Excitation delocalization over the whole core antenna of photosynthetic purple bacteria evidenced by non‐linear pump‐probe spectroscopy

FEBS Letters

Novoderezhkin, Vladimir I.¹  Razjivin, Andrei P.¹ 

[1] International Laser Center, Moscow State University, Moscow 119899, Russian Federation

关键词: Exciton interaction;    Bacterial photosynthesis;    BChl;    bacteriochlorophyll;    RC;    reaction center;    R. rubrum;    Rhodospirillum rubrum;    C. minutissimum;    Chromatium minutissimum;    C. vinosum;    Chromatium vinosum;    C. tepidum;    Chromatium tepidum;    R. viridis;    Rhodopseudomonas viridis;   

DOI  :  10.1016/0014-5793(95)00663-T

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Anomalously high values of photoinduced absorption changes were revealed in the antenna of photosynthetic purple bacteria. They were found to be 4–16 times greater at the bleaching peak of the antenna than at the bleaching peak of the BChl dimer of the reaction center. This is direct proof of excitation delocalization over many pigment molecules. Calculations according to the model of exciton delocalization over all core antenna BChls allow one to explain the observed phenomenon.

【 授权许可】

Unknown