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 04:00:00 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), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 98:20; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

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