Related Experiment Video
Updated: Oct 10, 2025

Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
Published on: August 18, 2012
Electron and proton magnetic resonance spectroscopic investigation of anthracene oxidation
Mohamed A Morsy1, Abdel-Nasser M Kawde2, Muhammad Kamran1
1Chemistry Department, College of Chemicals and Materials, King Fahd University of Petroleum & Minerals, P.O. Box 1624, Dhahran 31261, Saudi Arabia.
Abstract:
The work reports a method for monitoring anthracene radical-mediated oxidation reactions using electron paramagnetic resonance (EPR) spectroscopy. The formation of anthracene dimer product was well-defined using 1H-NMR and 1H-1H correlation spectroscopy (COSY). Unrestricted 3-21G/B3LYP DFT was used to estimate radical hyperfine spacing (hfs), then to identify the characteristic EPR-spin transitions of anthracene radical intermediate. A detailed investigation of an anthracene oxidation reaction and its possible reaction mechanism in concentrated sulphuric acid is conducted as a model system for polyaromatic hydrocarbons. Peak-to-peak (p2p) intensities of selected EPR-spectral lines were used to evaluate anthracene's oxidation kinetic model. The findings showed that radical intermediate formation is a unimolecular autocatalytic process, dimerization is a pseudo-zero-order reaction, and the latter is the rate-determining step with a half-life of 48 ± 2 min at 25.0 °C.
More Related Videos
Related Concept Videos
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
NMR Spectroscopy and Mass Spectrometry of Aldehydes and Ketones
π Electron Effects on Chemical Shift: Overview
Proton (¹H) NMR: Chemical Shift
Absorption signals of all the protium nuclei...
NMR Spectroscopy of Aromatic Compounds

