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O: Fachverband Oberflächenphysik

O 86: Nanostructure at Surfaces: Molecular Assembly

O 86.1: Hauptvortrag

Donnerstag, 19. März 2015, 15:00–15:30, HE 101

On-surface synthesis of molecular and polymeric nanostructures — •J. Michael Gottfried — Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany

The on-surface synthesis of organic molecules, organometallic compounds, and two-dimensional polymeric networks is an increasingly popular field of study in surface science and holds promise as an approach for surface modification and functionalization. Surface reactions in ultrahigh vacuum can produce novel molecular compounds which are not accessible by conventional synthesis in solution or which are too large or too reactive for vapor deposition. Catalytic and template effects exerted by the surface can help driving the reaction into the desired direction. In this contribution, recent advances in the on-surface synthesis of large molecular species and two-dimensional polymeric structures will be reviewed. Prominent examples include conjugated hydrocarbon macrocycles such as hyperbenzene and its homologues, which are synthesized by the surface-assisted Ullmann reaction. This reaction also provides access to cyclic and linear organometallic structures. Related topics that will be covered include strategies for the synthesis of low-defect covalent networks through the on-surface synthesis of suitable molecular building blocks and the role of side products for structure formation.