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Direct evidence for excitonically coupled chlorophylls a and b in LHC II of higher plants by nonlinear polarization spectroscopy in the frequency domain |
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| Authors: | Maria Krikunova Bernd VoigtHeiko Lokstein |
| Institution: | a Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Str. 2a, D-12489 Berlin, Germany b A.N. Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, Moscow 119899, Russia c Institut für Biologie/Pflanzenphysiologie, Humboldt-Universität zu Berlin, Unter den Linden 6 (Sitz: Philippstr. 13), D-10099 Berlin, Germany |
| Abstract: | Occurrence of excitonic interactions in light-harvesting complex II (LHC II) was investigated by nonlinear polarization spectroscopy in the frequency domain (NLPF) at room temperature. NLPF spectra were obtained upon probing in the chlorophyll (Chl) a/b Soret region and pumping in the Qy region. The lowest energy Chl a absorbing at 678 nm is strongly excitonically coupled to Chl b. |
| Keywords: | Chlorophyll Excitation energy transfer Excitonic interaction LHC II Laser spectroscopy Nonlinear polarization spectroscopy in the frequency domain |
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