Abstract
High-resolution Raman spectroscopy was used to study methanol-water mixtures over the whole concentration range. We report a highly non-linear dependence of the carbon-oxygen and carbon-hydrogen stretching frequencies with composition. The difference between the polarized and depolarized frequencies of the carbon-oxygen stretching mode (non-coincidence effect) was also measured. Taken together, the data suggest a global picture of the progressive hydration of methanol: water first breaks up the molecular chains which exist in pure methanol, and then completely hydrates the hydroxyl groups before solvating the hydrophobic methyl groups.
Original language | English |
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Pages (from-to) | L323-L328 |
Number of pages | 6 |
Journal | Journal of Physics: Condensed Matter |
Volume | 12 |
Issue number | 21 |
Publication status | Published - 29 May 2000 |
Keywords / Materials (for Non-textual outputs)
- LIQUID METHANOL
- C-H
- MOLECULAR-DYNAMICS
- WATER
- NONCOINCIDENCE
- MIXTURES
- ORIGIN
- SHIFTS
- MODES