The modification of reaction centers from Rhodobacter sphaeroides by the introduction of pheophytins instead of bacteriopheophytins leads to interesting changes in the primary photosynthetic reaction: long-living populations of the excited electronic state of the special pair P\* and the bacteriochl
Ultrafast spectroscopy of the primary electron and energy transfer processes in the reaction center of photosystem II
✍ Scribed by A.R. Holzwarth; M.G. Mu¨ller; G. Gatzen; M. Hucke; K. Griebenow
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 470 KB
- Volume
- 60-61
- Category
- Article
- ISSN
- 0022-2313
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Time-resolved spectroscopy in conjunction with magnetic-field-dependent recombination dynamics of the primary radical ion pair in reaction centers of Rb. sphaeroides R26, were used to analyze the mechanism of electron transfer from the bacteriochlorophyll dimer in its excited singlet state ( 'P\*) t
The multipicosecond nonexponential decay of the electronically excited primary electron donor, P \*, observed in isolated photosynthetic reaction centers, is just as readily explained by multistep homogeneous electron transfer as by single-step heterogeneous transfer. With the aid of a one-antenna-s