Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory
O 36.35: Poster
Dienstag, 1. April 2014, 18:30–22:00, P1
Towards the formation of extended polycyclic aromatic hydrocarbons doped with nitrogen — •Tim Sander1, Maximilian Ammon1, Philipp Hofmann1, Natalie Hammer2, Milan Kivala2, and Sabine Maier1 — 1Department of Physics, University of Erlangen-Nürnberg, Germany — 2Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Germany
The formation of extended polycyclic aromatic hydrocarbons (PAHs) by on-surface synthesis on metal surfaces has recently attracted increased interest owing to the current developments in the field of building new carbon allotropes in a bottom-up approach. We used planarized triarylamine molecules functionalized with diphenylmethylidene side groups and end groups of different types (e.g. alkylchains and trialkylsilyl moieties) as molecular building blocks. We investigated the potential of the functionalized triarylamine molecules to undergo a cyclodehydrogenation reaction on the Au(111) and Cu(111) surface to create novel extended PAHs doped with nitrogen heteroatoms. The thermal-stability of the different functional side and end groups as well as the adsorption configuration of the individual molecules will be discussed in detail by means of low temperature scanning tunneling microscopy under ultra-high vacuum condition.