Nitrogen electron nuclear double resonance and proton triple resonance experiments on the bacteriochlorophyll cation in solution.
- 1 May 1978
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 75 (5) , 2296-2300
- https://doi.org/10.1073/pnas.75.5.2296
Abstract
Electron nuclear double resonance signals of the pyrrole N of bacteriochlorophyll a cation [from Rhodospirillum rubrum] in a solution of CH2Cl2/CH3OH (6:1) were observed. The N are inequivalent: the hyperfine coupling constants were 2.36 and 3.18 MHz (0.84 and 1.14 G, respectively). Triple electron nuclear double resonance experiments have yielded the signs and values of 9 proton hyperfine coupling constants. The assignment based on these data agrees well with previous work; 2 methine protons were also identified. Spin densities calculated from the hyperfine couplings are compared to reported molecular orbital calculations.This publication has 17 references indexed in Scilit:
- Theory of proton hyperfine interactions in bacterial photosynthetic systems.Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1978
- ESR and ENDOR studies of the .pi. cation radical of bacteriochlorophyllJournal of the American Chemical Society, 1976
- The primary photoreactions in the complex cytochrome-P-890 · P-760 (bacteriopheophytin760) of Chromatium minutissimum at low redox potentialsBiochimica et Biophysica Acta (BBA) - Bioenergetics, 1976
- ENDOR EXPERIMENTS ON CHLOROPHYLL AND BACTERIOCHLOROPHYLL IN VITRO AND IN THE PHOTOSYNTHETIC UNIT*Annals of the New York Academy of Sciences, 1975
- ESR STUDIES OF PORPHYRIN π‐CATIONS: THE 2A1u and 2A2u STATES*Annals of the New York Academy of Sciences, 1973
- Electron nuclear double resonance of bacteriochlorophyll free radical in vitro and in vivoJournal of the American Chemical Society, 1973
- Electron spin resonance of [magnesium-25]chlorophyll aJournal of the American Chemical Society, 1973
- Characterization of primary reactants in bacterial photosynthesis. I. Comparison of the light-induced EPR signal (g = 2.0026) with that of a bacteriochlorophyll radicalBiochimica et Biophysica Acta (BBA) - Bioenergetics, 1972
- Identification of an electron acceptor in reaction centers of Rhodopseudomonas spheroides by EPR spectroscopyBiochimica et Biophysica Acta (BBA) - Bioenergetics, 1972
- ABSORPTION CHANGES IN THE REACTION CENTER OF PHOTOSYNTHETIC BACTERIA AND n‐ELECTRON CALCULATIONS ON BACTERIOCHLOROPHYLL, ITS MONO CATION AND ANIONPhotochemistry and Photobiology, 1971