Bild des Monats Juni 2021
Let it click on silicon
Organic architectures on silicon surfaces may lead to new applications beyond the possibilities of standard silicon technology (“more than Moore”). Two different routes were recently developed for the first steps of synthesizing such architectures on the highly reactive Si(001) surface which is seen through the window of a UHV apparatus. In both cases, the surface was first functionalized in UHV via chemoselective adsorption of cyclooctyne derivatives. A second organic layer was then either coupled via a UHV-compatible click chemistry reaction based on enolether/tetrazine coupling as sketched in the image. Alternatively, alkyne-azide coupling was efficiently performed after transferring the sample directly from UHV into the reactive solution. The work was performed in a close collaboration between the groups of Ulrich Koert (Organic Chemistry, Philipps University Marburg), Ralf Tonner (Theoretical Chemistry, University Leipzig), and Michael Dürr (Applied Physics, JLU Giessen); it opens the route to synthesizing complex organic architectures on silicon.
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