Berlin 2015 – wissenschaftliches Programm

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SYOP: Symposium On-Surface Polymerization

SYOP 1: On-surface Polymerization

SYOP 1.4: Hauptvortrag

Montag, 16. März 2015, 16:45–17:15, H 0105

On-surface synthesis with terminal alkynes: towards novel functional nanomaterials — •Florian Klappenberger — Technische Universität München, Physik Department E20

The bottom-up construction of one- (1D) and two-dimensional (2D) molecular nanoarchitectures under ultra-high vacuum conditions is reported with focus on the steps essential for the atom-precise fabrication of covalent hydrocarbon nanomaterials. A comprehensive understanding is obtained by the STM+XS approach[1] combining LT-scanning tunneling microscopy (STM) and X-ray spectroscopy (XS) with density functional theory investigations and all-atom molecular dynamic simulations allowing to precisely characterize the obtained nanostructures and unraveling the underlying formation mechanisms. More specifically, here, we shine light on the on-surface chemistry of terminal alkyne precursors including their self-assembly[2,3] and coupling behavior[4,5] on noble metal surfaces, identify side reaction[6], highlight the significant differences to more reactive substrates[7] and point out templating mechanisms allowing to control the reaction and fabricate regular 1D extended graphdiyne nanowires[8].

[1] F. Klappenberger, Prog. Surf. Sci. 89, 1 (2014). [2] N. Kepcija, et al., J. Phys. Chem. C 117, 3987 (2013). [3] Y.-Q. Zhang, et al., Chem. Commun. 50, 15022 (2014). [4] Y.-Q. Zhang, Nat. Commun. 3, 1286 (2012). [5] J. Björk et al., J. Phys. Chem. C 118, 3181 (2014). [6] B. Cirera, et al., ChemCatChem 5, 3281 (2013). [7] Y.-Q. Zhang, et al., under revision in J. Am. Chem. Soc. [8] B. Cirera, et al., Nano Lett. 14, 1891 (2014).