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Molecular self-diffusion in a columnar liquid crystalline phase determined by deuterium NMR
KTH, Tidigare Institutioner                               , Kemi.ORCID-id: 0000-0002-0231-3970
2002 (Engelska)Ingår i: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, ISSN 1063-651X, E-ISSN 1095-3787, Vol. 65, nr 5Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We report translational-diffusion coefficients in a columnar phase of a discotic liquid crystal formed by a triphenylpne-based compound. The experiments were performed using H-2 stimulated-echo-type pulsed-field-gradient spin-echo NMR applied to a chain-deuterated sample. The diffusion coefficients were found in the range of 1 x 10(-14)-4 x 10(-14) m(2)/s, three orders of magnitude lower than in the isotopic phase of the same compound. This, together with the high activation energy obtained in, columnar phase, indicates that the diffusion is dominated by solidlike jump processes.

Ort, förlag, år, upplaga, sidor
2002. Vol. 65, nr 5
Nyckelord [en]
nuclear-magnetic-resonance, translational diffusion, discotic mesophase, spin relaxation, stimulated-echo, n-alkanoates, pgse nmr, dynamics, truxene, matter
Identifikatorer
URN: urn:nbn:se:kth:diva-21670DOI: 10.1103/PhysRevE.65.050702ISI: 000176552300007Scopus ID: 2-s2.0-85035247547OAI: oai:DiVA.org:kth-21670DiVA, id: diva2:340368
Anmärkning
QC 20100525Tillgänglig från: 2010-08-10 Skapad: 2010-08-10 Senast uppdaterad: 2020-03-10Bibliografiskt granskad

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Dvinskikh, Sergey V.Furo, Istvan

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Physical Review E. Statistical, Nonlinear, and Soft Matter Physics: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

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