EPR and FT-IR spectroscopic studies of l-lysine monohydrochloride and l-glutamic acid hydrochloride powders

Add time:09/09/2019    Source:sciencedirect.com

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 H2NCH2CH2CH2CH2ĊHCOOH and HOOCCH2CH2ĊHCOOH radicals, respectively. In both radicals, the unpaired electron interacted with α-proton and β-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.

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