Triazatriangulenium adlayers on Au(111): Superstructure as a function of alkyl side chain length

The structure of organic adlayers, formed by self-assembly of molecular platforms of triazatriangulenium ions on Au(111), was systematically studied by scanning tunneling microscopy as a function of the length of the lateral ligands for alkyl side chains from propyl to dodecyl. A series of hexagonal...

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Bibliographic Details
Published in:Surface science 2015-02, Vol.632, p.71-76
Main Authors: Lemke, Sonja, Ulrich, Sandra, Claußen, Frauke, Bloedorn, Andreas, Jung, Ulrich, Herges, Rainer, Magnussen, Olaf M.
Format: Article
Language:English
Subjects:
Bonding
Chains
Lattices
Ligands
Platforms
Scanning tunneling microscopy
Self assembly
Self-assembled monolayers
Superstructures
TATA platform
Triazatriangulenium
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Summary:The structure of organic adlayers, formed by self-assembly of molecular platforms of triazatriangulenium ions on Au(111), was systematically studied by scanning tunneling microscopy as a function of the length of the lateral ligands for alkyl side chains from propyl to dodecyl. A series of hexagonally-ordered adlayers with spacings from 10.7Å (propyl) to 13.6Å (dodecyl) was found which are commensurate to the Au(111) substrate lattice, indicating localized bonding of the molecules to the metal. [Display omitted] •Systematic STM study of triazatriangulenium platform adlayers•Stepwise change of intermolecular spacing with increasing alkyl chain length•Adlayer structures indicate strongly localized adsorption.•Reduction of alkyl-surface interaction due to geometric constrains
ISSN:0039-6028
1879-2758
DOI:10.1016/j.susc.2014.08.028