Ruthenium(II) tris(bipyrazyl) dication: a new photocatalyst

Journal Article · Wed Nov 05 04:00:00 EST 1980 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00543a053· OSTI ID:6947282

Crutchley, R J; Lever, A B.P.

Many photoredox schemes to produce hydrogen gas have been developed by utilizing ruthenium tris(bipyridyl) dication, Ru(bpy)/sub 3//sup 2 +/, as a photosensitizer. Irradiation of an acetonitrile-water solution of Ru(bpy)/sub 3//sup 2 +/, triethylamine, and PtO/sub 2/ resulted in PHI/sub H/sub 2// = 0.37. The chemically active excited d..pi.. ..-->.. ..pi..* state of Ru(bpy)/sub 3//sup 2 +/ is relatively long lived (0.685 ..mu..s) and is capable of acting as either an oxidizing or a reducing agent. Low yields of oxygen and hydrogen at a pH of 4.7 have been observed when aqueous solutions of Ru(bpy)/sub 3//sup 2 +/, methyl viologen (MV/sup 2 +/), colloidal RuO/sub 2/ and colloidal Pt are illuminated. Charge-transfer emissions are characteristic of ruthenium complexes bonded to the ..cap alpha..-dimine (-N==C-C==N-) functionality which can be incorporated in either an aromatic or nonaromatic ligand. 1 figure. (DP)

• Research Organization: York Univ., Downsview, Ontario
• OSTI ID: 6947282
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 102:23; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080106* -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
CHEMICAL REACTIONS
COMPLEXES
DISSOCIATION
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
KINETICS
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
REACTION KINETICS
RUTHENIUM COMPLEXES
RUTHENIUM COMPOUNDS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
WATER