scholarly journals A columnar liquid crystal with permanent polar order

2015 ◽  
Vol 3 (5) ◽  
pp. 985-989 ◽  
Author(s):  
J. Guilleme ◽  
J. Aragó ◽  
E. Ortí ◽  
E. Cavero ◽  
T. Sierra ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Fields ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
The Self ◽  
Polar Order ◽  
Crystalline Materials ◽  
Liquid Crystalline Materials

The self-assembly of axial dipolar subphthalocyanine molecules in the presence of electric fields leads to uniaxially oriented columnar liquid crystalline materials that exhibit permanent polarization.

scholarly journals Mesomorphism behaviour and photoluminescent properties of new asymmetrical 1,2-di(4-alkoxybenzylidene)hydrazines

2019 ◽  
Vol 43 (1-2) ◽  
pp. 67-77 ◽  
Author(s):  
Adil A Awad ◽  
Al-Ameen Bariz OmarAli ◽  
Ahmed Jasim M Al-Karawi ◽  
Zyad Hussein J Al-Qaisi ◽  
Samer Ghanim Majeed
Keyword(s):  
Differential Scanning Calorimetry ◽  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Polarized Light ◽  
Luminescent Properties ◽  
Scanning Calorimetry ◽  
Crystalline Materials ◽  
X Ray ◽  
Step Procedure ◽  
Liquid Crystalline Materials

{1-[4-( n-Alkoxy)]-2-(4’-decyloxy)benzylidene}hydrazines ( n-alkoxy = O(CH2) nH, n = 1–9, 12, 16 or 18), an asymmetrical series of 1,2-disubstituted hydrazines, were prepared in a simple two-step procedure as a part of our continuing work in evaluating hydrophobic azine compounds as photoluminescent liquid crystalline materials. The compounds were characterized spectroscopically and their liquid crystalline behaviour and luminescent properties were evaluated using polarized light optical microscopy, differential scanning calorimetry and X-ray powder diffraction techniques. The studies revealed that all of these compounds are liquid crystalline materials exhibiting photoluminescent properties in the crystalline and liquid crystal states.

scholarly journals Polar columnar assemblies of subphthalocyanines

2020 ◽  
Vol 24 (01n03) ◽  
pp. 33-42
Author(s):  
Maria J. Mayoral ◽  
Tomás Torres ◽  
David González-Rodríguez
Keyword(s):  
Electric Fields ◽  
Liquid Crystalline ◽  
Review Article ◽  
Ferroelectric Polarization ◽  
Crystalline Materials ◽  
Self Assembled ◽  
Liquid Crystalline Materials

In this small review article, we provide an overview of the different self-assembled systems and materials created so far by rationally organizing fluorosubphthalocyanines in a non-centrosymmetric fashion, which allows access to novel polarly ordered liquid crystalline materials that can be aligned in the presence of electric fields and that exhibit permanent or switchable ([Formula: see text] ferroelectric) polarization.

Controlling the Self-Assembly of Periodic Defect Patterns in Smectic Liquid Crystal Films with Electric Fields

2014 ◽  
Vol 25 (1) ◽  
pp. 142-149 ◽  
Author(s):  
Iryna Gryn ◽  
Emmanuelle Lacaze ◽  
Roberto Bartolino ◽  
Bruno Zappone
Keyword(s):  
Liquid Crystal ◽  
Electric Fields ◽  
Self Assembly ◽  
The Self ◽  
Liquid Crystal Films ◽  
Smectic Liquid Crystal ◽  
Crystal Films

scholarly journals Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

2015 ◽  
Vol 3 (31) ◽  
pp. 7993-8005 ◽  
Author(s):  
Yafei Wang ◽  
Junwei Shi ◽  
Jianhua Chen ◽  
Weiguo Zhu ◽  
Etienne Baranoff
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Recent Progress ◽  
Materials Design ◽  
Crystalline Materials ◽  
Liquid Crystalline Materials ◽  
Liquid Crystal Materials

Fluorescent and phosphorescent liquid crystalline materials are reviewed with a focus on their application in polarised OLEDs.

scholarly journals Orientation of liquid crystalline materials by using carbon nanotubes

2011 ◽  
Vol 38 (1) ◽  
pp. 37-46 ◽  
Author(s):  
N.V. Kamanina ◽  
P.Ya Vasilyev ◽  
V.I. Studeonov
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Liquid Crystalline ◽  
Light Transmission ◽  
Optical Elements ◽  
Crystalline Materials ◽  
Black Field ◽  
Display Technology ◽  
Liquid Crystalline Materials

The solution of some problems, where the initial black field is necessary for the regime of light transmission through the electrooptical organic nematic liquid crystal structures has been considered via a homeotropic alignment of liquid crystal molecules on the substrate covered by carbon nanotubes. The results of this investigation can be used to develop optical elements for displays with vertical orientations of nematic liquid crystal molecules (for example, for MVA-display technology).

Investigations of twist elastic constant K22 of new nematic liquid crystal materials using threshold IPS method

2011 ◽  
Vol 19 (1) ◽  
Author(s):  
J. Parka ◽  
M. Dąbrowski ◽  
R. Kowerdziej
Keyword(s):  
Liquid Crystal ◽  
Elastic Constant ◽  
Nematic Liquid Crystal ◽  
Elastic Constants ◽  
Liquid Crystalline ◽  
Voltage Characteristic ◽  
Crystalline Materials ◽  
Liquid Crystalline Materials ◽  
Better Than ◽  
Liquid Crystal Materials

AbstractThe liquid crystal technology is one of the most popular at the present time. To the most important parameters of liquid crystals belong optical anisotropy, viscosity, and twist elastic constants. One of the most difficult and problematic to measure parameters is a twist elastic constant K22. For new liquid crystalline materials, we have to characterize their physical properties, also a twist elastic constant K22.As a final result of this work, a twist elastic constant of new nematic liquid crystal materials was investigated. In this paper, a transmission-voltage characteristic of the in-plane switching cell was observed to find Freedericksz threshold, and then twist elastic constants could have been calculated. The method was checked on well-characterized materials E7 and 6-CHBT and its accuracy was better than 20%. In addition, the temperature dependence of K22 was determined for all materials.

Sign in / Sign up

Export Citation Format

Share Document