Accession Number : ADP008260

Title :   Hole Burning of the Exciton Coupled Antenna Complex of Rhodobacter Sphaeroides,

Corporate Author : IOWA STATE UNIV AMES

Personal Author(s) : Reddy, N. R. ; Small, G. J.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Efficient energy transfer in light harvesting (LH) complexes forms an important part of the photosynthetic process that results in the conversion of light energy into chemical free energy. A number of factors are important for understanding the process that directs the optical excitation to the reaction center. Included are the nature of relevant excited states of chlorophylls (e.g. localised or delocalised), bath induced mechanisms for homogeneous broadening of transitions etc. The Q sub y-absorption (S sub 1) of chlorophyllic molecules in protein complexes appears as inhomogeneously broadened bands with Gamma sub I approx. 50 - 200/cm at liquid helium temperatures.

Descriptors :   *PHOTOSYNTHESIS, *MOLECULAR SPECTROSCOPY, ABSORPTION, CHEMICALS, CHLOROPHYLLS, CONVERSION, ENERGY, ENERGY TRANSFER, EXCITATION, FREE ENERGY, HELIUM, LIGHT, LIQUID HELIUM, MOLECULES, PROTEINS, TEMPERATURE, TRANSFER, TRANSITIONS, ANTENNAS.

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Industrial Chemistry and Chemical Processing

Distribution Statement : APPROVED FOR PUBLIC RELEASE