Berlin 2001 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 17: Poster: Spectroscopy and Single Particle Spectroscopy of Molecular Systems, Photoprocesses, Biological Systems
CPP 17.16: Poster
Dienstag, 3. April 2001, 12:30–15:00, AT1
Low Temperature Spectroscopy of Single Antenna Complexes of Higher Plants — •Sebastian Schuler1, Fedor Jelezko1, Carsten Tietz1, Uwe Gerken1, Britta Götze1, Axel Schubert2, Heiko Lokstein2, Henriette Wolf3, and Jörg Wrachtrup1 — 13. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart, Germany — 2Institut für Biologie, Humboldt-Universität zu Berlin, 10099 Berlin, Germany — 3Institut für Allgemeine Botanik, Universität Mainz, 55099 Mainz, Germany
In photosynthesis about 50 with the LHC-II complex being one of the most abundant proteins on earth. Its main task is to capture sunlight and funnel the absorbed energy to the reaction center where charge separation takes place. Nevertheless, the energy migration within the antenna is still under debate.
Low temperature (T = 2K) fluorescence emission spectroscopy of single LHC-II monomers and trimers has been carried out. Polarization depending emission spectra lead to the conclusion of more than one state responsible for fluorescence. This is probably due to either dramatically changes of the photophysical properties of the pigments or due to large spectral jumps caused by conformational changes of the protein environment.