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O: Fachverband Oberflächenphysik

O 64: Organic Molecules on Inorganic Substrates IV: Adsorption, Growth and Networks

O 64.9: Hauptvortrag

Mittwoch, 18. März 2020, 12:30–13:00, TRE Phy

On-surface Chemical Reactions of Heterocycles for Functional Nanomaterials — •Shi-Xia Liu — Department of Chemistry and Biochemistry, University of Bern, Switzerland

On-surface chemical reactions are of high interest and have been intensively investigated in order to obtain carbon-based functional nanomaterials which very often can not be synthesized by wet chemistry. Thus, tailor-made heterocyclic precursors are becoming quite crucial in the development of highly symmetric 2D-conjugated porous architectures and N-doped graphene nanoribbons (GNRs) with desired functions due to their intrinsic electronic properties. This presentation focuses on our collaborative work on self-assembly and C-C coupling reactions on different surfaces leading to the formation of a range of nanostructures including small clusters,1 molecular wires,2 fully fused porphyrin-GNR hybrids3 and 2D-conjugated porous networks with Kagome characteristics.4 All these atomically precise nanostructures can be directly visualized by scanning tunneling microscopy (STM) and noncontact atomic force microscopy (nc-AFM). Their electronic properties can be fine-tuned by chemical modification and will be discussed.

References 1. N. Kocic et al., J. Am. Chem. Soc. 2016, 138, 5585-5593. 2. S. Karan et al., Angew. Chem. Int. Ed. 2019, submitted. 3. L. M. Mateo et al., Angew. Chem. Int. Ed. 2019, DOI: 10.1002/anie.201913024. 4. R. Pawlak et al., manuscript in preparation.