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Energy Transfer at 1.5 K in Some Photosynthetic Bacteria Monitored by Microwave‐Induced Fluorescence (MIF) Spectra
Author(s) -
Hoff A. J.,
De Vries H. Gorter
Publication year - 1981
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.198100051
Subject(s) - chemistry , photosynthetic reaction centre , microwave , fluorescence , spectral line , photochemistry , energy transfer , antenna (radio) , acceptor , photosynthesis , pigment , wavelength , analytical chemistry (journal) , rhodobacter sphaeroides , purple bacteria , electron transfer , nuclear magnetic resonance , molecular physics , optics , physics , condensed matter physics , computer science , telecommunications , biochemistry , organic chemistry , quantum mechanics , astronomy , chromatography
With an optically detected magnetic resonance technique, Microwave Induced Fluorescence difference (MIF) spectra have been recorded at 1.5 K for a number of photosynthetic bacteria under reducing conditions. It is found that the MIF spectra coincide with the longest wavelength fluorescence band. A relation for energy transfer at very low temperature is derived, leading to a ( r 0 R ) −3 dependence of the rate of energy transfer on the distance r 0 of closest approach of donor and acceptor pigment and the diameter 2R of the antenna complex. It is tentatively concluded that the photochemical trap in the photosynthetic reaction center has a distribution of 0‐0 transitions similar to that of the antenna pigments.