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Berlin 2018 – scientific programme

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O: Fachverband Oberflächenphysik

O 96: Focus Session: Molecular Nanostructures on surfaces - New Concepts towards Complex Architectures VI

O 96.2: Talk

Thursday, March 15, 2018, 15:15–15:30, MA 004

On-surface Metalation of the Salophene Ligand and Investigations of local Electronic Properties — •Micha Elsebach1, Julia Goedecke1, Emil Sierda1,2, Marta Przychodnia2, Maciej Bazarnik1,2, and Roland Wiesendanger11Dept. of Physics, University of Hamburg, D-20355 Hamburg, Germany — 2Institute of Physics, Poznan University of Technology, Piotrowo 3, 60-965 Poznan, Poland

Due to their electronic and magnetic properties in combination with their versatility, molecular systems promise high potential for future application in spintronic devices. Previously we showed that Co-salophenes can be used for the fabrication of an all-spin-based logic gate on Au(111) [1]. However, the Co-atoms within the salophene ligand are in the second oxidation state and therefore carry only spin 1/2. Other metal centers will have a different spin state and therefore might present stronger magnetic coupling within a chain of molecules created by the Ullmann coupling.

The chemical synthesis of complexes based on the salophene ligand in solution is a difficult task that bears the problem of getting a clean sample of the desired complex. Therefore, we performed on-surface metalation of an empty salophene ligand terminated with two H-atoms. During this procedure the creation of counter ions and other secondary products is highly improbable. Here, we present STM and STS studies on the on-surface metalated molecules, and their ex situ synthesized counterparts.

[1] M. Bazarnik et al., Nano Lett. 16, 577 (2016).

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