Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 29: Metal substrates 1
O 29.3: Vortrag
Dienstag, 6. September 2022, 11:00–11:15, S052
Self-assembly and on-surface Ullmann-type polymerisation of a DPP-based molecular wire on Au(111). — •Michael Clarke1, Abigail Bellamy-Carter2, Ferdinando Malagreca3, David B. Amabilino4, and Alexander Saywell1 — 1School of Physics & Astronomy, University of Nottingham, NG7 2RD — 2School of Liberal Arts and Natural Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT — 3School of Chemistry, University of Nottingham, NG7 2RD — 4ICMAB-CSIC, Campus de la UAB 08193 Bellaterra Barcelona, Spain
Diketopyrrolopyrrole (DPP) is a chemical moiety which may act as an electron acceptor within organic electronic-devices and exhibits a high charge carrier mobility. [1] Charge transport within such systems is affected by the local arrangement, and orientation, of molecules/domains; hence controlled formation of ordered structures is of interest. Self-assembly of functionalised DPP species is a route towards ordered structures [2], and on-surface protocols allow monomer units to be covalently coupled under appropriate reaction conditions (e.g. Ullmann-type reactions [3]). Here we study an alkyl chain functionalised DPP unit possessing aryl-hide groups to facilitate on-surface covalent coupling. The self-assembled structure of the monomer units is characterised and ordered polymers, formed via thermal treatment, are investigated using Scanning Tunnelling Microscopy (STM). [1] Y. Li et.al, Energy Environ. Sci., 2013, 6, 1684. Y. Zang et.al, J. Am. Chem. Soc., 2018, 140, 13167. [2] A. Honda et.al , Bull. Chem. Soc. Jpn., 2015, 88, 969.[3] L. Grill & S. Hecht, Nat. Chem., 2020, 12, 115.