Hydration of methanol in aqueous solutions: a Raman spectroscopic study

S Dixit, Wilson Poon, J Crain

Research output: Contribution to journalLetterpeer-review

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 languageEnglish
Pages (from-to)L323-L328
Number of pages6
JournalJournal of Physics: Condensed Matter
Volume12
Issue number21
Publication statusPublished - 29 May 2000

Keywords

  • LIQUID METHANOL
  • C-H
  • MOLECULAR-DYNAMICS
  • WATER
  • NONCOINCIDENCE
  • MIXTURES
  • ORIGIN
  • SHIFTS
  • MODES

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