title: Quasielastic neutron scattering investigation of motion of water molecules in n-propyl alcohol-water mixture.
abstract: The dynamics of water molecules in the n-propyl alcohol-water mixtures is investigated by using quasielastic neutron scattering measurements. The dynamic structure factor S(Q,E) obtained from incoherent scattering of hydrogen atoms of water is fitted with jump diffusion and relaxing cage models. The diffusion constant obtained from the relaxing cage model, which gives better fitting with S(Q,E), shows better agreement to the experimental value than that of jump diffusion model. The dependence of translational relaxation time tau(T)(Q) and stretched exponent beta(T)(Q) on the fraction of hydrophobic hydrating water molecules in the solution is discussed.
authors.affiliation: Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan. f07a024a@mail.cc.niigata-u.ac.jp
authors.forename: Masaru
authors.initials: M
authors.lastname: Nakada
authors.forename: Kenji
authors.initials: K
authors.lastname: Maruyama
authors.forename: Osamu
authors.initials: O
authors.lastname: Yamamuro
authors.forename: Masakatsu
authors.initials: M
authors.lastname: Misawa
mesh_terms: D000433:1-Propanol / Q000737:chemistry*; D045424:Complex Mixtures / Q000737:chemistry*; D004058:Diffusion; D004548:Elasticity; D009038:Motion; D033363:Neutron Diffraction; D014867:Water / Q000737:chemistry*
chemical_list: D045424:Complex Mixtures; D014867:Water; D000433:1-Propanol