Estimation of Nematic Order Parameters via Haller Analysis of 1H NMR Spectra of Liquid Crystals

doi:10.11938/cjmr20182685

Abstract

Abstract: The Haller relationship was applied to estimate the nematic order parameter S from ¹H NMR spectra of fully protonated liquid crystals aligned in the magnetic field. The NMR line shapes were approximated as doublets of very broad peaks. Both the temperature-dependent doublet Splitting and the full width at half maximum of the whole spectra were used for Haller extrapolation. The order parameters obtained with the proposed approach for 4-cyano-4'-pentylbiphenyl (5CB) and the nematic mixture E7 were found to be in good agreement with previously reports.

Key words: nematic liquid crystal, order parameter, Haller analysis, ¹H NMR

CLC Number:

O482.53

TANG Ming-xue, SCHMIDT Claudia. Estimation of Nematic Order Parameters via Haller Analysis of ¹H NMR Spectra of Liquid Crystals[J]. Chinese Journal of Magnetic Resonance, 2019, 36(2): 138-147.

References

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Estimation of Nematic Order Parameters via Haller Analysis of ¹H NMR Spectra of Liquid Crystals

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