Raman study of L-Asparagine and L-Glutamine molecules adsorbed on aluminum films in a wide frequency range

• Published in: Semiconductor Physics Quantum Electronics & Optoelectronics
• Date: 2017
• Main Authors: Golichenko, B.O., Naseka, V.M., Strelchuk, V.V., Kolomys, O.F.
• Format: Article
• Language: English
• Published: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2017
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/214955
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Raman study of L-Asparagine and L-Glutamine molecules adsorbed on aluminum films in a wide frequency range / B.O. Golichenko, V.M. Naseka, V.V. Strelchuk, O.F. Kolomys // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2017. — Т. 20, № 3. — С. 297-304. — Бібліогр.: 20 назв. — англ.

Using micro-Raman spectroscopy, a detailed study of vibrational spectra of L-Asparagine and L-Glutamine amino acids adsorbed on aluminum foils was carried out within the frequency range 80…3500 cm⁻¹ under different excitation wavelengths. Based on a detailed analysis of Raman spectra of the above-mentioned amino acids and data of DFT calculations of normal modes and isotopic substitution for these analytes available in the literature, the interpretation of amino acids' vibrational bands was performed. The polarized Raman spectra of the studied amino acids indicate a different ordering of polycrystalline structure in distinct spots on the sample. The most significant variations of ratios between polarized bands are principally observed for deformation vibrations of NH₂, COO⁻ , and CH₂ groups within the entire “fingerprint” range and valence vibrations of CC and CN bonds within the range 1000…1100 cm⁻¹.