Hydrophobic interactions in the aqueous solutions of alkan-1,2-diols. Calorimetric and spectroscopic studies at 298.15 K

1990 ◽  
Vol 86 (21) ◽  
pp. 3567 ◽  
Author(s):  
Salvatore Andini ◽  
Giuseppina Castronuovo ◽  
Vittorio Elia ◽  
Lorella Fasano
Keyword(s):  
Aqueous Solutions ◽  
Hydrophobic Interactions ◽  
Spectroscopic Studies

Vibrational spectroscopic studies of aqueous solutions of tert-butyl alcohol and tert-butylamine

2002 ◽  
Vol 80 (7) ◽  
pp. 789-795 ◽  
Author(s):  
Pius K Kipkemboi ◽  
Allan J Easteal
Keyword(s):  
Aqueous Solutions ◽  
Hydrophobic Interactions ◽  
Binary Solution ◽  
Spectroscopic Studies ◽  
Butyl Alcohol ◽  
Ir Absorption ◽  
Dilute Solutions ◽  
Tert Butyl ◽  
Tert Butyl Alcohol ◽  
Tert Butylamine

Raman and FT-IR absorption spectra of aqueous tert-butyl alcohol (t-BuOH) and tert-butylamine (t-BuNH2) in the region of the O–H and NH2 stretching and bending modes have been measured as a function of organic co-solvent concentration in the whole co-solvent mole fraction region. The major observed changes of the aqueous binary solution spectra compared with the solvent spectra are a loss or gain of band intensity. In particular, the observed changes in intensities and linewidths of some bands were significantly more pronounced at low concentrations of organic co-solvents in water, where t-BuOH and t-BuNH2 tend to integrate into the water structure. Clear evidence of structural enhancement of the network is obtained in dilute solutions as well as destruction of the network by hydrophobic interactions as the concentration is increased. Generally, the interpretation of the spectra is in agreement with the capacity of the hydrophobic co-solvent to break the structure of water in the more concentrated aqueous solutions and to enhance the structure in dilute solutions. Vibrational intensities and frequency shifts of some bands show definite trends with varying the concentration of the solutions. In the concentration-dependence study, unusual linewidth changes of certain bands were observed.Key words: infrared, Raman spectra, aqueous, tert-butanol, tert-butylamine.

scholarly journals A Note on the Nature of Ionic Hydrations and Hydrophobic Interactions in Aqueous Solutions

1979 ◽  
Vol 52 (9) ◽  
pp. 2483-2488 ◽  
Author(s):  
Kiyoshi Arakawa ◽  
Kazuo Tokiwano ◽  
Norio Ohtomo ◽  
Hisashi Uedaira
Keyword(s):  
Aqueous Solutions ◽  
Hydrophobic Interactions

scholarly journals Hydrophobic interactions for aqueous solutions of polyelectrolyte.

1987 ◽  
Vol 44 (2) ◽  
pp. 107-113
Author(s):  
Shuji MIFUNE ◽  
Kazunao KUBODERA ◽  
Motozo KANEKO
Keyword(s):  
Aqueous Solutions ◽  
Hydrophobic Interactions
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