Regensburg 2007 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 15: Poster Session
DS 15.4: Poster
Dienstag, 27. März 2007, 15:00–17:00, Poster B
Light induced oxidative switching of anthracene monolayers — •Burkhard Stiller1, Werner Fudiker2, Fred Albrecht1, Stephan Katholy1, Torsten Linker2, and Dieter Neher1 — 1Universität Potsdam, Institut für Physik, Potsdam, Deutschland — 2Universität Potsdam, Institut für Chemie, Potsdam, Deutschland
We present studies on the reversible photooxygenation of anthracene monolayers. Dioxygen can reversibly be added to anthracene derivatives by the photoinduced self-sensitised formation of singlet oxygen affording the corresponding anthracene endoperoxides. A quantitative reconversion to the parent anthracene is achieved either by heating or irradiation with UV-light. Calculations suggest significant changes of the molecular geometry and the dipole moments of the used anthracene derivatives upon oxidation. This reversible light induced change of the molecular dipole moment was monitored on-line by Kelvin probe technique and ellipsometry on anthracene monolayers. We have further employed this approach to establish a new method for eversible light and air driven lithography.