Quantum yield of formation of methylviologen radical cation in the photolysis of the Ru(bpy)/sub 3//sup 2 +//methylviologen/EDTA system
The quantum yield of formation of the methylviologen radical cation, PHI (MV/sup +/), upon the 450-nm continuous photolysis of the Ru(bpy)/sub 3//sup 2 +//methylviologen dication/EDTA system in deaerated aqueous solution bpy-bipyridine has been determined as a function of (MV/sup 2 +/) (0.5-20 mM), (EDTA) (0.05-100 mM), pH (3.7-11.0), and temperature (6-50/sup 0/C) at constant (Ru(bpy)/sub 3//sup 2 +/) (1.0 x 10/sup -4/ M). The results are discussed in terms of the mechanism of the reaction and the effect of solution medium on the rate constant of quenching of *Ru(bpy)/sub 3//sup 2 +/ by MV/sup 2 +/, the cage release yield of redox products, the scavenging of Ru(bpy)/sub 3//sup 3 +/ by EDTA, and the secondary reduction of MV/sup 2 +/ by EDTA-derived radicals. 46 references, 9 figures, 3 tables.
- Research Organization:
- Boston Univ., MA
- OSTI ID:
- 5902179
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:8; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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AMINO ACIDS
AQUEOUS SOLUTIONS
AZINES
BIPYRIDINES
CARBOXYLIC ACIDS
CATALYSTS
CHELATING AGENTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPLEXES
DATA
DECOMPOSITION
DISPERSIONS
EDTA
EFFICIENCY
ELECTRON TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
HYDROGEN PRODUCTION
INFORMATION
IONIZATION
KINETICS
LEAST SQUARE FIT
MATHEMATICAL MODELS
MATHEMATICS
MAXIMUM-LIKELIHOOD FIT
MIXTURES
NUMERICAL ANALYSIS
NUMERICAL DATA
NUMERICAL SOLUTION
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PH VALUE
PHOTOCHEMICAL REACTIONS
PHOTOIONIZATION
PHOTOLYSIS
PYRIDINES
QUANTITY RATIO
REACTION INTERMEDIATES
REACTION KINETICS
REDOX REACTIONS
RUTHENIUM COMPLEXES
SOLUTIONS
TIME DEPENDENCE
TRANSITION ELEMENT COMPLEXES