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Title: One-electron redox potentials of phenols in aqueous solution

Abstract

The oxidation peak potentials (E{sub p}) of 31 phenolate, chlorophenolate, and other para-substituted phenolate ions were measured as a function of scan rate, substrate concentration, and pH by cyclic voltammetry in aqueous solution. The one-electron reduction potentials (E{sub red}{degree}) of the phenoxyl radical/phenolate ion couples were evaluated from E{sub p} and the rate constants for dimerization of the phenoxyl radicals. The dependence of E{sub red}{degree} on pH was established, and the relationships that connect E{sub red}{degree} with the brown {sigma}{sup +} constant, the pK{sub a} values of the phenols and the protonated phenoxyl radical cations, and the reduction potentials of the protonated radicals were explored.

Authors:
;  [1]
  1. Boston Univ., MA (United States). Dept. of Chemistry
Publication Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
691309
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
Additional Journal Information:
Journal Volume: 103; Journal Issue: 32; Other Information: PBD: 12 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; REDOX POTENTIAL; PHENOLS; WATER; SOLUTIONS; REDUCING AGENTS; VOLTAMETRY

Citation Formats

Li, C., and Hoffman, M.Z. One-electron redox potentials of phenols in aqueous solution. United States: N. p., 1999. Web. doi:10.1021/jp983819w.
Li, C., & Hoffman, M.Z. One-electron redox potentials of phenols in aqueous solution. United States. doi:10.1021/jp983819w.
Li, C., and Hoffman, M.Z. Thu . "One-electron redox potentials of phenols in aqueous solution". United States. doi:10.1021/jp983819w.
@article{osti_691309,
title = {One-electron redox potentials of phenols in aqueous solution},
author = {Li, C. and Hoffman, M.Z.},
abstractNote = {The oxidation peak potentials (E{sub p}) of 31 phenolate, chlorophenolate, and other para-substituted phenolate ions were measured as a function of scan rate, substrate concentration, and pH by cyclic voltammetry in aqueous solution. The one-electron reduction potentials (E{sub red}{degree}) of the phenoxyl radical/phenolate ion couples were evaluated from E{sub p} and the rate constants for dimerization of the phenoxyl radicals. The dependence of E{sub red}{degree} on pH was established, and the relationships that connect E{sub red}{degree} with the brown {sigma}{sup +} constant, the pK{sub a} values of the phenols and the protonated phenoxyl radical cations, and the reduction potentials of the protonated radicals were explored.},
doi = {10.1021/jp983819w},
journal = {Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical},
number = 32,
volume = 103,
place = {United States},
year = {1999},
month = {8}
}