Electrogenerated chemiluminescence. 70. The application of ECL to determine electrode potentials of tri-n-propylamine, its radical cation, and intermediate free radical in MeCN/benzene solutions

Rebecca Y. Lai, Allen J. Bard

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105 Citations (Scopus)

Abstract

We report here electrogenerated chemiluminescence (ECL) observed upon oxidation of aromatic hydrocarbons with different potentials for oxidation to the radical cations (D+.) and tri-n-propylamine (TPrA) in MeCN/ benzene solutions. In this system, with TPrA as a coreactant, ECL is generated by reaction of D+. with the free radical intermediate produced upon oxidation of TPrA. ECL was observed from three out of the eight compounds studied. On the basis of the energetic criterion for ECL, the potential for oxidation of the intermediate free radical, Pr2N(CH.)Et, was found to be about -1.7 V vs SCE. By studying the fluorescence quenching of several polycyclic aromatic hydrocarbons (PAHs) by TPrA, the standard potential for oxidation of TPrA to TPrA+. was estimated as 0.9 V vs SCE.

Original languageEnglish (US)
Pages (from-to)3335-3340
Number of pages6
JournalJournal of Physical Chemistry A
Volume107
Issue number18
DOIs
StatePublished - May 8 2003

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Chemiluminescence
chemiluminescence
Benzene
free radicals
Free Radicals
Cations
benzene
cations
oxidation
Electrodes
electrodes
Oxidation
Aromatic Hydrocarbons
polycyclic aromatic hydrocarbons
Polycyclic Aromatic Hydrocarbons
hydrocarbons
quenching
tripropylamine
Quenching
methylidyne

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

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title = "Electrogenerated chemiluminescence. 70. The application of ECL to determine electrode potentials of tri-n-propylamine, its radical cation, and intermediate free radical in MeCN/benzene solutions",
abstract = "We report here electrogenerated chemiluminescence (ECL) observed upon oxidation of aromatic hydrocarbons with different potentials for oxidation to the radical cations (D+.) and tri-n-propylamine (TPrA) in MeCN/ benzene solutions. In this system, with TPrA as a coreactant, ECL is generated by reaction of D+. with the free radical intermediate produced upon oxidation of TPrA. ECL was observed from three out of the eight compounds studied. On the basis of the energetic criterion for ECL, the potential for oxidation of the intermediate free radical, Pr2N(CH.)Et, was found to be about -1.7 V vs SCE. By studying the fluorescence quenching of several polycyclic aromatic hydrocarbons (PAHs) by TPrA, the standard potential for oxidation of TPrA to TPrA+. was estimated as 0.9 V vs SCE.",
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T1 - Electrogenerated chemiluminescence. 70. The application of ECL to determine electrode potentials of tri-n-propylamine, its radical cation, and intermediate free radical in MeCN/benzene solutions

AU - Lai, Rebecca Y.

AU - Bard, Allen J.

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N2 - We report here electrogenerated chemiluminescence (ECL) observed upon oxidation of aromatic hydrocarbons with different potentials for oxidation to the radical cations (D+.) and tri-n-propylamine (TPrA) in MeCN/ benzene solutions. In this system, with TPrA as a coreactant, ECL is generated by reaction of D+. with the free radical intermediate produced upon oxidation of TPrA. ECL was observed from three out of the eight compounds studied. On the basis of the energetic criterion for ECL, the potential for oxidation of the intermediate free radical, Pr2N(CH.)Et, was found to be about -1.7 V vs SCE. By studying the fluorescence quenching of several polycyclic aromatic hydrocarbons (PAHs) by TPrA, the standard potential for oxidation of TPrA to TPrA+. was estimated as 0.9 V vs SCE.

AB - We report here electrogenerated chemiluminescence (ECL) observed upon oxidation of aromatic hydrocarbons with different potentials for oxidation to the radical cations (D+.) and tri-n-propylamine (TPrA) in MeCN/ benzene solutions. In this system, with TPrA as a coreactant, ECL is generated by reaction of D+. with the free radical intermediate produced upon oxidation of TPrA. ECL was observed from three out of the eight compounds studied. On the basis of the energetic criterion for ECL, the potential for oxidation of the intermediate free radical, Pr2N(CH.)Et, was found to be about -1.7 V vs SCE. By studying the fluorescence quenching of several polycyclic aromatic hydrocarbons (PAHs) by TPrA, the standard potential for oxidation of TPrA to TPrA+. was estimated as 0.9 V vs SCE.

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