title: Towards the engineering of molecular nanostructures: local anchoring and functionalization of porphyrins on model-templates.
abstract: We demonstrate that Cu(111) surfaces pre-covered with a submonolayer of copper oxide or metallic nickel are suitable model-templates for the selective adsorption and/or localized functionalization of functional molecules such as different free base porphyrins and metalloporphyrins. The oxide/Cu(111) model-template is able to steer the adsorption of tetraphenylporphyrins (TPP): 2HTPP selectively adsorbs on the bare Cu areas, and for CoTPP anchoring at the rim of the copper oxide islands is found. On the Ni/Cu(111) model-template TPP molecules are pinned on the Ni areas while they are mobile on the bare Cu surface. Interestingly, adsorption of free base octaethylporphyrin on Ni/Cu(111) leads to a local functionalization, namely the metalation to NiOEP on the Ni areas. Model-template preparation and characterization by scanning tunneling microscopy is performed at room temperature.
authors: Lehrstuhl für Physikalische Chemie II and Interdisciplinary Center for Molecular Materials (ICMM), Universität Erlangen-Nürnberg, Erlangen, Germany.
authors: Stefanie
authors: S
authors: Ditze
authors: Michael
authors: M
authors: Röckert
authors: Florian
authors: F
authors: Buchner
authors: Elisabeth
authors: E
authors: Zillner
authors: Michael
authors: M
authors: Stark
authors: Hans-Peter
authors: HP
authors: Steinrück
authors: Hubertus
authors: H
authors: Marbach