Universität zu Köln

Maeda, Kousaku, Shinyashiki, Naoki ORCID: 0000-0003-0486-2911, Yagihara, Shin ORCID: 0000-0003-2927-6134, Wiegand, Simone ORCID: 0000-0001-6333-1956 and Kita, Rio ORCID: 0000-0002-9683-5840 (2014). How does thermodiffusion of aqueous solutions depend on concentration and hydrophobicity? Eur. Phys. J. E, 37 (10). NEW YORK: SPRINGER. ISSN 1292-895X

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Abstract

The thermal diffusion of aqueous solutions of mono-, di-ethylene glycols, poly(ethylene glycol), methanol, and glycerol is investigated systematically as a function of concentration using the Thermal Diffusion Forced Rayleigh Scattering (TDFRS). For all investigated binary mixtures, the Soret coefficient, S (T) , decays with increasing concentration of the non-aqueous component showing two regions. For aqueous solution of ethylene glycol, at a very low solute content the decay is steep, while it becomes less steep for higher solute concentration. All mixtures show a sign change of S (T) with concentration. The sign change concentration is discussed with respect to chemical structures of solute molecules and the partition coefficient, log p . It turns out that the number of hydroxyl groups plays an important role. For the investigated aqueous mixtures, we find empirical linear relations between the sign change concentration and the ratio of the number of hydroxyl groups to the number of carbon atoms as well as the partition coefficient, log p .

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Maeda, Kousaku UNSPECIFIED UNSPECIFIED UNSPECIFIED Shinyashiki, Naoki UNSPECIFIED orcid.org/0000-0003-0486-2911 UNSPECIFIED Yagihara, Shin UNSPECIFIED orcid.org/0000-0003-2927-6134 UNSPECIFIED Wiegand, Simone UNSPECIFIED orcid.org/0000-0001-6333-1956 UNSPECIFIED Kita, Rio UNSPECIFIED orcid.org/0000-0002-9683-5840 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-425552
DOI:	10.1140/epje/i2014-14094-1
Journal or Publication Title:	Eur. Phys. J. E
Volume:	37
Number:	10
Date:	2014
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1292-895X
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FORCED RAYLEIGH-SCATTERING; THERMAL-DIFFUSION; SORET COEFFICIENT; LIQUID-MIXTURES; TEMPERATURE-DEPENDENCE; POLYMER-SOLUTIONS; BINARY-MIXTURES; MASS DIFFUSION; WATER-ETHANOL; LATTICE MODEL Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Polymer Science Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/42555