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

被引:29
作者
Fischer, WB [1 ]
Eysel, HH [1 ]
机构
[1] UNIV HEIDELBERG,INST ANORGAN CHEM,D-6900 HEIDELBERG,GERMANY
关键词
Raman and FTIR difference spectroscopy; rho-spectra; water structure; amino acids; electrolytes;
D O I
10.1016/S0022-2860(97)00106-3
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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. (C) 1997 Elsevier Science B.V.
引用
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页码:249 / 257
页数:9
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