Anisotropic self-diffusion in thermotropic liquid crystals studied by [formula presented] and [formula presented] pulse-field-gradient spin-echo NMR

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Anisotropic self-diffusion in thermotropic liquid crystals studied by [formula presented] and [formula presented] pulse-field-gradient spin-echo NMR. / Dvinskikh, S. V.; Furó, I.; Zimmermann, H.; Maliniak, A.

In: Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 65, No. 6, 10.06.2002.

Research output: Contribution to journal › Article › peer-review

Author

Dvinskikh, S. V. ; Furó, I. ; Zimmermann, H. ; Maliniak, A. / Anisotropic self-diffusion in thermotropic liquid crystals studied by [formula presented] and [formula presented] pulse-field-gradient spin-echo NMR. In: Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics. 2002 ; Vol. 65, No. 6.

BibTeX

@article{310af5727c834829bee1c4fdf974006a,

title = "Anisotropic self-diffusion in thermotropic liquid crystals studied by [formula presented] and [formula presented] pulse-field-gradient spin-echo NMR",

abstract = "The molecular self-diffusion coefficients in nematic and smectic-[formula presented] thermotropic liquid crystals are measured using stimulated-echo-type [formula presented] and [formula presented] pulse-field-gradient spin-echo nuclear magnetic resonance (PGSE NMR) combined with multiple-pulse dipolar decoupling and slice selection. The temperature dependence of the principal components of the diffusion tensor in the nematic phase follows a simple Arrhenius relationship except in the region of nematic-isotropic phase transition where it reflects, merely, the decrease of the molecular orientational order. The average of the principal diffusion coefficients in the isotropic-nematic phase transition region is close to the diffusion coefficient in the isotropic phase. At the nematic–smectic-[formula presented] phase transition the diffusion coefficients change continuously. The results in nematic phase are best described in terms of the affine transformation model for diffusion in nematics formed by hard ellipsoids. In the smectic-[formula presented] phase the data are interpreted using a modified model for diffusion in presence of a periodic potential along the director.",

author = "Dvinskikh, {S. V.} and I. Fur{\'o} and H. Zimmermann and A. Maliniak",

year = "2002",

month = jun,

day = "10",

doi = "10.1103/PhysRevE.65.061701",

language = "English",

volume = "65",

journal = "Physical Review E - Statistical, Nonlinear, and Soft Matter Physics",

issn = "1539-3755",

publisher = "American Physical Society",

number = "6",

}

RIS

TY - JOUR

T1 - Anisotropic self-diffusion in thermotropic liquid crystals studied by [formula presented] and [formula presented] pulse-field-gradient spin-echo NMR

AU - Dvinskikh, S. V.

AU - Furó, I.

AU - Zimmermann, H.

AU - Maliniak, A.

PY - 2002/6/10

Y1 - 2002/6/10

N2 - The molecular self-diffusion coefficients in nematic and smectic-[formula presented] thermotropic liquid crystals are measured using stimulated-echo-type [formula presented] and [formula presented] pulse-field-gradient spin-echo nuclear magnetic resonance (PGSE NMR) combined with multiple-pulse dipolar decoupling and slice selection. The temperature dependence of the principal components of the diffusion tensor in the nematic phase follows a simple Arrhenius relationship except in the region of nematic-isotropic phase transition where it reflects, merely, the decrease of the molecular orientational order. The average of the principal diffusion coefficients in the isotropic-nematic phase transition region is close to the diffusion coefficient in the isotropic phase. At the nematic–smectic-[formula presented] phase transition the diffusion coefficients change continuously. The results in nematic phase are best described in terms of the affine transformation model for diffusion in nematics formed by hard ellipsoids. In the smectic-[formula presented] phase the data are interpreted using a modified model for diffusion in presence of a periodic potential along the director.

AB - The molecular self-diffusion coefficients in nematic and smectic-[formula presented] thermotropic liquid crystals are measured using stimulated-echo-type [formula presented] and [formula presented] pulse-field-gradient spin-echo nuclear magnetic resonance (PGSE NMR) combined with multiple-pulse dipolar decoupling and slice selection. The temperature dependence of the principal components of the diffusion tensor in the nematic phase follows a simple Arrhenius relationship except in the region of nematic-isotropic phase transition where it reflects, merely, the decrease of the molecular orientational order. The average of the principal diffusion coefficients in the isotropic-nematic phase transition region is close to the diffusion coefficient in the isotropic phase. At the nematic–smectic-[formula presented] phase transition the diffusion coefficients change continuously. The results in nematic phase are best described in terms of the affine transformation model for diffusion in nematics formed by hard ellipsoids. In the smectic-[formula presented] phase the data are interpreted using a modified model for diffusion in presence of a periodic potential along the director.

UR - http://www.scopus.com/inward/record.url?scp=41349106122&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.65.061701

DO - 10.1103/PhysRevE.65.061701

M3 - Article

C2 - 12188745

AN - SCOPUS:41349106122

VL - 65

JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

SN - 1539-3755

IS - 6

ER -

ID: 48946681