✦ LIBER ✦

Influence of urea on hydrophobic phenomena in aqueous solutions of alcohols

✍ Scribed by Ewa Hawlicka; Roman Grabowski

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 546 KB
Volume: 236
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)00203-g

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✦ Synopsis

Self-diffusion coefficients of tert-butanol and n-propanol have been measured in water-rich regions of solutions containing urea at 25°C. Hydrodynamic radii of both alcohols have been calculated for varying concentrations of alcohol and urea. Hydrophobic hydration causes the formation of stable molecular aggregates. These aggregates have been observed below a certain alcohol concentration, the critical clathrate concentration. The addition of urea does not influence the critical clathrate concentration of tert-butanol, but in solutions of n-propanol this point is shifted to higher alcohol concentration.

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