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Student: Jan Česal Leader: Václav Šlouf

27 . 07. 2011. Student: Jan Česal Leader: Václav Šlouf. Effect of the Solvent Environment on Excited-State Properties of an U ntypical Carotenoid. Hu et al., PNAS 1998. S 2. t 2. Q x. t ET. S 1. Q y. t 1. S 0. S 0. Bacteriochlorophyll. Bacteriorubixanthinal. Motivation.

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Student: Jan Česal Leader: Václav Šlouf

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

  2. Hu et al., PNAS 1998 S2 t2 Qx tET S1 Qy t1 S0 S0 Bacteriochlorophyll Bacteriorubixanthinal Motivation • earlier measurements onLH1-RC of AAP(Aerobic Anoxygenic Phototrophic) bacteria tc = 0.6 ps t1 = ... will be the result of this study tET = ?

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

  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. 500nm Steady-state spectroscopy

  7. Transient absorption spectra

  8. t1 = 3.4 ps Kinetics

  9. S2 Qx tET= 0.73 ps S1 Qy t1= 3.4 ps S0 S0 Brx BChl Conclusions - We measured t1 - We calculated tET

  10. Thanks for your attention

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