ESR study of some gamma irradiated amino acids and condensed 1,4-dihydropyridines


Aydin M., ŞİMŞEK R. , GÜNDÜZ M. G. , Safak C. , Osmanoglu Y. E.

JOURNAL OF MOLECULAR STRUCTURE, vol.1035, pp.378-382, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1035
  • Publication Date: 2013
  • Doi Number: 10.1016/j.molstruc.2012.11.037
  • Title of Journal : JOURNAL OF MOLECULAR STRUCTURE
  • Page Numbers: pp.378-382

Abstract

L-alanine methyl ester hydrochloride, 2-aminoisobutyric acid and some condensed 1,4-dihydropyridine derivatives (Compounds R1-R4) were gamma irradiated, the induced free radicals was investigated at room temperature by electron spin resonance techniques. The observed paramagnetic species of amino acids compounds were attributed to the CH3<(C)over dot>HCOOCH3 and (CH3)(2)<(C)over dot>COOH radicals, respectively. The observed spectra of the 1,4-dihydropyridine derivatives interpreted in terms of some type of amine radical fragments. The spectra were computer simulated and the g values of the radicals and the hyperfine structure constants of the unpaired electron with nearby protons and N-14 nucleus were determined. In this study, the observed paramagnetic species were found to be stable at room temperature more than 2 months. Published by Elsevier B.V.