Electron paramagnetic resonance studies of gamma-irradiated DL-alanine ethyl ester hydrochloride, L-theanine and L-glutamic acid dimethyl ester hydrochloride

M Halim Başkan; Murat Aydın

doi:10.1016/j.saa.2013.04.039

Electron paramagnetic resonance studies of gamma-irradiated DL-alanine ethyl ester hydrochloride, L-theanine and L-glutamic acid dimethyl ester hydrochloride

Spectrochim Acta A Mol Biomol Spectrosc. 2013 Aug:112:280-2. doi: 10.1016/j.saa.2013.04.039. Epub 2013 Apr 25.

Authors

M Halim Başkan¹, Murat Aydın

Affiliation

¹ Faculty of Education, Dicle University, Diyarbakır, Turkey. hbaskan@dicle.edu.tr

PMID: 23680512
DOI: 10.1016/j.saa.2013.04.039

Abstract

The electron paramagnetic resonance (EPR) of gamma irradiated powders of DL-alanine ethyl ester hydrochloride, L-theanine and L-glutamic acid dimethyl ester hydrochloride were investigated at room temperature. The observed paramagnetic species were attributed to the CH3ĊHCOOC2H5, -CH2ĊHCOOH and -CH2ĊHCOOCH3 radicals, respectively. Hyperfine structure constants and g-values were determined for these three radicals. Some spectroscopic properties and suggestions concerning the possible structure of the radicals were also discussed.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Alanine / analogs & derivatives*
Electron Spin Resonance Spectroscopy
Free Radicals / chemistry*
Gamma Rays
Glutamates / chemistry*

Substances

Free Radicals
Glutamates
glutamic acid dimethyl ester
theanine
Alanine