Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Electrogenerated chemiluminescence. 41. Electrogenerated chemiluminescence and chemiluminescence of the Ru(2,2'-bpy)/sub 3//sup 2 +/-S/sub 2/O/sub 8//sup 2 -/ system in acetonitrile-water solutions

Journal Article · · J. Am. Chem. Soc.; (United States)
DOI:https://doi.org/10.1021/ja00389a001· OSTI ID:6450242
The electrogenerated chemiluminescence (ecl) produced in acetonitrile-water solutions (1:1 by volume) by the reaction of electrogenerated Ru(bpy)/sub 3//sup +/ with the strongly oxidizing intermediate, SO/sub 4//sup -/., generated during reduction of S/sub 2/O/sub 8//sup 2 -/ is described. The orange luminescence (lambda/sub max/ = 625 nm) corresponds to emission from Ru(bpy)/sub 3//sup 2 +/*. The relative ecl intensity is a function of S/sub 2/O/sub 8//sup 2 -/ concentration, and for a 1 mM Ru(bpy)/sub 3//sup 2 +/ solution the maximum ecl intensity was obtained at 15-20 mM S/sub 2/O/sub 8//sup 2 -/. Slightly higher concentrations (>30 mM S/sub 2/O/sub 8//sup 2 -/) effectively quench light emission because of the Ru(bpy)/sub 3//sup 2 +/*-S/sub 2/O/sub 8//sup 2 -/ reaction. The ecl efficiency (photons produced/electrons consumed) was approx. 5% and was insensitive to dissolved O/sub 2/. A chemiluminescence based on reduction with Mg metal is also described.
Research Organization:
Univ. of Texas, Austin
OSTI ID:
6450242
Journal Information:
J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 104:25; ISSN JACSA
Country of Publication:
United States
Language:
English