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Solute-Solvent Cont...
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Nordstierna, LarsKTH,Fysikalisk kemi
(författare)
Solute-Solvent Contact by Intermolecular Cross Relaxation : II. The Water-Micelle Interface and the Micellar Interior
- Artikel/kapitelSvenska2006
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2006-12-07
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American Chemical Society (ACS),2006
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LIBRIS-ID:oai:DiVA.org:kth-5690
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-5690URI
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https://doi.org/10.1021/jp0647885DOI
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Språk:svenska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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Uppdaterad från submitted till published: 20100914 QC 20100914
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The intermolecular dipole-dipole cross-relaxation is measured between F-19 nuclei of sodium perfluorooctanoate in micelles and H-1 nuclei of the water solvent. The cross-relaxation rates for fluorines in the different moieties along the surfactant vary strongly by the resonance frequency in the investigated range of 188-470 MHz. This frequency dependence indicates that the cross-relaxation between water and amphiphilic aggregates is not controlled solely by the fast local water dynamics but significantly contributed to by the long-range translational diffusion of water. The cross-relaxation rates, analyzed in the framework of a model (Nordstierna, L.; Yushmanov, P. V.; Furo, I. J. Chem. Phys. 2006, 125, 074704), provide information about the dynamic retardation of water molecules by the micellar headgroup region and the location of the various moieties along the hydrophobic tail with respect to the water-micelle interface. Both intermolecular cross-relaxation and aggregation-induced F-19 chemical shift changes indicate no direct water contact to fluorines except for those closest to the head group.
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Yushmanov, Pavel V.KTH,Fysikalisk kemi(Swepub:kth)u1w5vavu
(författare)
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Furo, IstvanKTH,Fysikalisk kemi(Swepub:kth)u1a9c3pb
(författare)
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KTHFysikalisk kemi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Physical Chemistry B: American Chemical Society (ACS)110:51, s. 25775-257811520-61061520-5207
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