The Vitamin E Radical Probed by Anion Photoelectron Imaging

Anstöter, C.S.; West, C.W.; Bull, J.N.; Verlet, J.R.R.

Abstract

The biological antioxidant activity of vitamin E has been related to the stability of the tocopheroxyl radical. Using anion photoelectron imaging and electronic structure calculations, the four tocopheroxyl components of vitamin E have been studied in the gas phase and have yielded the adiabatic electron affinity of the α-, β/γ-, and δ-tocopheroxyl radicals. Using these values, the bond dissociation enthalpy of the O–H bond of tocopherol has been estimated and is consistent with previous studies and with the trends in biological activity. Differences in the photoelectron angular distributions have been interpreted to result from changes in the symmetry of the molecular orbitals from which the electron was detached.

Citation

Anstöter, C., West, C., Bull, J., & Verlet, J. (2016). The Vitamin E Radical Probed by Anion Photoelectron Imaging. Journal of Physical Chemistry B (Soft Condensed Matter and Biophysical Chemistry), 120(29), 7108-7113. https://doi.org/10.1021/acs.jpcb.6b05271

• Journal Article Type: Article
• Online Publication Date: Jul 1, 2016
• Publication Date: Jul 28, 2016
• Deposit Date: Oct 31, 2016
• Publicly Available Date: Jul 1, 2017
• Journal: Journal of Physical Chemistry B (Soft Condensed Matter and Biophysical Chemistry)
• Print ISSN: 1520-6106
• Electronic ISSN: 1520-5207
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 120
• Issue: 29
• Pages: 7108-7113
• DOI: https://doi.org/10.1021/acs.jpcb.6b05271
• Public URL: https://durham-repository.worktribe.com/output/1371810