Quenching of Electrogenerated Chemiluminescence by Phenols, Hydroquinones, Catechols, and Benzoquinones
Abstract
Efficient quenching of Ru(bpy)32+ (bpy = 2,2‘-bipyridine) electrogenerated chemiluminescence has been observed in the presence of phenols, catechols, hydroquinones, and benzoquinones. In most instances, quenching is observed with 100-fold excess of quencher over Ru(bpy)32+, with complete quenching observed between 1000- and 2000-fold excess. The mechanism of quenching is believed to involve energy transfer from the excited-state luminophore to benzoquinone. In the case of phenols, catechols, and hydroquinones, quenching is believed to occur via a benzoquinone derivative formed at the electrode surface. Photoluminescence and UV−visible experiments coupled with bulk electrolysis support the formation of benzoquinone products upon electrochemical oxidation.
Department(s)
Chemistry and Biochemistry
Document Type
Article
DOI
https://doi.org/10.1021/ac981322c
Keywords
hydrocarbons, photoluminescence, aromatic compounds, electrolysis, quenching
Publication Date
5-15-1999
Recommended Citation
McCall, J., C. Alexander, and M. M. Richter. "Quenching of electrogenerated chemiluminescence by phenols, hydroquinones, catechols, and benzoquinones." Analytical chemistry 71, no. 13 (1999): 2523-2527.
Journal Title
Analytical chemistry
