Structural properties of aqueous mixtures of monohydric alcohols from near-infrared absorption spectra

✍ Scribed by G. Onori

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 440 KB
• Volume: 154
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(89)87450-0

✦ Synopsis

The 1450 nm band ofwater, usually assigned to vI + vj (Y, is the symmetric stretching and vg the asymmetric stretching mode), has been measured in aqueous methanol, ethanol and Zpropanol solutions as a function of alcohol concentration over the entire cosolvent mole fraction region. For all systems investigated, the near-infrared absorption coefftcient exhibits an anomalous behaviour which occurs in the water-rich region (mole fraction of cosolvent xr < 0.1) and shows, for each alcohol, the existence of a solvent composition, XT, for which there is a change in the nature of the interactions in solution.