Polarized Micro-Raman and FT-IR Spectra of L-Glutamine

The infrared, Raman, and polarized micro-Raman spectra of the amino acid L-glutamine and its N,N'-d₅ derivative in the crystalline state have been recorded and measured. The data obtained were used to propose a general assignment of the vibrational fundamentals on the basis of the intensity changes observed from the polarized Raman spectra, the iso-topic shifts measured from the deuterated isotopomer, and the correlations with frequencies assigned for other amino acids and related molecules.