scholarly journals The peculiar optic, dielectric and X‐ray diffraction properties of a fluorinated de Vries asymmetric diffuse cone‐model ferroelectric liquid crystal

2006 ◽  
Vol 33 (1) ◽  
pp. 17-23 ◽  
Author(s):  
Jan P. F. Lagerwall ◽  
David Coleman ◽  
Eva Körblova ◽  
Chris Jones ◽  
Renfan Shao ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Ferroelectric Liquid Crystal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cone Model ◽  
De Vries

X-ray microdiffraction study of the half-V-shaped switching liquid crystal

2004 ◽  
Vol 19 (1) ◽  
pp. 53-55 ◽  
Author(s):  
Kazuhiro Takada ◽  
Takashi Noma ◽  
Takeshi Togano ◽  
Taihei Mukaide ◽  
Atsuo Iida
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Formation Process ◽  
Ferroelectric Liquid Crystal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transient Layer ◽  
Smectic C ◽  
Layer Structures ◽  
Temperature Controlled

Local layer structures and their formation process in a half-V-shaped switching ferroelectric liquid crystal (HV-FLC) were investigated by means of synchrotron X-ray microdiffraction. The HV-FLC is a FLC that has a cholesteric–chiral smectic C (Ch–SmC*) phase transition sequences. X-ray microdiffraction measurements revealed that the SmC* phase in the HV-FLC was composed of asymmetric chevron and inclined-bookshelf structures. In addition, temperature-controlled X-ray diffraction measurements showed that the transient layer structures appeared during the Ch to SmC* phase transition.

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

2003 ◽  
Vol 18 (4) ◽  
pp. 293-295 ◽  
Author(s):  
L. Dobiášová ◽  
H. Šíchová ◽  
V. Valvoda
Keyword(s):  
Liquid Crystal ◽  
Diffraction Analysis ◽  
Small Variation ◽  
Ferroelectric Liquid Crystal ◽  
X Ray Diffraction ◽  
Layer Spacing ◽  
X Ray ◽  
Temperature Range ◽  
Liquid Crystal Material ◽  
Intermolecular Distances

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.

X-ray diffraction study of phase transition of ferroelectric liquid crystal DOBAMBC

1984 ◽  
Vol 4 (3) ◽  
pp. 225-239
Author(s):  
M. Hidaka ◽  
H. Akiyama ◽  
S. Kai ◽  
M. Iwasaki
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Diffraction Study ◽  
Ferroelectric Liquid Crystal ◽  
X Ray Diffraction ◽  
X Ray

Characterization of some mesogenic alkyl 1-thioglycosides

2002 ◽  
Vol 80 (8) ◽  
pp. 1162-1165 ◽  
Author(s):  
B Henrissat ◽  
G K Hamer ◽  
M G Taylor ◽  
R H Marchessault
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Solid State ◽  
Solid State Nmr ◽  
Liquid Crystalline ◽  
Liquid Crystal Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Liquid Crystalline Phases

A series of dodecyl 1-thio-β-D-glycosides has been synthesized and characterized (DSC, NMR, CP MAS, X-ray diffraction) as possible new marking materials with liquid-crystalline properties. These compounds undergo solid to liquid crystal phase transitions at various temperatures, which depend on the nature of the carbohydrate part of the structure. Their liquid-crystalline phases show extreme shear thinning behaviour.Key words: liquid crystal, powder X-ray diffraction, phase transition, thioglycoside, solid-state NMR, marking material

Sign in / Sign up

Export Citation Format

Share Document