Aydin, MuratSimsek, RahimeGunduz, Miyase GozdeSafak, CihatOsmanoglu, Y. Emre2024-04-242024-04-2420130022-28601872-8014https://doi.org/10.1016/j.molstruc.2012.11.037https://hdl.handle.net/11468/15856L-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.eninfo:eu-repo/semantics/closedAccessEsrFree RadicalsAmino Acids1,4-DihydropyridinesArticle1035378382WOS:0003153155000512-s2.0-8487360452510.1016/j.molstruc.2012.11.037Q1Q3