Electron-transfer reactions of excited states: direct evidence for reduction of the charge-transfer excited state of tris(2,2'-bipyridine)ruthenium(II)

Journal Article · Wed Sep 29 00:00:00 EDT 1976 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00436a054· OSTI ID:7142505

Creutz, C; Sutin, N

Results of flash-photolysis experiments of the quenching of the charge-transfer excited state of tris(2,2'-bipyridine)ruthenium(II) (*Ru(bpy)/sub 3//sup 2 +/) are presented that provide direct evidence for its reduction. The system Eu/sup II/--Ru(bpy)/sub 3//sup 2 +/ was studied in the flash-photolysis experiments. The results not only provide ample evidence that the charge-transfer excited state of the Ru(bpy)/sub 3//sup 2 +/ readily undergoes both oxidation and reduction as had been predicted but also allows the estimation that disproportionation of the excited state according to the equation, 2*Ru(bpy)/sub 3/ /sup 2 +/ reversible Ru(bpy)/sub 3//sup 3 +/ + Ru(bpy)/sub 3//sup +/ is favored by approximately 1.7V. (BLM)

• Research Organization: Brookhaven National Lab., Upton, NY
• OSTI ID: 7142505
• Journal Information: J. Am. Chem. Soc.; (United States), Vol. 98:20
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
RUTHENIUM COMPLEXES
OXIDATION
PHOTOLYSIS
REDUCTION
BIPYRIDINES
EXCITED STATES
AZINES
CHEMICAL REACTIONS
COMPLEXES
DECOMPOSITION
ENERGY LEVELS
HETEROCYCLIC COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PYRIDINES
TRANSITION ELEMENT COMPLEXES
400500* - Photochemistry