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Int. J. Mol. Sci. 2013, 14(3), 4498-4524; doi:10.3390/ijms14034498

Molecular Self-Assembly at Metal-Electrolyte Interfaces

1,*  and 1,2,*
1 Institute of Physical and Theoretical Chemistry, University of Bonn, Wegelerstr, 12, D-53115 Bonn, Germany 2 Institute of Experimental Physics, Plaza Maxa Borna 9, 50-204 Wroclaw, Poland
* Authors to whom correspondence should be addressed.
Received: 8 January 2013 / Revised: 10 February 2013 / Accepted: 16 February 2013 / Published: 25 February 2013
(This article belongs to the Special Issue Molecular Self-Assembly 2012)
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The self-assembly of molecular layers has become an important strategy in modern design of functional materials. However, in particular, large organic molecules may no longer be sufficiently volatile to be deposited by vapor deposition. In this case, deposition from solution may be a promising route; in ionic form, these molecules may even be soluble in water. In this contribution, we present and discuss results on the electrochemical deposition of viologen- and porphyrin molecules as well as their co-adsorption on chloride modified Cu(100) and Cu(111) single crystal electrode surfaces from aqueous acidic solutions. Using in situ techniques like cyclic voltametry and high resolution scanning tunneling microscopy, as well as ex-situ photoelectron spectroscopy data the highly ordered self-assembled organic layers are characterized with respect to their electrochemical behavior, lateral order and inner conformation as well as phase transitions thereof as a function of their redox-state and the symmetry of the substrate. As a result, detailed structure models are derived and are discussed in terms of the prevailing interactions.
Keywords: self-assembly; porphyrin; viologen; cyclic voltammogram; scanning tunneling microscopy; X-ray photoelectron spectroscopy self-assembly; porphyrin; viologen; cyclic voltammogram; scanning tunneling microscopy; X-ray photoelectron spectroscopy
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Phan, T.H.; Wandelt, K. Molecular Self-Assembly at Metal-Electrolyte Interfaces. Int. J. Mol. Sci. 2013, 14, 4498-4524.

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