NDLI: Universal Concentration Dependence of the Soret Coefficient in Aqueous Systems

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Universal Concentration Dependence of the Soret Coefficient in Aqueous Systems

Content Provider	Scilit
Author	Wiegand, Simone Ning, Hui Kita, Rio
Copyright Year	2007
Description	We present measurements of aqueous low molecular weight mixtures and aqueous macromolecular solutions. The Soret coefficient $S_{T}$ for ethanol, acetone, and DMSO in water was measured by an optical grating technique, and all systems showed a sign change around a molar fraction of water $x_{water}$ = 0.85 ± 0.05. $S_{T}$ for poly(ethylene oxide), poly(N-isopropylacrylamide), and boehmite rods in ethanol/water mixtures showed also a sign change close to the same concentration. The occurring sign change concentration in the systems will be related to structural reorganizations in the solvent mixture and the Hildebrandt solubility parameter. We will also compare the experimental data within lattice calculations and simulations, which indicate that strong cross-interactions are important for a sign change of the Soret coefficient.
Related Links	http://juser.fz-juelich.de/record/58283/files/jneth_1.pdf https://core.ac.uk/download/pdf/34938959.pdf
ISSN	03400204
e-ISSN	14374358
DOI	10.1515/jnetdy.2007.011
Journal	Journal of Non-Equilibrium Thermodynamics
Issue Number	3
Volume Number	32
Language	English
Publisher	Walter de Gruyter GmbH
Publisher Date	2007-01-19
Access Restriction	Open
Subject Keyword	Journal: Journal of Non-Equilibrium Thermodynamics Journal of Non-equilibrium Thermodynamics Pharmacology and Pharmacy Soret Coefficient
Content Type	Text
Resource Type	Article
Subject	Chemistry Physics and Astronomy

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