Student: Jan Česal Leader: Václav Šlouf Effect of the Solvent Environment on Excited-State Properties of an Untypical Carotenoid 27. 07. 2011.

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Presentation transcript:

Student: Jan Česal Leader: Václav Šlouf Effect of the Solvent Environment on Excited-State Properties of an Untypical Carotenoid

Motivation -earlier measurements on LH1-RC of AAP (Aerobic Anoxygenic Phototrophic) bacteria Bacteriorubixanthinal Bacteriochlorophyll S0S0 S0S0 S2S2 S1S1 QyQy QxQx    ET Hu et al., PNAS 1998  c = 0.6 ps  ET = ?  1 =... will be the result of this study

Materials and methods Pump–probe spectroscopy -110 fs -1 kHz Pump Crystal Laser system Delay line Light converter Sample Probe Spectrograph

Materials and methods 2 Extraction of Bacteriorubixanthinal (Brx) - HPLC (High-performance liquid chromatography)

Results

Steady-state spectroscopy 500nm

Transient absorption spectra

Kinetics    ps

Conclusions - We measured  1 - We calculated  ET BrxBChl S0S0 S0S0 S2S2 S1S1 QyQy QxQx   = 3.4 ps  ET = 0.73 ps

Thanks for your attention