Abstract:
The diffusional mobility of disodium fluorescein has been measured in supercooled aqueous solutions of trehalose, a widely used cryoprotectant disaccharide. The results were analyzed on the basis of the classical continuum hydrodynamic theory (Stokes - Einstein relationship) and compared with results for the diffusion and electrical conductivity of other ionic and nonionic solutes in trehalose and sucrose aqueous solutions. Disodium fluorescein obeys the classical model over a restricted range of inverse reduced temperatures, Tg/T, scaled by the glass transition temperature. Decoupling in neutral solutes takes place at higher values of Tg/T, while in ionic solutes it occurs all over the range of Tg/T studied, as observed for the water mobility in supercooled sugar solutions. © 2008 American Chemical Society.
Registro:
Documento: |
Artículo
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Título: | Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions |
Autor: | Corti, H.R.; Frank, G.A.; Marconi, M.C. |
Filiación: | Departamento Física de Materia Condensada, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Av. General Paz 1499, 1650 San Martín, Argentina Institute de Química Física de Materiales, Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Buenos Aires, Argentina Laboratorio de Electrónica Cuántica, Departamento de Física, Ciudad Universitaria, Pabellón I, Buenos Aires, Argentina NSF ERC for Extreme Ultraviolet Science and Technology, Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80525, United States
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Palabras clave: | Electric conductivity; Fluid dynamics; Glass transition; Hydrodynamics; Ionization of liquids; Polysaccharides; Semiconductor doping; Sugar (sucrose); Sugars; Supercooling; Aqueous solutions; Classical models; Cryoprotectant; Diffusional mobilities; Electrical conductivities; Glass transition temperatures; Hydrodynamic theories; Ionic solutes; Nonionic solutes; Sugar solutions; Trehalose solutions; Water mobilities; Solutions |
Año: | 2008
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Volumen: | 112
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Número: | 41
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Página de inicio: | 12899
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Página de fin: | 12906
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DOI: |
http://dx.doi.org/10.1021/jp802806p |
Título revista: | Journal of Physical Chemistry B
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Título revista abreviado: | J Phys Chem B
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ISSN: | 15206106
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CODEN: | JPCBF
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v112_n41_p12899_Corti |
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Citas:
---------- APA ----------
Corti, H.R., Frank, G.A. & Marconi, M.C.
(2008)
. Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions. Journal of Physical Chemistry B, 112(41), 12899-12906.
http://dx.doi.org/10.1021/jp802806p---------- CHICAGO ----------
Corti, H.R., Frank, G.A., Marconi, M.C.
"Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions"
. Journal of Physical Chemistry B 112, no. 41
(2008) : 12899-12906.
http://dx.doi.org/10.1021/jp802806p---------- MLA ----------
Corti, H.R., Frank, G.A., Marconi, M.C.
"Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions"
. Journal of Physical Chemistry B, vol. 112, no. 41, 2008, pp. 12899-12906.
http://dx.doi.org/10.1021/jp802806p---------- VANCOUVER ----------
Corti, H.R., Frank, G.A., Marconi, M.C. Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions. J Phys Chem B. 2008;112(41):12899-12906.
http://dx.doi.org/10.1021/jp802806p