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O: Fachverband Oberflächenphysik

O 58: Poster Session III (Solid/liquid interfaces; Metals; Semiconductors; Oxides and insulators)

O 58.7: Poster

Wednesday, March 28, 2012, 18:15–21:45, Poster B

Shape-persistent linear oligomers. — •Robert May, Stefan-Sven Jester, and Sigurd Höger — Rheinische Friedrich-Wilhelms-Universität Bonn, Kekulé-Institut für Organische Chemie und Biochemie, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany

Conjugated shape-persistent arylene-alkynylene oligomers are discussed as one-dimensional molecular wires and as building blocks for supramolecular materials as well as for two-dimensional adlayers on surfaces. Oligomerization reactions and subsequent recycling gel permeation chromatography for separation of the crude products allow an efficient acces to monodisperse oligomers of distinct oligomerization degree in sufficient quantities. Here we present an approach towards monodisperse shape-persistent oligo(phenylene-butadiynylene)s of up to 38 nm length. Self-assembled monolayers of these molecules at the liquid/solid interface (here: 1,2,4-trichlorobenzene/HOPG) are investigated by scanning tunneling microscopy.