Excited-state photochemistry in the tris(2,2'-bipyridine)ruthenium(II)--sulfite system

Journal Article · Wed Feb 28 04:00:00 EST 1979 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00499a050· OSTI ID:6378076

Creutz, C; Sutin, N; Brunschwig, B S

When solutions containing Ru(bpy)/sub 3//sup 2 +/ (5 x 10/sup -5/ M) and a reductant such as aqueous europium/sup 2 +/ or sodium ascorbate are subjected to laser flash photolysis the product Ru(bpy)/sub 3//sup +/ (monitored at 500 nm) forms in the second stage of the reaction after the laser pulse. By contrast, when solutions containing Ru(bpy)/sub 3//sup 2 +/ and sodium sulfite (.1-1.0M) are flash photolyzed at moderate to high light intensities (10-10/sup 2/ einstein cm/sup -2/ s/sup -/, Ru(bpy)/sub 3//sup +/ is formed in both of the first two stages of the reaction, both during and after the laser pulse. The relative amount formed during the laser pulse rises steeply with laser intensity. Formation of Ru(bpy)/sub 3//sup +/ in the second slow stage is observed at all intensities and its rate of formation is essentially the same as that for Ru(bpy)/sub 3//sup 2 +/ disappearance. Rate constants have been calculated. 1 figure.

• Research Organization: Brookhaven National Lab., Upton, NY
• OSTI ID: 6378076
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 101:5; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400500 -- Photochemistry
ABSORPTION SPECTRA
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
ASCORBIC ACID
AZINES
BIPYRIDINES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPLEXES
DATA
DATA FORMS
DECOMPOSITION
DISPERSIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
EUROPIUM COMPOUNDS
EXCITED STATES
EXPERIMENTAL DATA
GRAPHS
HETEROCYCLIC COMPOUNDS
INFORMATION
KINETICS
LASER RADIATION
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PH VALUE
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PYRIDINES
QUANTITY RATIO
RADIATIONS
RARE EARTH COMPOUNDS
REACTION INTERMEDIATES
REACTION KINETICS
REDUCTION
RUTHENIUM COMPLEXES
SODIUM COMPOUNDS
SODIUM SULFIDES
SOLUTIONS
SPECTRA
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPLEXES
VITAMINS
WAVELENGTHS