TY - JOUR
T1 - Raman and FTIR spectroscopic study on water structural changes in aqueous solutions of amino acids and related compounds
AU - Fischer, W. B.
AU - Eysel, H. H.
N1 - Funding Information:
The authors thank Profs. J.E. Bet-tie (University of Alberta, Canada), O.F. Nielsen (University of Copenhagen,D enmark), and R. Salzer (TU Dresden) for using their FTIR instruments,a nd also thank them for their valuable comments. We acknowledge the technical assistance and helpful discussions of I. Unverricht and Mrs. H. Herzog (TU Dresden). This work was supportedb y a grant of the DFG and by the ‘Fonds der Chemischen Industrie’.
PY - 1997/10/10
Y1 - 1997/10/10
N2 - 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.
AB - 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.
KW - Amino acids
KW - Electrolytes
KW - Raman and FTIR difference spectroscopy
KW - Rho-spectra
KW - Water structure
UR - http://www.scopus.com/inward/record.url?scp=0030660298&partnerID=8YFLogxK
U2 - 10.1016/S0022-2860(97)00106-3
DO - 10.1016/S0022-2860(97)00106-3
M3 - Article
AN - SCOPUS:0030660298
SN - 0022-2860
VL - 415
SP - 249
EP - 257
JO - Journal of Molecular Structure
JF - Journal of Molecular Structure
IS - 3
ER -