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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )

O 36.14: Poster

Dienstag, 12. März 2013, 18:15–21:45, Poster B2

Glaser coupling at metal surfaces — •Hongying Gao¹, Hendrik Wagner², Dingyong Zhong¹, Armido Studer², and Harald Fuchs¹ — ¹Physikalisches Institut Muenster university,Wilhelm-Klemm-Straße 10, 48149 Münster — ²Organisch-Chemisches Institut,Westfälische Wilhelms-Universität Münster,Corrensstraße 40, 48149 Münster

the Glaser coupling can be used highly efficiently to generate linear oligomer / polymer chains in spatial confinement at surfaces, which is impossible in conventional solution schemes. The generation of π-conjugated linear polymers directly at the interface is possible by using appropriate precursors and subsequent on-surface-coupling. It turned out that the Glaser coupling worked most efficiently on Ag(111) surfaces, as compared with Au(111) and Cu(111). The surface acts as a 2D supporting system that lets the molecules adsorb and orient in a plane, and may also mediate the reactions. The substitution pattern of the organic precursor molecules is also of great importance and simple steric shielding of the alkyne led to a suppression of side reactions. We believe that the approach presented herein is not restricted to the formation of π-conjugated linear chains but also allows for the formation of defined π-conjugated two-dimensional networks.