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Bacteriocholorophyll a cation radical in solution and in reaction centers of Rhodopseudomonas sphaeroides. Resonance Raman scattering. 1979

M Lutz, and J Kleo

Resonance Raman spectra of the pi-cation of bacterio-chlorophyll a in solution at 30 K are reported and discussed. Outer (formula: see text) bonds of the pyrroles and the methine bridges are weakened by the ionization, while (formula: see text) and Mg-N bonds remain essentially unaffected. Resonance Raman spectra of reaction centers suggest that the positive charge on P-870+ should be localized on a single bacteriochlorophyll molecule by the lifetime of the scattering process (approximately 10(-13)s).

UI MeSH Term Description Entries
D002412 Cations Positively charged atoms, radicals or groups of atoms which travel to the cathode or negative pole during electrolysis. Cation
D002734 Chlorophyll Porphyrin derivatives containing magnesium that act to convert light energy in photosynthetic organisms. Phyllobilins,Chlorophyll 740
D001429 Bacteriochlorophylls Pyrrole containing pigments found in photosynthetic bacteria. Bacteriochlorophyll
D012242 Rhodobacter sphaeroides Spherical phototrophic bacteria found in mud and stagnant water exposed to light. Rhodopseudomonas sphaeroides,Rhodobacter spheroides,Rhodopseudomonas spheroides
D013059 Spectrum Analysis, Raman Analysis of the intensity of Raman scattering of monochromatic light as a function of frequency of the scattered light. Raman Spectroscopy,Analysis, Raman Spectrum,Raman Optical Activity Spectroscopy,Raman Scattering,Raman Spectrum Analysis,Scattering, Raman,Spectroscopy, Raman

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