Hostname: page-component-78c5997874-8bhkd Total loading time: 0 Render date: 2024-11-20T04:11:53.013Z Has data issue: false hasContentIssue false
  • English
  • Français

Powder X-ray diffraction analysis of the ferroelectric liquid crystal with a 2-methylbutoxypropionate unit as a function of temperature

Published online by Cambridge University Press:  05 March 2012

L. Dobiášová ,
H. Šíchová  and
V. Valvoda
L. Dobiášová
Affiliation:
Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
H. Šíchová
Affiliation:
Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
V. Valvoda*
Affiliation:
Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
*
a)Author to whom correspondence should be addressed.
Get access Rights & Permissions [Opens in a new window]

Abstract

The ferroelectric liquid crystal material [4-[(4-methyloxyfenyl) carbonyloxyl] bifenyl-4′-yl]-(S)-2-methylbutoxypropionate containing a lateral methyl group on the aromatic ring of the alkoxybenzoate unit and two chiral carbons has been investigated by X-ray powder diffraction analysis at the 28 °C–105 °C temperature range. On cooling through the SmC temperature range, the layer spacing decreases from 28.3 to 27.7 Å with a small variation of average intermolecular distances. Lattice parameters of tetragonal and monoclinic crystalline phases occurring at lower temperatures have been determined.

Keywords

liquid crystalsphase transformationtemperature dependence
Type
Technical Articles
Information
Powder Diffraction , Volume 18 , Issue 4 , December 2003 , pp. 293 - 295
Copyright
Copyright © Cambridge University Press 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Crispini, A., Ghedini, M., Morrone, S., Pucci, D. (1996). “Mesomorphic behavior, single crystal and low angle variable temperature X-ray diffraction studies of the chlorobridged cyclopalladated dimer obtained from 4,4′—hexyloxyazobenzene,” Liq. Cryst. LICRE6 20, 67–76. lic, LICRE6 CrossRefGoogle Scholar
Kašpar, M., Hamplová, V., Pakhomov, S. A., Stibor, I., Sverenyák, H., Bubnov, A. M., Glogarová, M., and Vaněk, P. (1997). “The effect of a lateral substitution on mesomorphic properties in the series of ferroelectric liquid crystals with 2-alkoxyproprionate unit,” Liq. Cryst. LICRE6 22, 557–563. lic, LICRE6 CrossRefGoogle Scholar
Kužel, R. (1995). DIFPATAN—A Program for Diffraction Pattern Analysis (Charles University, Prague).Google Scholar
Lose, D., Diele, S., Pelzl, G., Dietzmann, E., Weissflog, W. (1998). “Frustrated smectic phases in swallow-tailed compounds with perfluorinated chains,” Liq. Cryst. LICRE6 24, 707–717. lic, LICRE6 CrossRefGoogle Scholar
Obadovič, D. Ž., Bata, L., Tóth-Katona, T., Bóta, A., Fodor-Csorba, K., Vajda, A., and Stančić, M. (1997). “Structural properties of the ferroelectric liquid crystal mixures based on the homologous series of alkoxyphenyl alkoxy benzoates,” Mol. Cryst. Liq. Cryst. MCLCA5 303, 85–96. mcl, MCLCA5 CrossRefGoogle Scholar
Seddon, J. M. (1998). “Structural studies of liquid crystals by X-ray diffraction,” in Handbook of Liquid Crystals, edited by D. Demus, J. W. Gray, H.-W. Spiess, and V. Vill (Wiley-VCH, Weinheim), pp. 635–679.Google Scholar
Shi, Y., Nounesis, G., Garland, C. W., Kumar, S. (1977). “High resolution x-ray diffraction study of smectic polymorphism and fluctuations in a mixture of octyl- and decyl-oxyphenyl nitrobenzenoyloxy benzoate,” Phys. Rev. E PLEEE8 56, 5575–5584. pre, PLEEE8 CrossRefGoogle Scholar
Werner, P.-E., Ericsson, L., and Westdahl, M. (1985). “TREOR, a semi-exhaustive trial-and-error powder indexing program for all symmetries,” J. Appl. Crystallogr. JACGAR 18, 367–370. acr, JACGAR CrossRefGoogle Scholar