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Fast diffusion of the Cl- ion in the headgroup region of an oppositely charged micelle. A Cl-35 NMR spin relaxation study
KTH, Tidigare Institutioner                               , Kemi.ORCID-id: 0000-0002-0231-3970
2000 (Engelska)Ingår i: Journal of Physical Chemistry B, ISSN 1089-5647, Vol. 104, nr 35, s. 8544-8547Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Field-dependent Cl-35 spin relaxation rates have been measured in the micellar solution of C(16)TACl-D2O. The data are analyzed in terms of a fast hydration dynamics of the ion and a slower motion that consists of ion diffusion and micellar tumbling. This model provides a distinct motional correlation time of the Cl- ion from which it is concluded that, on the nanosecond time scale, the Cl- ion diffuses on the micellar surface close to its bulk diffusion speed. The hydration dynamics on the picosecond time scale differs from that in a dilute solution. These features are similar to that observed for Br- ions in the vicinity of aqueous micelles of C(16)TABr (Hedin, N.; Furo, I. J. Phys. Chem. B 1999, 103, 9640).

Ort, förlag, år, upplaga, sidor
2000. Vol. 104, nr 35, s. 8544-8547
Nyckelord [en]
quadrupolar relaxation, liquid-crystals, self-diffusion, dynamics, counterion, surface, chloride, gradient, probe, phase
Identifikatorer
URN: urn:nbn:se:kth:diva-20065ISI: 000089604700028OAI: oai:DiVA.org:kth-20065DiVA, id: diva2:338758
Anmärkning
QC 20100525Tillgänglig från: 2010-08-10 Skapad: 2010-08-10Bibliografiskt granskad

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