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

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• 作者：Roco Corts ; Arantzazu Mascaraque ; Philipp Schmidt-Weber ; Hugo Dil ; Thorsten U. Kampen ; Karsten Horn
• 刊名：Nano Letters
• 出版年：2008
• 出版时间：December 10, 2008
• 年：2008
• 卷：8
• 期：12
• 页码：4162-4167
• 全文大小：307K
• 年卷期：v.8,no.12(December 10, 2008)
• ISSN：1530-6992

文摘

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.