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C-13 PGSE NMR experiment with heteronuclear dipolar decoupling to measure diffusion in liquid crystals and solids
KTH, Tidigare Institutioner                               , Kemi.ORCID-id: 0000-0002-6524-1441
KTH, Tidigare Institutioner                               , Kemi.ORCID-id: 0000-0002-0231-3970
2000 (Engelska)Ingår i: Journal of magnetic resonance, ISSN 1090-7807, E-ISSN 1096-0856, Vol. 142, nr 1, s. 102-110Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A new PGSE NMR experiment, designed to measure molecular diffusion coefficients in systems with nonvanishing static dipolar coupling, is described. The fast static dipolar dephasing of the single-quantum C-13 coherences is removed by multiple-pulse heteronuclear decoupling. The resulting slow dephasing of the C-13 coherences allows for inserting appropriate gradient pulses into the pulse sequence. The presence of the large magnetic field gradient reduces the efficiency of the decoupling sequences which is compensated for by introducing a scheme of sequential slice selection across the sample. The method is demonstrated by F-19-decoupled C-13 PGSE NMR experiments in a lyotropic nematic and lamellar liquid crystal,

Ort, förlag, år, upplaga, sidor
2000. Vol. 142, nr 1, s. 102-110
Nyckelord [en]
PGSE NMR, heteronuclear dipolar decoupling, slice selection, liquid crystals, cesium perfluorooctanoate, nuclear-magnetic-resonance, pentadecafluorooctanoate-water-system, multiple-pulse nmr, studying translational diffusion, gradient spin-echo, self-diffusion, orientational order, lamellar phases, field gradients, micelle size
Identifikatorer
URN: urn:nbn:se:kth:diva-19525ISI: 000085222700011OAI: oai:DiVA.org:kth-19525DiVA, id: diva2:338217
Anmärkning
QC 20100525Tillgänglig från: 2010-08-10 Skapad: 2010-08-10 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

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Dvinskikh, Sergey V.Furo, Istvan

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