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Title: One-electron oxidation of photosynthetic pigments in micelles. Bacteriochlorophyll a, chlorophyll a, chlorophyll b, and pheophytin a

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j150623a020· OSTI ID:6071137
 [1]; ; ;
  1. Ecole Normale Superieure de Saint-Cloud, France
+ Show Author Affiliations

Chlorophyll a, chlorophyll b, and bacteriochlorophyll a in aqueous micellar solutions of Trition X 100 (2%) are readily oxidized by pulse-radiolytically generated N/sub 3/., Br/sub 2//sup -/., and (SCN)/sub 2//sup -/. radicals at nearly diffusion-controlled rates. The kinetic study suggests that pigment molecules occupy multiple sites in the micelle. Pheophytin a is only oxidized by N/sub 3/. and Br/sub 2//sup -/. radicals. The absolute spectra and the molar extinction coefficients of chlorophyll a, bacteriochlorophyll a, chlorophyll b, and pheophytin a cations have been determined. The chlorophyll a cation has been observed in the presence of pigment aggregates.

OSTI ID:
6071137
Journal Information:
J. Phys. Chem.; (United States), Vol. 85:23
Country of Publication:
United States
Language:
English

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Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
AZIDES
RADIOLYSIS
CHLOROPHYLL
CHEMICAL REACTION KINETICS
OXIDATION
PIGMENTS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
RADICALS
SODIUM BROMIDES
SODIUM CHLORIDES
THIOCYANATES
CATIONS
EXPERIMENTAL DATA
MICELLAR SYSTEMS
PULSED IRRADIATION
SURFACTANTS
ALKALI METAL COMPOUNDS
ANTITHYROID DRUGS
BROMIDES
BROMINE COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CARBONIC ACID DERIVATIVES
CARBOXYLIC ACIDS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
DATA
DECOMPOSITION
DRUGS
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HORMONE ANTAGONISTS
INFORMATION
IONS
IRRADIATION
KINETICS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PHYTOCHROMES
PORPHYRINS
RADIATION CHEMISTRY
RADIATION EFFECTS
REACTION KINETICS
SODIUM COMPOUNDS
400600* - Radiation Chemistry