Molecular dynamics in aqueous solutions of β-cyclodextrin

Water molecule mobility in ion-containing and nonionic aqueous solutions of β-cyclodextrin was studied by quasielastic neutron scattering (QENS). The total self-diffusion coefficients and their components corresponding to the contributions from collective (Lagrange type) and single-particle (jump di...

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Bibliographic Details
Published in:Journal of molecular liquids 2005-06, Vol.120 (1), p.67-69
Main Authors: Klepko, V., Ryabov, S., Kercha, Yu, Bulavin, L., Bila, R., Slisenko, V., Vasilkevich, O., Krotenko, V.
Format: Article
Language:English
Subjects:
Quasielastic neutron scattering
Self-diffusion
β-Cyclodextrin
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Summary:Water molecule mobility in ion-containing and nonionic aqueous solutions of β-cyclodextrin was studied by quasielastic neutron scattering (QENS). The total self-diffusion coefficients and their components corresponding to the contributions from collective (Lagrange type) and single-particle (jump diffusion) parts of molecular motions were determined. From the data obtained, one can conclude that the molecular mobility of free water in nonionic aqueous solutions of β-cyclodextrin with guest molecules (2-aminopyridine) proceeds by a single-particle mechanism. The addition of Pb 2+ ions into the solution leads to increase in self-diffusion coefficients and growth of a bound water fraction.
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2004.07.082