Dresden 2020 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 32: Poster Session - Organic Molecules on Inorganic Substrates: Adsorption and Growth
O 32.1: Poster
Montag, 16. März 2020, 18:15–20:00, P1C
STM Investigations of Insulating Xenon Interfaces on Silver Surfaces as Low Interaction substrates for Advanced Carbene Studies — •Inga Langguth1, Marvin Quack1, Iris Trosien2, Wolfram Sander2, and Karina Morgenstern1 — 1Chair of Physical Chemistry I, Ruhr-University of Bochum, Germany — 2Chair of Organic Chemistry II, Ruhr-University of Bochum, Germany
The outstanding high reactivity of carbene molecules is of central interest in catalysis and basic research. For the understanding of these reactive intermediates, scanning tunneling microscopy (STM) is a highly favorable technique to gain locally resolved insight into the electronic structure of carbenes and their precursors. For an unperturbed characterization of these molecules, advanced surface decoupling methods are needed, in order to exclude dominating surface influences. Hence, the strategy of this work is to mimic the low interaction conditions between carbenes and their chemical environment as present in rare gas matrices by preparation of an ultra-thin non-conducting rare gas interface. Thus, the consecutive adsorption of xenon (Xe) followed by fluorene based carbene precursors on silver single crystals is investigated by low-temperature STM in ultra-high vacuum. Kinetically restricted precursor molecules are found to dictate the rotational orientation of Xe domains.