| Autor: |
Gerald J. Small, Stephen V. Kolaczkowski, N. Raja S. Reddy |
| Rok vydání: |
1993 |
| Předmět: |
|
| Zdroj: |
Science (New York, N.Y.). 260(5104) |
| ISSN: |
0036-8075 |
| Popis: |
Structural modification of photosynthetic reaction centers is an important approach for understanding their charge-separation processes. An unprecedented persistent structural transformation of the special pair (dimer) of bacteriochlorophyll molecules can be produced by light absorption alone. The nonphotochemical hole-burned spectra for the reaction center of Rhodopseudomonas viridis show that the phototransformation leads to a red shift of 150 wave numbers for the special pair's lowest energy absorption band, P960, and a comparable blue shift for a state at 850 nanometers, which can now be definitively assigned as being most closely associated with the upper dimer component. Additional insights on excited-state electronic structure include the identification of a new state. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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