Characterization and catalytic activity of covalently linked bipyridyl ruthenium OXO dimers
- Colorado State Univ., Fort Collins, CO (United States). Dept. of Chemistry
This paper reports that covalently linked bipyridyl ligands (L-L) with alkyl linkages varying from (-CH[sub 2]-)[sub 2] to (-CH[sub 2]-)[sub 12] were used to prepare ruthenium oxo dimers of the form [bpy (H[sub 2]O)RuO(L-L)Ru(H[sub 2]O) (bpy)][sup 4+]. The bridging alkyl linkage increased the stability of these oxo dimers by maintaining the relative proximity of the two ruthenium centers even when the oxo bridge is cleaved. These complexes have been characterized by electronic spectroscopy and electrochemistry. The electrochemistry in CH[sub 3]CN/0.1M TBAP exhibits a reversible one-electron oxidation followed by a second reversible two-electron oxidation which becomes catalytic in aqueous solution. The catalytic generation of dioxygen from water was observed upon bulk electrolysis of the oxo dimer at + 1.39 V.
- OSTI ID:
- 6956527
- Journal Information:
- Journal of the Electrochemical Society; (United States), Vol. 139:8; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PYRIDYL RADICALS
CATALYSIS
RUTHENIUM COMPLEXES
ALKYL RADICALS
CLEAVAGE
COVALENCE
DIMERS
ELECTROCHEMISTRY
ELECTRON SPECTROSCOPY
LIGANDS
OXIDATION
RUTHENIUM OXIDES
STABILITY
TWO-BODY PROBLEM
WATER
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
CRYSTAL STRUCTURE
HYDROGEN COMPOUNDS
MANY-BODY PROBLEM
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
RADICALS
REFRACTORY METAL COMPOUNDS
RUTHENIUM COMPOUNDS
SPECTROSCOPY
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
400400* - Electrochemistry