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

2. 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

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

4. Materials and methods 2 Extraction of Bacteriorubixanthinal (Brx) - HPLC (High-performance liquid chromatography) http://en.wikipedia.org/wiki/File:Agilent1200HPLC.jpg

5. Results

6. Steady-state spectroscopy 500nm

7. Transient absorption spectra

8. Kinetics    ps

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

10. Thanks for your attention