SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 47: Poster Session IV: Organic molecules on inorganic substrates: networks and overlayers
O 47.2: Poster
Dienstag, 2. März 2021, 13:30–15:30, P
Metalation of 2HTCNPP on Ag(111) with Zn - evidence for the sitting atop complex at room temperature — •Jan Kuliga1, Rodrigo Cezar de Campos Ferreira2, Rajan Adhikari1, Stephen Massicot1, Michael Lepper1, Helen Hölzel3, Norbert Jux3, Hubertus Marbach1, Abner de Siervo2, and Hans-Peter Steinrück1 — 1Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany — 2Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, 13083-859, SP, Brazil — 3Organische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nikolaus-Fiebiger-Str. 10, 91058 Erlangen, Germany
Using STM at RT, we study the adsorption of the free base 2HTCNPP on Ag(111), and its metalation to ZnTCNPP by post-deposition of Zn atoms. The goal is to obtain further insights in the metalation reaction and the influence of the cyanogroups on this reaction. The interaction of 2HTCNPP with post-deposited Zn leads to the formation of three different 2D ordered island types that coexist on the surface. All contain a new species with a bright appearance, which increases with the amount of post-deposited Zn. We attribute this to metastable SAT (*sitting atop*) complexes formed by Zn and the macrocycle, that is, an intermediate in the metalation reaction to ZnTCNPP, which occurs upon heating to 500 K. Interestingly, the activation barrier for the successive reaction of the SAT complex to the metalated ZnTCNPP species can also be overcome by a voltage pulse applied to the STM tip.