Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster Session IV
CPP 46.48: Poster
Mittwoch, 14. März 2018, 11:00–13:00, Poster A
LT-UHV-STM investigations on single benzylnaphthoic diimides adsorbed on metal(111)-surfaces — •Bertram Schulze Lammers1, René Ebeling1, Elena Dirksen2, Thomas J. J. Müller2, and Silvia Karthäuser1 — 1Peter Grünberg Institut (PGI-7) and JARA-FIT, Forschungszentrum Jülich GmbH, Germany — 2Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Germany
LT-UHV-STM investigations allow the detailed characterization of the adsorption behavior and the geometry of 2-dimensional molecules physisorbed on atomically flat surfaces up to their orbital structure. As functionalized naphthalene diimides (NDIs) received current interest due to their possible use as small molecular acceptors for various applications in molecular electronics, we deduced the adsorption behavior and the electronic behavior of these molecular compounds by STM. Here the 2,7-dibenzyl 1,4,5,8-naphthalenetetracarboxylic diimide (BNTCDI), which consist of a large π-conjugated NDI backbone and two benzyl-groups connected to the central part, have been studied as prototypical 3-dimensional NDI compounds. Recent results [1] for BNTCDI on the Pt(111)-surface verified the 3-dimensional structure of the adsorbed molecule with the phenyl groups standing vertically with their phenyl plane on the substrate. In addition to these results the electronic and topographic structure of BNTCDI adsorbed on different (111)-surfaces was investigated in detail and compared to DFT based calculations on BNTCDI in the gas phase and its orbital symmetry of the HOMO and the LUMO. [1] DOI: 10.1021/acs.jpcc.7b09911