Self-Assembled Trimer Structures Highlight the Competitive Roles of Intermolecular and Adsorbate–Substrate Interactions: PVBA Trimer on Pd(111)

Self-Assembled Trimer Structures Highlight the Competitive Roles of Intermolecular and Adsorbate–Substrate Interactions: PVBA Trimer on Pd(111)

We observed the orientation of 4-trans-2-(pyrid-4-yl-vinyl)benzoic acid (PVBA) trimers on Pd(111) using scanning tunneling microscopy (STM) under ultrahigh vacuum (UHV). The image showed three different types of trimers, one of which does not follow predicted dimer orientations. This type of trimer...

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Veröffentlicht in:Langmuir 2012-05, Vol.28 (21), p.8010-8016
Hauptverfasser: Kim, Byung I, Kim, Soomin
Format: Artikel
Sprache:eng
Schlagworte:
Adsorption
Chemistry
Exact sciences and technology
General and physical chemistry
Microscopy, Scanning Tunneling
Molecular Structure
Palladium - chemistry
Particle Size
Styrenes - chemistry
Surface Properties
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Zusammenfassung:We observed the orientation of 4-trans-2-(pyrid-4-yl-vinyl)benzoic acid (PVBA) trimers on Pd(111) using scanning tunneling microscopy (STM) under ultrahigh vacuum (UHV). The image showed three different types of trimers, one of which does not follow predicted dimer orientations. This type of trimer displays 10° rotations of each molecule in clockwise or counterclockwise directions. Calculations of adsorbate–substrate energy and hydrogen bonding energy revealed that the rotations are a result of competition between adsorbate–adsorbate and adsorbate–substrate interactions.
ISSN:0743-7463
1520-5827
DOI:10.1021/la301563u