TY  - JOUR
A1  - Legall, Herbert
A1  - Stiel, Holger
A1  - Beck, Michael
A1  - Leupold, Dieter
A1  - Gruszecki, Wieslaw I.
A1  - Lokstein, Heiko
T1  - Near edge X-ray absorption fine structure spectroscopy (NEXAFS) of pigment-protein complexes : peridinin- chlorophyll a-protein (PCP) of Amphidinium carterae
N2  - Peridinin-chlorophyll a protein (PCP) is a unique water soluble antenna complex that employs the carotenoid peridinin as the main light-harvesting pigment. In the present study the near edge X-ray absorption fine structure (NEXAFS) spectrum of PCP was recorded at the carbon Kedge. Additionally, the NEXAFS spectra of the constituent pigments, chlorophyll a and peridinin, were measured. The energies of the lowest unoccupied molecular levels of these pigments appearing in the carbon NEXAFS spectrum were resolved. Individual contributions of the pigments and the protein to the measured NEXAFS spectrum of PCP were determined using a "building block" approach combining NEXAFS spectra of the pigments and the amino acids constituting the PCP apoprotein. The results suggest that absorption changes of the pigments in the carbon near K-edge region can be resolved following excitation using a suitable visible pump laser pulse. Consequently, it may be possible to study excitation energy transfer processes involving "optically dark" states of carotenoids in pigment-protein complexes by soft X-ray probe optical pump double resonance spectroscopy (XODR).
Y1  - 2007
UR  - http://www.sciencedirect.com/science/journal/0165022X
U6  - https://doi.org/10.1016/j.jbbm.2006.08.005
SN  - 0165-022X
ER  - 
TY  - THES
A1  - Legall, Herbert
T1  - Laserspektroskopische Untersuchungen zur kollektiven Anregung in J-Aggregaten und deren Einfluß auf die nichtlinearen optischen Eigenschaften
Y1  - 2001
ER  - 
TY  - JOUR
A1  - Leitner, M.
A1  - Glas, P.
A1  - Wrage, M.
A1  - Sandrock, T.
A1  - Legall, Herbert
A1  - Heuer, Axel
A1  - Agostolopoulos, G.
A1  - Herford, J.
A1  - Däweritz, L.
T1  - Mode locked Nd:glass fiber laser using intensity dependent defocusing by low-temperature-grown GaAs
Y1  - 2000
ER  -