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 (2015). Ludwig-Soret effect of aqueous solutions of ethylene glycol oligomers, crown ethers, and glycerol: Temperature, molecular weight, and hydrogen bond effect. J. Chem. Phys., 143 (12). MELVILLE: AMER INST PHYSICS. ISSN 1089-7690

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Abstract

The thermal diffusion, also called the Ludwig-Soret effect, of aqueous solutions of ethylene glycol oligomers, crown ethers, and glycerol is investigated as a function of temperature by thermal diffusion forced Rayleigh scattering. The Soret coefficient, S-T, and the thermal diffusion coefficient, D-T, show a linear temperature dependence for all studied compounds in the investigated temperature range. The magnitudes and the slopes of S-T and D-T vary with the chemical structure of the solute molecules. All studied molecules contain ether and/or hydroxyl groups, which can act as acceptor or donor to form hydrogen bonds, respectively. By introducing the number of donor and acceptor sites of each solute molecule, we can express their hydrogen bond capability. S-T and D-T can be described by an empirical equation depending on the difference of donor minus acceptor sites and the molecular weight of the solute molecule. (C) 2015 AIP Publishing LLC.

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:38-392643
DOI:	10.1063/1.4931115
Journal or Publication Title:	J. Chem. Phys.
Volume:	143
Number:	12
Date:	2015
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	1089-7690
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; POLYMER-SOLUTIONS; LATTICE MODEL; SIGN CHANGE; COEFFICIENT; THERMODIFFUSION; DEPENDENCE; NUCLEOTIDES; MIXTURES Multiple languages Chemistry, Physical; Physics, Atomic, Molecular & Chemical Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/39264