The triplet state in bacterial photosynthesis: Possible mechanisms of the primary photo-act

AUTOR(ES)

Thurnauer, Marion C.

RESUMO

In vitro and in vivo triplet state electron paramagnetic resonance (epr) spectra of bacteriochlorophylls (Bchls) show important differences in (a) electron spin polarization (esp), and (b) zero field splitting (ZFS) parameters. The unusual esp and ZFS properties of the observed in vivo triplet state are best interpreted as arising from a short-lived radical pair precursor (not directly observable by epr) formed in or with the special pair of bacteriochlorophyll molecules involved in the primary photo-act.

Documentos Relacionados

• Primary charge separation in bacterial photosynthesis: oxidized chlorophylls and reduced pheophytin.
• Primary acceptor in bacterial photosynthesis: obligatory role of ubiquinone in photoactive reaction centers of Rhodopseudomonas spheroides.
• Magnetic characterization of the primary state of bacterial photosynthesis
• Physical mechanisms in photosynthesis: past elucidations and current problems.
• Magnetic resonance spectroscopy of the primary state, PF, of bacterial photosynthesis