Journal Article

FZJ-2015-05972

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ludwig-Soret effect of aqueous solutions of ethylene glycol oligomers, crown ethers, and glycerol: Temperature, molecular weight, and hydrogen bond effect

Maeda, K. ; Shinyashiki, N. ; Yagihara, S. ; Wiegand, S.FZJ* ; Kita, R. (Corresponding author)

2015
American Institute of Physics Melville, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/18989  doi:10.1063/1.4931115

Abstract: The thermal diffusion, also called the Ludwig-Soret effect, of aqueous solutions of ethylene glycol oligomers, crown ethers, and glycerol are investigated as a function of temperature by Thermal Diffusion Forced Rayleigh Scattering (TDFRS). The Soret coefficient, $S_{\rm{T}}$, and the thermal diffusion coefficient, $D_{\rm{T}}$, show a linear temperature dependence for all studied compounds in the investigated temperature range. The magnitudes and the slopes of $S_{\rm{T}}$ and $D_{\rm{T}}$ 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. $S_{\rm{T}}$ and $D_{\rm{T}}$ can be described by an empirical equation depending on the difference of donor minus acceptors sites and the molecular weight of the solute molecule.

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Contributing Institute(s):

1. Weiche Materie (ICS-3)

Research Program(s):

1. 551 - Functional Macromolecules and Complexes (POF3-551) (POF3-551)

Appears in the scientific report 2015

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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