Interactions in D-fructose-1-propanol-H2O: the effect of D-fructose on themolecular organization of liquid H2O

Densities of binary aqueous solutions of D-fructose (abbreviated as FR here inafter) were determined in a much wider mole fraction range than available in literature. In contrast to hydrophobic solutes, the partial molar volum e of FR, V-FR, does not show an initial decrease on increasing the mole fra ction of FR, x(FR). In order to learn more about the effect of FR on the mo lecular organization of liquid H2O, the excess chemical potentials and part ial molar enthalpy of 1-propanol (1P) were determined in ternary 1P-FR-H2O system. Namely, the detailed thermodynamic behaviour of 1P in the ternary s ystem was used as a probe to elucidate the effect of FR on liquid H2O. In c omparison with earlier results of the temperature dependence of tert-butano l (TBA)-TBA interaction functions, addition of FR seems to have a similar e ffect of temperature increase on the molecular organization of H2O. We sugg est that addition of FR tends to decrease the global average of hydrogen bo nd probability of H2O. (C) 2000 Elsevier Science B.V. All rights reserved.