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Letter

Coexistence of Racemic and Homochiral Two-Dimensional Lattices Formed by a Prochiral Molecule: Dicarboxystilbene on Cu(110)

Roc

o Cort

s^†, Arantzazu Mascaraque^†, Philipp Schmidt-Weber^‡, Hugo Dil^‡, Thorsten U. Kampen^‡^§ and Karsten Horn*^‡

Departamento F

sica de Materiales, Universidad Complutense de Madrid, Madrid, Spain, and Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany

Nano Lett., 2008, 8 (12), pp 4162–4167

DOI: 10.1021/nl801592c

Publication Date (Web): November 20, 2008

Copyright © 2008 American Chemical Society

†

Universidad Complutense de Madrid.

,

‡

Fritz-Haber-Institut der Max-Planck-Gesellschaft.

,

Now at University of Zurich, Switzerland.

,

§

Now at SPECS GmbH, Berlin.

,

* Corresponding author: horn@fhi-berlin.mpg.de.

Abstract

Abstract Image

Dicarboxystilbene, a molecule that becomes chiral in the adsorbed state through the loss of its improper axis of rotation, forms long-range “handed” structures when adsorbed on Cu(110) as revealed by scanning tunnelling microscopy. We show that these structures are created from chiral “adsorption complex” building blocks, giving rise to a complete set of racemic and enantiomerically pure structural assemblies. We interpret the formation of these structures in terms of a balance between hydrogen bond mediated intermolecular interactions and the adsorbate−surface structural relationship and discuss the reasons for temperature-induced conversion from the metastable enantiomerically pure to the racemic structure.

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History

Published In Issue December 10, 2008
Article ASAPNovember 20, 2008
Received: June 04, 2008
Revised: October 29, 2008

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