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Molecular dynamics in aqueous solutions of β-cyclodextrin

✍ Scribed by V. Klepko; S. Ryabov; Yu. Kercha; L. Bulavin; R. Bila; V. Slisenko; O. Vasilkevich; V. Krotenko

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
138 KB
Volume
120
Category
Article
ISSN
0167-7322

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✦ Synopsis

Water molecule mobility in ion-containing and nonionic aqueous solutions of h-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 h-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.

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