2024-03-29T00:43:05Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00011885
2022-12-14T04:38:23Z
1169:1170
Characterization of electrochemiluminescence of tris(2,2′-bipyridine)ruthenium(II) with glyphosate as coreactant in aqueous solution
Jin, Jiye
Takahashi, Fumiki
Kaneko, Tsutomu
Nakamura, Toshio
Copyright (c) 2010 Elsevier Ltd.
Electrogenerated chemiluminescence of Ru(bpy)(3)(2+)
Glyphosate
EC' catalytic reaction
Ultramicroelectrode
Potential modulated ECL
Glyphosate, a phosphorus-containing amino acid type herbicide was used as a coreactant for studying of electrochemiluminescence (ECL) reaction of tris(2,2'-bipyridyl)ruthenium(II) [Ru(bpy)(3)(2+)] in an aqueous solution. In a phosphate buffer solution of pH 8, glyphosate itself was known to be electrochemically inactive at glassy carbon electrode, however, it participated in a homogeneous chemical reaction with the electrogenerated Ru(bpy)(3)(3+), and resulted in producing Ru(bpy)(3)(2+) species at the electrode surface. Kinetic and mechanistic information for the catalysis of glyphosate oxidation were evaluated by the steady-state voltammetric measurement with an ultramicroelectrode. The simulated cyclic voltammogram based on this mechanism was in good agreement with that obtained experimentally. ECL reaction of Ru(bpy)(3)(2+)/glyphosate system was found to be strongly dependent on the media pH. In a pH region of 5-9, an ECL wave appeared at ca. +1.1 V vs. Ag/AgCl, which was caused by the generation of *Ru(bpy)(3)(2+) via a Ru(bpy)(3)(3+)-mediated oxidation of glyphosate. When pH >10, a second ECL wave was observed at ca. +1.35 V vs. Ag/AgCl, which was believed to be associated with a reaction between Ru(bpy)(3)(3+) and the species from direct oxidation of GLYP at a GC electrode surface.
Article
Electrochimica Acta 55(20):5532-5537 (2010)
PERGAMON-ELSEVIER SCIENCE LTD
2010-08-01
eng
journal article
AM
http://hdl.handle.net/10091/10725
https://soar-ir.repo.nii.ac.jp/records/11885
https://doi.org/10.1016/j.electacta.2010.04.031
10.1016/j.electacta.2010.04.031
00134686
AA00633261
Electrochimica Acta
55
20
5532
5537
https://soar-ir.repo.nii.ac.jp/record/11885/files/Characterization_electrochemiluminescence.pdf
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