Berlin 2005 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 20: Dynamics II
CPP 20.5: Talk
Tuesday, March 8, 2005, 12:15–12:30, TU C230
Organic monolayers for UV-pump/XUV-probe measurements of molecular dissociation — •Martin Michelswirth1, Peter Siffalovic1, Frank Hamelmann1, Peter Bartz1, Björn Decker2, Olaf Batron2, Thorsten Meyer3, Manfred Neumann3, Jochen Mattay2, Ulrich Heinzmann1, and Markus Drescher1 — 1Molekül und Oberflächenphysik, Fakultät für Physik, Universität Bielefeld — 2Organische Chemie I, Fakultät für Chemie, Universität Bielefeld — 3Elektronenspektroskopie, Fachbereich Physik, Universität Osnabrück
Self-assembled Calixarene-molecules on flat substrates are promising templates for dynamical studies of guest-host-interaction. Attached iodine atoms are removed by selectively breaking bonds with femtosecond UV (266 nm) pulses. The evolution of the iodine dissociation can be followed with time-resolved ESCA utilising femtosecond XUV (13 nm) pulses. Signal quality and temporal resolution depend on an effective control of detrimental effects from multiphoton electron emission. To this end different substrate materials are tested.