SOLVENT EFFECTS ON TRIPLET‐STATE BACTERIOCHLOROPHYLL a AS DETECTED BY TRANSIENT RAMAN SPECTROSCOPY AND THE ENVIRONMENT OF BACTERIOCHLOROPHYLL a IN THE LIGHT‐HARVESTING COMPLEX OF Rhodobacter sphaeroides R26
| Main Authors: | Ei‐ichi, Nishizawa, Leenawaty, Limantara, Noriyuki, Nanjou, Hiroyoshi, Nagae, Tomisaburo, Kakuno, Yasushi, Koyama |
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| Format: | Article PeerReviewed Book |
| Bahasa: | eng |
| Terbitan: |
Wiley-Blackwell
, 1994
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| Subjects: | |
| Online Access: |
http://eprints.upj.ac.id/id/eprint/75/1/j.1751-1097.1994.tb05027.x http://eprints.upj.ac.id/id/eprint/75/ https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1751-1097.1994.tb05027.x |
Daftar Isi:
- The frequenct of the ring-breathing (Ca―Cm stretching) Raman line of bacteriochlorophyll a (BChl) in the T1 state (abbreviated as vr") was determined in 16 different solvents. The vr" frequencies were in the region of 1578-1581 cm-1 in polar solvents forming the hexa-coordinated monomers, while they were in the region of 1585-1591 cm-1 in polar solvents forming the penta-coordinated monomers. The vr" frequencies were 1597 and 1599 cm-1 in methylene chloride and carbon tetrachloride forming penta-coordinated BChl aggregates. Possible mechanisms in which the vr" frequency reflects the states of intermolecular interactions are discussed. The vr" frequency of BChl that was bound to the light-harvesting complex (LHC) of Rhodobacter sphaeroides R26 was found to be 1598 cm-1, a result which suggests that a pair of BChl molecules form a dimer in the LHC in the T1 state.