Wide and low angle neutron scattering of water–pyridine mixtures

Abstract Neutron scattering measurements were performed for a number of water–pyridine mixtures using hydrogen/deuterium substitution for water. Composite partial pair correlation functions were extracted using the MCGR procedure. The results show changes in the water structure compared to the pure liquid and specific water–pyridine and pyridine–pyridine interactions. There is a strong scattering at low Q -values ( −1 ) which varies with pyridine concentration. These results are interpreted in terms of spherical clusters within the water matrix.

[1]  P. Chieux,et al.  Study of Dipolar Interaction in Liquid Pyridine by X-Ray and Neutron Diffraction , 1986 .

[2]  J. Dore,et al.  Structural studies of tetrachloride liquids: II. Neutron diffraction by vanadium tetrachloride and vanadium oxytrichloride , 1979 .

[3]  R. Goldstein,et al.  Theory of multiple phase separations in binary mixtures: Phase diagrams, thermodynamic properties, and comparisons with experiments , 1983 .

[4]  G. Pálinkás,et al.  STRUCTURAL STUDIES OF A WATER/DIOXANE MIXTURE BY NEUTRON DIFFRACTION WITH HYDROGEN/DEUTERIUM SUBSTITUTION , 1999 .

[5]  I. Pápai,et al.  Hydrogen Bonding in Methyl-Substituted Pyridine−Water Complexes: A Theoretical Study , 2000 .

[6]  Anilesh Kumar,et al.  Evidence of clustering in an aqueous electrolyte solution: a small-angle X-ray scattering study , 1999 .

[7]  J. T. Edward,et al.  Molecular Volumes and the Stokes-Einstein Equation. , 1970 .

[8]  A. Soper The excluded volume effect in confined fluids and liquid mixtures , 1997 .

[9]  L. Cser,et al.  Small-angle neutron scattering in aqueous solutions of tetramethylurea , 1992 .

[10]  A. Soper,et al.  A neutron diffraction study of dimethyl sulphoxide–water mixtures , 1992 .

[11]  K. Nishikawa,et al.  Inhomogeneity of Mixing in Acetonitrile Aqueous Solution Studied by Small-Angle X-ray Scattering , 2002 .

[12]  J. Teixeira,et al.  Small-angle neutron scattering study of D2O-alcohol solutions , 1990 .

[13]  A. Soper,et al.  The effect of apolar solutes on water structure: Alcohols and tetraalkylammonium ions , 1994 .

[14]  William L. Jorgensen,et al.  Development of an all-atom force field for heterocycles. Properties of liquid pyridine and diazenes , 1998 .

[15]  A. Soper,et al.  IONIC VERSUS APOLAR BEHAVIOR OF THE TETRAMETHYLAMMONIUM ION IN WATER , 1995 .

[16]  L. Lepori,et al.  Solute–solute interactions in water. II. An analysis through the Kirkwood–Buff integrals for 14 organic solutes , 1984 .

[17]  A. Oleinikova,et al.  Structural changes of the molecular complexes of pyridines with water and demixing phenomena in aqueous solutions , 1997 .

[18]  Alan K. Soper,et al.  The radial distribution functions of water and ice from 220 to 673 K and at pressures up to 400 MPa , 2000 .

[19]  M. Klein,et al.  A molecular dynamics study of the crystalline and liquid phases of pyridine , 1989 .