:6`,2``-terpyridine) were self-assembled on platinum and investigated by fast-scan electrochemistry. The electrochemistry of the complexes in solution and confined to the surface in self-assembled monolayers (SAMs) exhibited an almost ideal behavior. Scan-rate-dependent measurements of the peak current density (j(p)) were used to determine interaction energies within the monolayer. It is shown that the tpy coordination sites of the dinuclear complexes interact more strongly within the SAM than the bipyridine-coordinated fragments. This result was supported by peak potential shifts, which are due to interaction forces in SAMs. The alignment of the rodlike complexes relative to the surface is discussed, and the results of molecular mechanics calculations indicate that the species adopt a tilted orientation.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Constable)
05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Housecroft)
UniBasel Contributors:Constable, Edwin Charles
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
ISSN:0743-7463
e-ISSN:1520-5827
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:12 Apr 2017 08:51
Deposited On:03 Feb 2016 09:26

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