Dresden 2011 – wissenschaftliches Programm

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ISS: Intersectional Sessions

ISS 5: Transport and Spectroscopy in Molecular Nanostructures I (CPP, MO, related to SYMN)

ISS 5.2: Vortrag

Mittwoch, 16. März 2011, 14:15–14:30, ZEU 160

Single molecule fluorescence-excitation and emission spectroscopy on the same individual light harvesting 2 complexes from Rps. acidophila 10050 — •Ralf Kunz¹, Kõu Timpmann², Arvi Freiberg², Richard J. Cogdell³, and Jürgen Köhler¹ — ¹Experimental Physics IV, University of Bayreuth — ²Institute of Physics, University of Tartu — ³Institute of Molecular, Cell & Systems Biology College of Medical, Veterinary and Life Sciences, University of Glasgow

Fluorescence-excitation and emission spectra from the same individual light harvesting 2 complexes from Rps. acidophila strain 10050 measured at low temperature will be presented. The combination of both spectroscopic techniques provides information about the absorbing and emitting electronic states within the same LH2 complex.
To our surprise we find different types of emission spectra (with/without zero-phonon line) which do not correlate with different types of fluorescence-excitation spectra. The shape of the emission spectra, however, shows a clear correlation with the spectral position.