Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 14: Organic/bio Molecules on Metal Surfaces II

O 14.4: Talk

Monday, March 31, 2014, 16:45–17:00, TRE Phy

Adsorption geometry and intramolecular conformation of Ni(II)-tetraphenyl-benzoporphyrin on Cu(111) — •Liang Zhang, Michael Lepper, Michael Stark, Stefanie Ditze, Hans-Peter Steinrück, and Hubertus Marbach — Lehrstuhl für PhysikalischeChemie II and Interdisciplinary Center for Molecular Materials (ICMM), Universität Erlangen-Nürnberg, Egerlandstr. 3, D-91058

Self-assembly of molecular building blocks on well-defined surfaces by supramolecular coordination provides a promising approach for the bottom-up fabrication of two-dimensional nanostructures with outstanding properties. In this respect, porphyrins are particularly attractive because of their distinct chemical and physical properties.

In this presentation, we expand our scanning tunneling microscopy studies to the adsorption of Ni(II)-tetraphenyl-benzoporphyrin (NiTPBP) on Cu(111) under ultra-high vacuum (UHV) conditions, mainly at room temperature (RT). NiTPBP shows a peculiar interesting adsorption behavior with coexisting domains of different supramolecular structure and individual molecules exhibiting deviant orientation within a particular supramolecular arrangement. The observed supramolecular assemblies, the corresponding intermolecular interactions and the dynamic behavior of the molecules will be discussed in detail.