A deuterium nuclear magnetic resonance investigation of field induced director dynamics in a nematic slab subject to magnetic and pulsed electric fields
A deuterium nuclear magnetic resonance investigation of field induced director dynamics in a nematic slab subject to magnetic and pulsed electric fields
Deuterium nuclear magnetic resonance (NMR) spectroscopy has been used to investigate the field-induced director dynamics in a nematic liquid crystal, 4-pentyl-d(2)-4'-cyanobiphenyl (5CB-d(2)) deuteriated in the alpha -position of the pentyl chain, confined between two glass plates. The NMR spectra have been measured as a function of time after turning an electric field on and off It is demonstrated that the field-induced director dynamics in the nematic liquid crystal cells can be successfully time-resolved. In addition, it is found that the doubler NMR spectra become powder-like during the turn-on and rum-off processes. It is shown that the rotational viscosity and the diamagnetic anisotropy of 5CB-d(2) can be determined from the time-resolved NMR spectra by assuming uniform alignment of the director.
director dynamics, rotational viscosity, diamagnetic anisotropy, deuterium nuclear magnetic resonanceliquid-crystal, behavior, nmr
411-422
Dunn, C. J.
5ff2180f-9d08-4ca7-b196-b9fb82300ee5
Luckhurst, G. R.
923cc3f5-cc34-4c4c-8508-1fe3b83aac16
Miyamoto, T.
bd635bfc-13ea-41bd-a687-e5466a9cdbd4
Naito, H.
990b654d-7712-443d-9983-ff5b5667a2ae
Sugimura, A.
ad404617-1e0f-445f-84d4-1f7efdf57909
Timimi, B. A.
74a91aee-4af5-4938-87e3-a9f9f8584300
2000
Dunn, C. J.
5ff2180f-9d08-4ca7-b196-b9fb82300ee5
Luckhurst, G. R.
923cc3f5-cc34-4c4c-8508-1fe3b83aac16
Miyamoto, T.
bd635bfc-13ea-41bd-a687-e5466a9cdbd4
Naito, H.
990b654d-7712-443d-9983-ff5b5667a2ae
Sugimura, A.
ad404617-1e0f-445f-84d4-1f7efdf57909
Timimi, B. A.
74a91aee-4af5-4938-87e3-a9f9f8584300
Dunn, C. J., Luckhurst, G. R., Miyamoto, T., Naito, H., Sugimura, A. and Timimi, B. A.
(2000)
A deuterium nuclear magnetic resonance investigation of field induced director dynamics in a nematic slab subject to magnetic and pulsed electric fields.
Molecular Crystals and Liquid Crystals, 347, .
Abstract
Deuterium nuclear magnetic resonance (NMR) spectroscopy has been used to investigate the field-induced director dynamics in a nematic liquid crystal, 4-pentyl-d(2)-4'-cyanobiphenyl (5CB-d(2)) deuteriated in the alpha -position of the pentyl chain, confined between two glass plates. The NMR spectra have been measured as a function of time after turning an electric field on and off It is demonstrated that the field-induced director dynamics in the nematic liquid crystal cells can be successfully time-resolved. In addition, it is found that the doubler NMR spectra become powder-like during the turn-on and rum-off processes. It is shown that the rotational viscosity and the diamagnetic anisotropy of 5CB-d(2) can be determined from the time-resolved NMR spectra by assuming uniform alignment of the director.
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Published date: 2000
Keywords:
director dynamics, rotational viscosity, diamagnetic anisotropy, deuterium nuclear magnetic resonanceliquid-crystal, behavior, nmr
Identifiers
Local EPrints ID: 19042
URI: http://eprints.soton.ac.uk/id/eprint/19042
ISSN: 1542-1406
PURE UUID: bd40c879-1f62-4f99-bc21-e41c61b68760
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Date deposited: 18 Jan 2006
Last modified: 08 Jan 2022 15:48
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Contributors
Author:
C. J. Dunn
Author:
G. R. Luckhurst
Author:
T. Miyamoto
Author:
H. Naito
Author:
A. Sugimura
Author:
B. A. Timimi
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