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  Influence of concentration and temperature on the dynamics of water in the hydrophobic hydration shell of tetramethylurea

Tielrooij, K.-J., Hunger, J., Buchner, R., Bonn, M., & Bakker, H. J. (2010). Influence of concentration and temperature on the dynamics of water in the hydrophobic hydration shell of tetramethylurea. Journal of the American Chemical Society, 132(44), 15671-15678. doi:10.1021/ja106273w.

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 Urheber:
Tielrooij, Klaas-Jan, Autor
Hunger, Johannes1, Autor           
Buchner, Richard, Autor
Bonn, Mischa, Autor           
Bakker, Huib J, Autor
Affiliations:
1FOM Institute for Atomic and Molecular Physics [AMOLF], Netherlands, ou_persistent22              

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Schlagwörter: Hydrophobic and Hydrophilic Interactions,Methylurea Compounds,Methylurea Compounds: chemistry,Temperature,Water,Water: chemistry
 Zusammenfassung: We study the influence of the amphipilic compound tetramethylurea (TMU) on the dynamical properties of water, using dielectric relaxation spectroscopy in the regime between 0.2 GHz and 2 THz. This technique is capable of resolving different water species, their relative fractions, and their corresponding reorientation dynamics. We find that the reorientation dynamics of water molecules in the hydration shell of the hydrophobic groups of TMU is between 3 (at low concentrations) and 10 (at higher concentrations) times slower than the dynamics of bulk water. The data indicate that the effect of hydrophobic groups on water is strong but relatively short-ranged. With increasing temperature, the fraction of water contained in the hydrophobic hydration shell decreases, which implies that the overall effect of hydrophobic groups on water becomes smaller.

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 Datum: 2010-11
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1021/ja106273w
BibTex Citekey: TMUs
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Titel: Journal of the American Chemical Society
  Andere : J. Am. Chem. Soc.
  Kurztitel : JACS
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, DC : American Chemical Society
Seiten: - Band / Heft: 132 (44) Artikelnummer: - Start- / Endseite: 15671 - 15678 Identifikator: ISSN: 0002-7863
CoNE: https://pure.mpg.de/cone/journals/resource/954925376870