Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 71: Poster Wednesday: Adsorption and Catalysis

O 71.5: Poster

Mittwoch, 3. April 2019, 17:45–20:00, Poster B2

Addressing individual redox states of single polyoxovanadate molecules — •Marco Moors1, Oliver Linnenberg2, and Kirill Yu. Monakhov31Peter Grünberg Institut, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße, 52425 Jülich — 2Institut für Anorganische Chemie, RWTH Aachen, Landoltweg 1, 52074 Aachen — 3Leibniz-Institut für Oberflächenmodifizierung, Permoserstraße 15, 04318 Leipzig

Polyoxometalates (POM) offer a great potential for future applications in the fields of catalysis, sensors or molecular data storage. An outstanding property of POM consisting of vanadium ions is the ability of the latter to transit between multiple stable redox states, without affecting the structural integrity of the molecule [1]. In this study we present a model approach for tailoring and testing tris(alkoxo)-terminated Lindqvist-type POM as operational units for (multi-)resistive switching memories. This POM class is characterized by a rather small negative molecular charge of its fully-oxidized species and can be easily derivatized with different organic ligands. By applying an external potential we were able to demonstrate the controlled addressing of individual redox states of a single molecule adsorbed on an Au(111) surface at room temperature [3].

[1] K. Y. Monakhov et al., Adv. Inorg. Chem. 69 (2017) 251; [2] D. Li et al., J. Am. Chem. Soc. 133 (2011) 14010; [3] O. Linnenberg et al., J. Am. Chem. Soc. DOI: 10.1021/jacs.8b08780 (2018).

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