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Deuterium NMR spectroscopy and field-induced director dynamics in liquid crystals

Deuterium NMR spectroscopy and field-induced director dynamics in liquid crystals
Deuterium NMR spectroscopy and field-induced director dynamics in liquid crystals
Deuterium NMR spectroscopy together with spectral simulations have been used to investigate the field-induced director dynamics in a nematic liquid crystal, 4-pentyl-4'-cyanobiphenyl (5CB), confined in a slab between two electrodes. The NMR spectra have been measured when turning the electric field on and turning it off. Measurements were also made at different temperatures to explore how the temperature effects the director relaxation. At higher temperatures, some complications arise as peculiar oscillations are observed in the spectra. With spectral simulation this phenomena is shown to result from the relaxation of the director on a timescale comparable to that of the experiment which is the effective spin-spin relaxation time. The simulated spectra are compared with the experimental spectra for the specifically deuteriated 5CB-d(2).
liquid crystals, director dynamics, deuterium nmr, spectral oscillations
1542-1406
353-361
Kantola, Anu M.
31648532-e3ee-4f24-8874-d109c70901d3
Luckhurst, Geoffrey R.
7807d1c6-54a1-414f-9abe-22de4d9c30f7
Timimi, Bakir A.
845f8bba-a04b-4e8d-adfe-51b13e9f29ca
Sugimura, Akihiko
d252f7e8-4859-414d-9f81-db4ec4985b03
Kantola, Anu M.
31648532-e3ee-4f24-8874-d109c70901d3
Luckhurst, Geoffrey R.
7807d1c6-54a1-414f-9abe-22de4d9c30f7
Timimi, Bakir A.
845f8bba-a04b-4e8d-adfe-51b13e9f29ca
Sugimura, Akihiko
d252f7e8-4859-414d-9f81-db4ec4985b03

Kantola, Anu M., Luckhurst, Geoffrey R., Timimi, Bakir A. and Sugimura, Akihiko (2003) Deuterium NMR spectroscopy and field-induced director dynamics in liquid crystals. Molecular Crystals and Liquid Crystals, 402, 353-361.

Record type: Article

Abstract

Deuterium NMR spectroscopy together with spectral simulations have been used to investigate the field-induced director dynamics in a nematic liquid crystal, 4-pentyl-4'-cyanobiphenyl (5CB), confined in a slab between two electrodes. The NMR spectra have been measured when turning the electric field on and turning it off. Measurements were also made at different temperatures to explore how the temperature effects the director relaxation. At higher temperatures, some complications arise as peculiar oscillations are observed in the spectra. With spectral simulation this phenomena is shown to result from the relaxation of the director on a timescale comparable to that of the experiment which is the effective spin-spin relaxation time. The simulated spectra are compared with the experimental spectra for the specifically deuteriated 5CB-d(2).

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More information

Published date: 2003
Keywords: liquid crystals, director dynamics, deuterium nmr, spectral oscillations

Identifiers

Local EPrints ID: 19990
URI: http://eprints.soton.ac.uk/id/eprint/19990
ISSN: 1542-1406
PURE UUID: 405ec65f-8774-4c80-9e08-760faa4e9a57

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Date deposited: 24 Feb 2006
Last modified: 08 Jan 2022 18:50

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Contributors

Author: Anu M. Kantola
Author: Geoffrey R. Luckhurst
Author: Bakir A. Timimi
Author: Akihiko Sugimura

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