Berlin 2015 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 20: Inorganic/Organic Interfaces: Growth III
O 20.5: Vortrag
Dienstag, 17. März 2015, 11:30–11:45, MA 005
Self assembly of amino substituted carbonyl bridged triarylamines — •Maximilian Ammon1, Tim Sander1, Patrick Seitz1, Christian Steiner1, Milan Kivala2, and Sabine Maier1 — 1Department of Physics, FAU Erlangen-Nürnberg, Germany — 2Department of Chemistry and Pharmacy, FAU Erlangen-Nürnberg, Germany
Triarylamine derivatives are versatile building blocks for a variety of application-oriented molecular structures including organic field effect transistors [1] and optolelectronic devices [2]. Here we present a scanning tunneling and non-contact atomic force microscopy study at low temperatures on the self-assembly of triarylamines with amino and carbonyl functional groups. Self-assembled porous networks are expected to form due to the hydrogen-bonding motif, which we observe on Au(111). Its structure will be discussed based on scanning tunneling hydrogen microscopy [3] measurements. The self-assembly strongly depends on the surface reactivity and the molecule-surface interaction. Scanning tunneling microscopy measurements on Cu(111) also show a porous network, but indicate a binding motif based on metal ligand interaction. In contrast, the molecules adopt a nearly upright adsorption geometry, stabilized by intermolecular π - π -interactions, on KBr(001).
[1] K. Schmoltner et al., Polym. Chem. 4, 5337-5344 (2013).
[2] C. Liu et al., Chem. Eur. J. 18, 6928-6934 (2012).
[3] Weiss, C. et al., PRL 105, 086103 (2010).