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ENERGY TRANSFER BETWEEN THE PRIMARY DONOR BACTERIOCHLOROPHYLL AND CAROTENOIDS IN Rhodopseudomonas sphaeroides
Author(s) -
Frank Harry A.,
Machnicki John,
Friesner Richard
Publication year - 1983
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1983.tb03365.x
Subject(s) - bacteriochlorophyll , photosynthetic reaction centre , chemistry , rhodobacter sphaeroides , photochemistry , triplet state , carotenoid , purple bacteria , energy transfer , primary (astronomy) , chemical physics , photosynthesis , electron transfer , molecule , physics , biochemistry , organic chemistry , astronomy
— The temperature dependencies of the primary donor triplet state spectra are presented for the phorosynthetic bacteria Rhodopseudomonas sphaeroides wild type. GIC and R26. The data suggest that energy transfer from the primary donor triplet state to the reaction center carotenoid is dependent on the type of carotenoid present, reversible in the case of strain GIC, and best understood by a model depicting the kinetic processes that can occur between two potential energy surfaces; one representing the state 3 BChl 2 *Car and the other representing BChl 2 3 Car*. Furthermore, it is shown that the onset of spin lattice relaxation in the primary donor triplet is most likely coupled to the same energy vibrational mode as that which promotes triplet state energy transfer from the primary donor to the reaction center carotenoid