Dresden 2014 – scientific programme
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O: Fachverband Oberflächenphysik
O 97: Organic/bio Molecules on Metal Surfaces IV
O 97.5: Talk
Friday, April 4, 2014, 11:30–11:45, TRE Phy
Steering on-surface polymerization of dibromopyrene on metal substrates — •Fei Song1, Tuan Anh Pham1, Jonas Bjork2, and Meike Stöhr1 — 1Zernike Institute for Advanced Materials, University of Groningen, the Netherlands — 2Department of Physics Chemistry and Biology, Linkoping University, Sweden
Self-assembly of functional molecular building blocks into supramolecular structures has attracted a wealth of attention in the past due to its potential usage in molecular devices [1]. However, a drawback of such regular nanostructures is, due to their comparably weak intermolecular interactions, poor thermal and chemical stability. Consequently, robust structures with covalently bonded architectures have attracted much attention as a new alternative route towards the design of nanostructures [2]. Herein, we discuss the formation of stable molecular networks on different metal substrates through on-surface polymerization of the molecular precursor dibromopyrene. The investigations were carried out by using a combination of scanning tunneling microscopy, x-ray photoemission spectroscopy, and density functional theory. We demonstrate that the surface-confined polymerization can be steered by the chosen substrate. [1] Schenning, A. P. H. J.; Meijer, E. W. Chem. Commun. 2005, 26, 3245. [2] Grill, L.; Dyer, M.; Lafferentz, L.; Persson, M.; Peters, M. V.; Hecht, S. Nature Nanotech. 2007, 2, 687.