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Molecular self-diffusion in a columnar liquid crystalline phase determined by deuterium NMR
KTH, Superseded Departments, Chemistry.ORCID iD: 0000-0002-0231-3970
2002 (English)In: 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, no 5Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
2002. Vol. 65, no 5
Keyword [en]
nuclear-magnetic-resonance, translational diffusion, discotic mesophase, spin relaxation, stimulated-echo, n-alkanoates, pgse nmr, dynamics, truxene, matter
Identifiers
URN: urn:nbn:se:kth:diva-21670DOI: 10.1103/PhysRevE.65.050702ISI: 000176552300007OAI: oai:DiVA.org:kth-21670DiVA: diva2:340368
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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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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