Preprints of symposium on liquid crystals
Online ISSN : 2432-9959
Print ISSN : 1880-3539
ISSN-L : 1880-3539
23rd Symposium on Liquid Crystals
Session ID : 2PD07
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Molecular Dynamics of a Chiral Smectic Liquid Crystal, MHPOBC, as Studied by NMR Spectroscopy
*Hiromitsu SATOHKazuyuki HIRAOKAYoshiko UEMATSU
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Abstract
We have investigated the molecular dynamics in the chiral smectic phases of an antiferroelectric liquid crystal, (S)-MHPOBC, by means of solid-state13C NMR spectroscopy with CP/MAS and MASGHD techniques. In the CP/MAS spectra on heating, the half-width of an aromatic peak increases with increasing temperature in crystalline phase until it attains a maximum at about 75℃, and decrease in smectic phases. Assuming that the observed line broadening of MHPOBC occurs under the condition of ω1・τ〜1, where ω1 is a contact time and τ is a correlation time, the crrelation time (τ) of the molecular motion for the core part is estimated to be about 10-6s.
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© 1997 The Japanese Liquid Crystal Society
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