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    Öğe
    Electron paramagnetic resonance and FT-IR spectroscopic studies of glycine anhydride and betaine hydrochloride
    (Taylor & Francis Ltd, 2015) Baskan, M. Halim; Kartal, Zeki; Aydin, Murat
    Gamma irradiated powders of glycine anhydride and betaine hydrochloride have been investigated at room temperature by electron paramagnetic resonance (EPR). In these compounds, the observed paramagnetic species were attributed to the R1 and R2 radicals, respectively. It was determined that the free electron interacted with environmental protons and N-14 nucleus in both radicals. The EPR spectra of gamma irradiated powder samples remained unchanged at room temperature for two weeks after irradiation. Also, the Fourier Transform Infrared (FT-IR), FT-Raman and thermal analyses of both compounds were investigated. The functional groups in the molecular structures of glycine anhydride and betaine hydrochloride were identified by vibrational spectroscopies (FT-IR and FT-Raman).
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    Öğe
    EPR and FT-IR spectroscopic studies of L-lysine monohydrochloride and L-glutamic acid hydrochloride powders
    (Elsevier, 2011) Aydin, Murat; Kartal, Zeki; Osmanoglu, Semsettin; Baskan, M. Halim; Topkaya, Ramazan
    Powders of L-lysine monohydrochloride and L-glutamic acid hydrochloride were gamma irradiated and the induced free radicals were investigated at room temperature by electron magnetic resonance techniques. The observed species in these compounds were attributed to the H(2)NCH(2)CH(2)CH(2)CH(2)CHGOOH and HOOCCH2CH2CHCOOH radicals, respectively. In both radicals, the unpaired electron interacted with alpha-proton and beta-protons. Also, the FT-IR and thermal analyses of both compounds were investigated. The functional groups in the molecular structures of L-lysine monohydrochloride and L-glutamic acid hydrochloride were identified by FT-IR spectrometer. The TGA, DTA and DTG graphics were obtained to explain the thermal behavior of molecules. (C) 2011 Elsevier B.V. All rights reserved.