Impact of homeotropic and planar alignment of liquid crystalline medium on the structure and dielectric properties of modified fullerene mC60+ E25M mixtures

2012 ◽  
Vol 39 (1) ◽  
pp. 77-86 ◽  
Author(s):  
V. E. Vovk ◽  
A.V. Koval'chuk ◽  
N. Lebovka
Keyword(s):  
Dielectric Properties ◽  
Liquid Crystalline ◽  
Liquid Crystalline Medium ◽  
Crystalline Medium

scholarly journals Dielectric Properties of Strongly Polar Nematogens

2010 ◽  
Vol 65 (3) ◽  
pp. 221-230 ◽  
Author(s):  
Joanna Czub ◽  
Roman Dąbrowski ◽  
Stanisław Urban ◽  
Dorota Ziobro
Keyword(s):  
Dielectric Properties ◽  
Nematic Phase ◽  
Liquid Crystalline ◽  
Dielectric Parameters ◽  
Ring Compounds ◽  
Phenyl Rings ◽  
Pure Substances ◽  
Bridging Groups ◽  
Liquid Crystalline Medium ◽  
Crystalline Medium

Results of the static and dynamic dielectric investigations of four liquid crystalline compounds consisting of two or three phenyl rings with n-alkoxy and cyano terminals, carboxylic bridging groups, and fluoro lateral substituents in pure state and in the solution of low polar liquid crystalline medium, are presented. These compounds form the nematic phase being a monotropic one in the case of two ring compounds. The dielectric parameters are analyzed in relation to the dipolar structures of the molecules. The dielectric properties of pure substances are strongly influenced by conductivity and dimerization effects, while extracted from the data for solutions are consisted well with the structures. In the nematic phase the compounds exhibit a crossover of the principal permittivity components among the kilo and megahertz frequency range

PBLG as a versatile liquid crystalline medium for anisotropic NMR data acquisition

2019 ◽  
Vol 55 (30) ◽  
pp. 4327-4330 ◽  
Author(s):  
Ikenna E. Ndukwe ◽  
Xiao Wang ◽  
István Pelczer ◽  
Mikhail Reibarkh ◽  
R. Thomas Williamson ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Nematic Phase ◽  
Liquid Crystalline ◽  
Solvent System ◽  
High Quality ◽  
Nmr Data ◽  
Chiral Nematic ◽  
Liquid Crystalline Medium ◽  
Crystalline Medium

The chiral nematic phase of poly-γ-benzyl-l-glutamate (PBLG) formed in a chloroform–DMSO co-solvent system can be used as a versatile alignment medium for the acquisition of high quality anisotropic NMR data for molecules of varying polarities.

scholarly journals Experimental study of self-focusing in a liquid crystalline medium

1977 ◽  
Vol 14 (1) ◽  
pp. 65-77 ◽  
Author(s):  
E. G. Hanson ◽  
Y. R. Shen ◽  
G. K. L. Wong
Keyword(s):  
Experimental Study ◽  
Liquid Crystalline ◽  
Self Focusing ◽  
Liquid Crystalline Medium ◽  
Crystalline Medium

Technical aspects of dielectric spectroscopy measurements of liquid crystals

2008 ◽  
Vol 16 (3) ◽  
Author(s):  
P. Perkowski ◽  
D. Łada ◽  
K. Ogrodnik ◽  
J. Rutkowska ◽  
W. Piecek ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Dielectric Spectroscopy ◽  
Dielectric Response ◽  
Liquid Crystalline ◽  
Dielectric Measurements ◽  
Antiferroelectric Liquid Crystals ◽  
Crystalline Mixture ◽  
Relaxation Modes ◽  
Liquid Crystalline Medium ◽  
Crystalline Medium

AbstractThe dielectric spectroscopy measurements were performed for antiferroelectric liquid crystalline mixture. For this purpose, the cells with ITO electrodes were prepared. It was found that it is not possible to detect some important relaxation modes in Sm A*, Sm C*, and Sm CA* phases. The own cell mode (related to cell properties, i.e., capacity and resistivity) covers the dielectric response of liquid crystalline medium. Dielectric measurements in cells with gold electrodes were done to show all possible relaxations in antiferroelectric liquid crystals (LCs).

Structure Formation in Suspensions with a Liquid Crystalline Medium:  Percolation Phenomena

Langmuir ◽  
1998 ◽  
Vol 14 (9) ◽  
pp. 2541-2547 ◽  
Author(s):  
G. Pulla Reddy ◽  
D. K. Chokappa ◽  
V. M. Naik ◽  
D. V. Khakhar
Keyword(s):  
Structure Formation ◽  
Liquid Crystalline ◽  
Percolation Phenomena ◽  
Liquid Crystalline Medium ◽  
Crystalline Medium

Phase Transitions in Colloidal Dispersions in a Liquid Crystalline Medium

Langmuir ◽  
2000 ◽  
Vol 16 (10) ◽  
pp. 4720-4725 ◽  
Author(s):  
V. A. Raghunathan ◽  
P. Richetti ◽  
D. Roux ◽  
F. Nallet ◽  
A. K. Sood
Keyword(s):  
Phase Transitions ◽  
Liquid Crystalline ◽  
Colloidal Dispersions ◽  
Liquid Crystalline Medium ◽  
Crystalline Medium
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