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O: Fachverband Oberflächenphysik

O 26: Organic-inorganic hybrid systems and organic films III

O 26.1: Vortrag

Dienstag, 13. März 2018, 10:30–10:45, MA 042

Self-assembly and metal coordination of 1,4-bis(1h-tetrazol-5-yl)benzene on Ag(111) in vacuo — •Peter Knecht¹, Anthoula Papageorgiou¹, Bodong Zhang¹, Joachim Reichert¹, Nithin Suryadevara², Svetlana Klyatskaya², Mario Ruben², and Johannes Barth¹ — ¹Physics Department E20, Technical University of Munich, Garching D-85748, Germany — ²Institute for Nanotechnology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen D-76344, Germany

A phenyl functionalized with two tetrazole moieties at para positions is promising for magnetically active metal-organic coordination networks [1]. This route can be potentially extended to polyphenyls, which would result in linear tuning of the separation of the magnetically active metal atoms in the network [2-3]. En route to prepare such surface supported networks, we investigated the self-assembly and metal coordination of 1,4-bis(1h-tetrazol-5-yl)benzene on the atomically smooth Ag(111) surface under UHV conditions. The molecular layers are prepared by organic molecular beam epitaxy. Scanning tunneling microscopy and X-ray photoelectron spectroscopy are used to investigate the assembly of the molecules and their chemical state. The coordination of the tetrazole moieties with the native Ag adatoms is observed after annealing to 160 °C, whereas coordination with magnetically active Fe3+ atoms is achieved upon codeposition and annealing to ~120 °C.

[1] Yan, Zheng et al. Chem. Commun. 48 (2012) 3960

[2] Schlickum, U. et al. Nano Lett. 7 (2007) 3813

[3] Kühne, Dirk et al. JACS 131 (2009) 3881