Raman and FTIR spectroscopic study on water structural changes in aqueous solutions of amino acids and related compounds

W. B. Fischer*, H. H. Eysel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Structural changes of water in aqueous solutions of glycine, alanine, ammonia, amines (methyl-, ethyl-, propyl-, and n-butylamine), carboxylic acids (formic, acetic, propionic, and n-butyric acid), KF and 1-hexansulphonic acid sodium salt have been analysed using FTIR and Raman difference spectroscopy. Isotropic and anisotropic Raman spectra, as well as the rhospectra, have been calculated. The OH stretching region of the amino acid difference spectra shows changes in defined frequency regions which can be attributed to electrostatic and hydrophobic interactions as well as to hydrogen bonding. Point charges affect the symmetry of the water molecules, while for hydrophobic interaction no symmetry changes in the water molecules are observed.

Original languageEnglish
Pages (from-to)249-257
Number of pages9
JournalJournal of Molecular Structure
Volume415
Issue number3
DOIs
StatePublished - 10 Oct 1997

Keywords

  • Amino acids
  • Electrolytes
  • Raman and FTIR difference spectroscopy
  • Rho-spectra
  • Water structure

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