DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2015 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

O: Fachverband Oberflächenphysik

O 41: Inorganic/Organic Interfaces

O 41.47: Poster

Tuesday, March 17, 2015, 18:15–21:00, Poster B

Light-induced ring-closure isomerization of a diarylethene derivate in direct contact with surfaces — •Fabian Nickel1, Matthias Bernien1, Sandro Wrzalek1, Martin Herder2, Pantelis Chittas1, Kai Kraffert1, Lucas M. Arruda1, Lalminthang Kipgen1, Stefan Hecht2, and Wolfgang Kuch11Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, 14195 Berlin — 2Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin

The photochromic isomerization of molecules in direct contact with solid surfaces can be important for the further miniaturization of molecular electronic devices. A potential candidate for this purpose is T-DAE, a diarylethene derivate with attached phenyl groups. This molecule can be switched reversibly between two metastable states in solution. In the closed-ring configuration, a conjugated conduction path through the molecule exists, making it interesting for photochromic switching of the electronic interaction between two attached end groups. In-situ X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) experiments performed on T-DAE adsorbed on Bi(111), Au(111), and highly oriented pyrolytic graphite (HOPG) revealed a UV-light-induced ring-closure reaction on Bi(111) and HOPG. Spectroscopy of the sulfur 2p core electrons shows the existence of three different species of molecules after light exposure, pointing towards the presence of a byproduct that is known to exhibit no reversible switching.

This work is supported by the DFG through Sfb 658.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2015 > Berlin