Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 21: POSTERS Colloids, Nanoparticles and Aggregates
CPP 21.8: Poster
Mittwoch, 27. Februar 2008, 16:00–18:30, Poster A
Molecular Self-Organisation of Fréchet-Dendrons Probed by STM — C. Rohr1, K. Gruber1, M. Malarek2, L. J. Scherer2, C. E Housecroft2, E. C. Constable2, and •B. A. Hermann1 — 1Dept. of Physics / CeNS, LMU Munich and WMI, Walther-Meissner-Str. 8, 85748 Garching, Germany — 2Dept. of Chemistry, Uni. of Basel, Spitalstrasse 51, 4056 Basel, Switzerland
Self-organised molecular layers provide a promising route to constructing new (switchable) nanodevices and optimising nanosensors. The design of suitable molecules involves the control of structure and stabilisation on the surface as well as the control of chemical functionality. The synthesis of molecules bearing functionality and at the same time exhibiting excellent self-organization properties is tedious and time consuming. Hence, the search for a potentially universal "adapter", that can control the self-organisation and stabilisation on a particular type of surface, is a worthwhile challenge. High-resolution nanoscale imaging using scanning tunnelling microscopy (STM) provides the means to significantly advance such studies. How powerfully Fréchet-dendrons can affect various central components (catalytic, switchable, redox-active) on a graphite surface is addressed by analysing self-organised monolayers of nine different molecules, each containing at least one first or second-generation Fréchet-type dendron. The arrangement of the molecules in the monolayer on the surface can further be influenced by small structural changes of the Fréchet-type dendron.