Asymmetry Induction by Cooperative Intermolecular Hydrogen Bonds in Surface‐Anchored Layers of Achiral Molecules
- 2 October 2006
- journal article
- Published by Wiley in Chemphyschem
- Vol. 7 (10), 2197-2204
- https://doi.org/10.1002/cphc.200600110
Abstract
The mesoscale induction of two‐dimensional supramolecular chirality (formation of 2D organic domains with a single handedness) was achieved by self‐assembly of 1,2,4‐benzenetricarboxylic (trimellitic) acid on a Cu(100) surface at elevated temperatures. The combination of spectroscopic [X‐ray photoelectron spectroscopy (XPS) and near‐edge X‐ray absorption fine structure (NEXAFS)], real‐space‐probe [scanning tunneling microscopy (STM)], and computational [density functional theory (DFT)] methods allows a comprehensive characterization of the obtained organic adlayers, where details of molecular adsorption geometry, intermolecular coupling, and surface chemical bonding are elucidated. The trimellitic acid species, comprising three functional carboxylic groups, form distinct stable mirror‐symmetric hydrogen‐bonded domains. The chiral ordering is associated with conformational restriction in the domains: molecules anchor to the substrate with an ortho carboxylate group, providing two para carboxylic acid moieties for collective lateral interweaving through H bonding, which induces a specific tilt of the molecular plane. The ease of molecular symmetry switching in domain formation makes homochiral‐signature propagation solely limited by the terrace width. The molecular layer modifies the morphology of the underlying copper substrate and induces μm‐sized strictly homochiral terraces.Keywords
This publication has 77 references indexed in Scilit:
- Bestimmung der absoluten Konfiguration adsorbierter MoleküleAngewandte Chemie, 2004
- Chirality Transfer from Single Molecules into Self‐Assembled MonolayersAngewandte Chemie International Edition, 2003
- Chirality Transfer from Single Molecules into Self‐Assembled MonolayersAngewandte Chemie, 2003
- Chiral recognition in dimerization of adsorbed cysteine observed by scanning tunnelling microscopyNature, 2002
- Naturally Chiral Metal Surfaces as Enantiospecific AdsorbentsThe Journal of Physical Chemistry B, 2001
- Self-directed growth of molecular nanostructures on siliconNature, 2000
- Extended surface chirality from supramolecular assemblies of adsorbed chiral moleculesNature, 2000
- Surface Reactivity at “Chiral” Platinum SurfacesLangmuir, 1999
- Spontaneous Chiral Segregation in Bidimensional FilmsPhysical Review Letters, 1995
- NEXAFS SpectroscopyPublished by Springer Nature ,1992