13C Photo-CIDNP MAS NMR Studies on Oriented Reaction Centers
In order to study the orientation dependence of photochemically induced dynamic nuclear polarization (photo-CIDNP) occurring photosynthetic reaction centers of Rhodobacter sphaeroides, magic-angle spinning (MAS) NMR has been applied to both, isotropic and oriented RC samples. The sample orientation is obtained by magic-angle oriented sample spinning (MAOSS). In contrast to original expectations, experiments and simulations show that the orientation obtained in MAOSS experiments does not induce significant spectral effects in the polarization pattern.
KeywordsPhoto-CIDNP MAS NMR electron transfer
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