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Solute-Solvent Cont...
Solute-Solvent Contact by Intermolecular Cross Relaxation : I. The Nature of the Water-Hydrophobic Interface
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- Nordstierna, Lars (författare)
- KTH,Fysikalisk kemi
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- Yushmanov, Pavel V. (författare)
- KTH,Fysikalisk kemi
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- Furo, Istvan (författare)
- KTH,Fysikalisk kemi
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(creator_code:org_t)
- AIP Publishing, 2006
- 2006
- Engelska.
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Ingår i: Journal of Chemical Physics. - : AIP Publishing. - 0021-9606 .- 1089-7690. ; 125:7, s. 074704-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Intermolecular cross-relaxation rates between solute and solvent were measured by {H-1} F-19 nuclear magnetic resonance experiments in aqueous molecular solutions of ammonium perfluoro-octanoate and sodium trifluoroacetate. The experiments performed at three different magnetic fields provide frequency-dependent cross-relaxation rates which demonstrate clearly the lack of extreme narrowing for nuclear spin relaxation by diffusionally modulated intermolecular interactions. Supplemented by suitable intramolecular cross-relaxation, longitudinal relaxation, and self-diffusion data, the obtained cross-relaxation rates are evaluated within the framework of recent relaxation models and provide information about the hydrophobic hydration. In particular, water dynamics around the trifluoromethyl group in ammonium perfluoro-octanoate are more retarded than that in the smaller trifluoroacetate
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- molecular-dynamics simulation
- overhauser effect measurements
- nuclear-spin relaxation
- pair correlation-functions
- low ionic-strength
- nmr relaxation
- magnetic-resonance
- carboxylic-acids
- translational diffusion
- electronic relaxation
- Physical chemistry
- Fysikalisk kemi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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