VIBRATIONAL STUDY OF ASPARTIC-ACID AND GLUTAMIC-ACID DIPEPTIDES

The infrared and Raman spectra of glutamic acid dipeptide and aspartic acid dipeptide as solid samples were registered and measured. A gener al assignment for the fundamental vibrations has been proposed in the basis of previous works about their monomers and other studies on the characteristic frequencies for the peptide linkage. A correlation betw een the assignments of the two peptides was also carried out, showing similar vibrational properties.