PHOTOINDUCED ONE‐ELECTRON TRANSFER BETWEEN BACTERIOCHLOROPHYLL AND QUINONE IN ACETONE*
- 1 February 1974
- journal article
- Published by Wiley in Photochemistry and Photobiology
- Vol. 19 (2) , 163-167
- https://doi.org/10.1111/j.1751-1097.1974.tb06492.x
Abstract
Abstract— Illumination with red light of a degassed solution of bacteriochlorophyll and benzoquinone or ubiquinone in dry acetone at low temperatures (< ‐ 105°C) leads to the formation of the bacteriochlorophyll cation radical and the quinone anion radical, as detected by ESR spectroscopy. At temperatures around ‐ 110°C, the quinone radical signal corresponds to an emission of microwave radiation. These results are interpreted in terms of a one‐electron transfer from a spin‐polarized bacteriochlorophyll triplet state to the quinone, producing an anion radical which is predominantly in the upper spin state.Keywords
This publication has 16 references indexed in Scilit:
- In Vitro Photoreactions of Chlorophyll and Photosynthetic Energy Conversion: Chlorophyll-Quinone-Ethanol at Low Temperature as an Analog of Photosystems I and IIProceedings of the National Academy of Sciences, 1972
- Identification of an electron acceptor in reaction centers of Rhodopseudomonas spheroides by EPR spectroscopyBiochimica et Biophysica Acta (BBA) - Bioenergetics, 1972
- The Question of the Primary Electron Acceptor in Bacterial PhotosynthesisProceedings of the National Academy of Sciences, 1972
- The primary electron acceptor in photosynthesisBiochemical and Biophysical Research Communications, 1972
- Primary processes in photosynthesis: Insitu ESR studies on the light induced oxidized and triplet state of reaction center bacteriochlorophyllBiochemical and Biophysical Research Communications, 1972
- Primary Reactions of Photosynthesis: Photoreduction of a Bound Chloroplast Ferredoxin at Low Temperature as Detected by EPR SpectroscopyProceedings of the National Academy of Sciences, 1971
- Quantum yield for the photoproduced electron paramagnetic resonance signal in chromatophores from Rhodospirillum rubrumBiochemistry, 1969
- On the nature of the free radical formed during the primary process of bacterial photosynthesisBiochimica et Biophysica Acta (BBA) - Bioenergetics, 1969
- Light-induced single electron transfer reactions between chlorophyll a and quinones in solutionBiochimica et Biophysica Acta, 1962
- Paramagnetic Resonance Spectra of Some Semiquinone Free RadicalsThe Journal of Chemical Physics, 1958