RAMAN AND IR STUDY ON THE H2O-CH3OH MIXED-SOLVENT AT 25-DEGREES-C USING FOURIER DECONVOLUTION TECHNIQUE

The intermolecular interactions in water-methanol mixed solvent have been investigated by Raman and infrared studies of the C-H and C-O stretching bands. The Fourier deconvolution method in combination with curve fitting is used to resolve the structure of the overtone of the C-H deformation vibration 2delta(s) in the Raman spectrum and the C-O band in the infrared spectrum. The changes in the intensities of the Fermi resonance doublet in the C-H stretching region of the Raman spectra and in the structure of the C-O infrared band are explained in terms of the hydrogen bonding interactions between methanol/methanol and methanol/water molecules.