Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 45: Organic-Inorganic Hybrid Systems and Organic Films
O 45.7: Poster
Dienstag, 21. März 2017, 18:30–20:30, P1A
Manipulation of H2Pc tautomerization by multi-atom structures — •Markus Leisegang1, Jens Kügel1, Andreas Krönlein1, Markus Böhme1, and Matthias Bode1,2 — 1Physikalisches Institut, Experimentelle Physik II, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2Wilhelm Conrad Röntgen Center for Complex Material Systems (RCCM), Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
Recent scanning tunneling microscopy (STM) studies showed that the switching behavior of hydrogen protons between different molecular sites, a so-called tautomerization, can be influenced by a molecule–substrate symmetry mismatch [1] or by the proximity of a single atom [2]. Here, we will show how the controlled switching behavior of a single H2Pc molecule and its dehydrogenated form can be modified by nanostructures assembled in an atom-by-atom process. Towards this goal we developed an experimental procedure that allows for the highly controllable release of single atoms from silver STM tips onto a Ag(111) surface. Manipulating these adatoms facilitates the creation of various molecular environments that reduce or amplify the tautomerization processes.
[1] J. Kügel et. al., ACS Nano (DOI: 10.1021/acsnano.6b05924).
[2] T. Kumagai et. al., Nat. Chem., 6, 41-46 (2014).