Rotational dynamics of a chiral mesogen by 2H NMR study

Can it be anomalous?

R. Y. Dong, M. Cheng, K. Fodor-Csorba, C. A. Veracini

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Deuterium NMR spectroscopy is used to study. a ring-deuteriated chiral liquid crystal 4-(2-methylbutyl)oxycarbonylphenyl 4-(10-undecenyloxy)benzoate. The quadrupolar and proton-deuteron dipolar splittings, and deuteron quadrupolar and Zeeman spin-lattice relaxation times were measured as a function of temperature in the smectic A phase at two different Larmor frequencies. The derived spectral densities of motion at different temperatures were analysed simultaneously using a rotational diffusion model which also includes internal ring rotations. Motional parameters (D (is perpendicular to), D (is parallel with), D(R)) and order parameter tensors (S(zz), S(xx), - S(yy)) were obtained. Although the present data seem insufficient to draw a definitive conclusion, we believe that it is possible for this particular chiral molecule to have D (is perpendicular to) > D (is parallel with), which is different from non-chiral rod-like liquid crystals.

Original languageEnglish
Pages (from-to)1039-1043
Number of pages5
JournalLiquid Crystals
Volume27
Issue number8
Publication statusPublished - 2000

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Deuterium
Liquid crystals
deuterons
Liquid Crystals
liquid crystals
Nuclear magnetic resonance
nuclear magnetic resonance
Spin-lattice relaxation
Spectral density
rings
spin-lattice relaxation
Relaxation time
Nuclear magnetic resonance spectroscopy
Tensors
deuterium
Protons
rods
relaxation time
Benzoates
tensors

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Rotational dynamics of a chiral mesogen by 2H NMR study : Can it be anomalous? / Dong, R. Y.; Cheng, M.; Fodor-Csorba, K.; Veracini, C. A.

In: Liquid Crystals, Vol. 27, No. 8, 2000, p. 1039-1043.

Research output: Contribution to journalArticle

Dong, RY, Cheng, M, Fodor-Csorba, K & Veracini, CA 2000, 'Rotational dynamics of a chiral mesogen by 2H NMR study: Can it be anomalous?', Liquid Crystals, vol. 27, no. 8, pp. 1039-1043.
Dong, R. Y. ; Cheng, M. ; Fodor-Csorba, K. ; Veracini, C. A. / Rotational dynamics of a chiral mesogen by 2H NMR study : Can it be anomalous?. In: Liquid Crystals. 2000 ; Vol. 27, No. 8. pp. 1039-1043.
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