Effect of tetraphenylphosphonium and tetraphenylborate ions on the water structure in aqueous solutions; FTIR studies of HDO spectra

1997 ◽  
Vol 93 (19) ◽  
pp. 3463-3466 ◽  
Author(s):  
Janusz Stangret ◽  
Ewa Kamieńska-Piotrowicz
Keyword(s):  
Aqueous Solutions ◽  
Water Structure ◽  
Ftir Studies

Motions of water molecules in dilute aqueous solutions of tertiary butyl alcohol; a neutron scattering study of hydrophobic hydration

1970 ◽  
Vol 319 (1537) ◽  
pp. 189-208 ◽  
Keyword(s):  
Aqueous Solutions ◽  
Water Structure ◽  
Hydrophobic Hydration ◽  
Step Length ◽  
Solute Concentration ◽  
Butyl Alcohol ◽  
Tertiary Butyl ◽  
Self Diffusion ◽  
Dilute Aqueous Solutions ◽  
Neutron Scattering Study

Cold neutron inelastic scattering experiments have been performed on dilute aqueous solutions of (CD 3 ) 3 COH and of solutions of (CH 3 ) 3 COH in D 2 O at 21 °C. From the broadening of the quasi-elastic peak and independently determined self-diffusion coefficients ( D ), diffusive lifetimes ( c ) of H 2 O molecules have been calculated as functions of solute concentration. The product Dc is insensitive to concentration, giving a mean diffusion step length of 0.14 nm. The inelastic portion of the spectrum, reflecting lattice-like hydrogen bonding modes indicates that the solute enhances the water ‘structure’ but that such structure bears no resemblance to ice.

In-situ FTIR Studies on Self-Assembled Monolayers of Surfactant Molecules Adsorbed on H-Terminated Si(111) Surfaces in Aqueous Solutions

Langmuir ◽  
2006 ◽  
Vol 22 (4) ◽  
pp. 1706-1710 ◽  
Author(s):  
Akihito Imanishi ◽  
Ryo Omoda ◽  
Yoshihiro Nakato
Keyword(s):  
Aqueous Solutions ◽  
Self Assembled Monolayers ◽  
In Situ Ftir ◽  
Ftir Studies ◽  
Assembled Monolayers ◽  
Self Assembled

Ion solvation and water structure in potassium halide aqueous solutions

2006 ◽  
Vol 124 (3) ◽  
pp. 180-191 ◽  
Author(s):  
Alan K. Soper ◽  
Kristian Weckström
Keyword(s):  
Aqueous Solutions ◽  
Water Structure ◽  
Ion Solvation ◽  
Potassium Halide

Static Water Structure Detected by Heat Capacity Measurements on Aqueous Solutions of a Triple-Helical Polysaccharide Schizophyllan

2003 ◽  
Vol 4 (5) ◽  
pp. 1348-1356 ◽  
Author(s):  
Kazuto Yoshiba ◽  
Akio Teramoto ◽  
Naotake Nakamura ◽  
Kyo Kikuchi ◽  
Yuji Miyazaki ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Aqueous Solutions ◽  
Water Structure ◽  
Static Water ◽  
Heat Capacity Measurements

ATR-FTIR studies on the effect of strong salting-out salts on the phase separation scenario in aqueous solutions of poly(N-isopropylacrylamide) [PNIPA]

2002 ◽  
Vol 13 (10-12) ◽  
pp. 982-991 ◽  
Author(s):  
Ellina Kesselman ◽  
Ory Ramon ◽  
Ronen Berkovici ◽  
Yaron Paz
Keyword(s):  
Phase Separation ◽  
Aqueous Solutions ◽  
Salting Out ◽  
Ftir Studies

scholarly journals Why Do Tetrapropylammonium Chloride and Sulphate Salts Destabilize the Native State of Globular Proteins?

2014 ◽  
Vol 2014 ◽  
pp. 1-4
Author(s):  
Giuseppe Graziano
Keyword(s):  
Aqueous Solutions ◽  
Water Structure ◽  
Globular Proteins ◽  
Volume Effect ◽  
Statistical Thermodynamic ◽  
Water Molecules ◽  
Native State ◽  
Excluded Volume Effect ◽  
Low Charge ◽  
Sulphate Salts

It has recently been shown that aqueous solutions of tetrapropylammonium chloride and sulphate salts destabilize the folded conformation of Trp-peptides (Dempsey et al., 2011). This result is rationalized by the application of a statistical thermodynamic approach (Graziano, 2010). It is shown that the magnitude of the solvent-excluded volume effect, the main contribution for the native state stability, decreases in both aqueous 2 M TPACl solution and aqueous 1 M TPA2SO4solution. This happens because TPA+ions are so large in size and interact so weakly with water molecules, due to their very low charge density, to be able to counteract the electrostrictive effect of chloride and sulphate ions on the water structure, so that the density of their aqueous solutions is smaller or only slightly larger than that of water.

Dielectric Relaxation in Aqueous Solutions of Hydrazine and Hydrogen Peroxide:  Water Structure Implications†

2004 ◽  
Vol 108 (51) ◽  
pp. 19825-19830 ◽  
Author(s):  
Ayumi Minoguchi ◽  
Ranko Richert ◽  
C. Austen Angell
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Solutions ◽  
Dielectric Relaxation ◽  
Water Structure
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