Effect of End Groups with Aliphatic Chain or Ring Structures on the Thermal Properties and Optical Textures of Achiral and Chiral Liquid Crystal Compounds

2021 ◽  
pp. 131748
Author(s):  
Congcong Luo ◽  
Bing Yao ◽  
Jun Zhou ◽  
Hengheng Zhu ◽  
Liming Dong ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Liquid Crystal ◽  
Aliphatic Chain ◽  
Chiral Liquid Crystal ◽  
End Groups ◽  
Ring Structures ◽  
Optical Textures

Attractive mode force microscopy of chiral liquid crystal surfaces

1992 ◽  
Vol 50 (1) ◽  
pp. 268-269
Author(s):  
B.D. Terris ◽  
R. J. Twieg ◽  
C. Nguyen ◽  
G. Sigaud ◽  
H. T. Nguyen
Keyword(s):  
Liquid Crystal ◽  
Crystal Surfaces ◽  
Free Surfaces ◽  
Control Range ◽  
Force Microscopy ◽  
Liquid Crystal Films ◽  
Chiral Liquid Crystal ◽  
Crystal Films ◽  
Electrostatic Charging ◽  
And Shifts

We have used a force microscope in the attractive, or noncontact, mode to image a variety of surfaces. In this mode, the microscope tip is oscillated near its resonant frequency and shifts in this frequency due to changes in the surface-tip force gradient are detected. We have used this technique in a variety of applications to polymers, including electrostatic charging, phase separation of ionomer surfaces, and crazing of glassy films.Most recently, we have applied the force microscope to imaging the free surfaces of chiral liquid crystal films. The compounds used (Table 1) have been chosen for their polymorphic variety of fluid mesophases, all of which exist within the temperature control range of our force microscope.

Effects of Gold Nanoparticle Dispersion in a Chiral Liquid Crystal Matrix

2013 ◽  
Vol 572 (1) ◽  
pp. 59-65 ◽  
Author(s):  
M. Infusino ◽  
A. De Luca ◽  
F. Ciuchi ◽  
A. Ionescu ◽  
N. Scaramuzza ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Gold Nanoparticle ◽  
Nanoparticle Dispersion ◽  
Crystal Matrix ◽  
Chiral Liquid Crystal ◽  
Liquid Crystal Matrix

Chiral Liquid Crystal Trimer Exhibiting an Optically Uniaxial Smectic Phase with a Double-Peak Polarization

2012 ◽  
Vol 116 (15) ◽  
pp. 8678-8687 ◽  
Author(s):  
Daiki Tsuji ◽  
Yoichi Takanishi ◽  
Jun Yamamoto ◽  
Atsushi Yoshizawa
Keyword(s):  
Liquid Crystal ◽  
Smectic Phase ◽  
Double Peak ◽  
Chiral Liquid Crystal

Synthesis and properties of new (−)-menthol-derived chiral liquid crystal compounds with alkyl or alkoxy terminal groups

2016 ◽  
Vol 44 (3) ◽  
pp. 526-537 ◽  
Author(s):  
Ying-Gang Jia ◽  
Cong-Cong Luo ◽  
Zhao-Xia Zhu ◽  
Jian-She Hu
Keyword(s):  
Liquid Crystal ◽  
Chiral Liquid Crystal

The effect of aliphatic chain length on thermal properties of poly(alkylene dicarboxylate)s

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Corrado Berti ◽  
Annamaria Celli ◽  
Paola Marchese ◽  
Elisabetta Marianucci ◽  
Giancarlo Barbiroli ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Three Dimensional ◽  
The Other ◽  
Aliphatic Chain ◽  
Melting Temperatures ◽  
Avrami Analysis ◽  
Isothermal Analysis ◽  
Dimensional Growth ◽  
Crystallizing Polymers ◽  
Crystalline Forms

AbstractSome poly(alkylene dicarboxylate)s, derived from ethanediol or 1,4- butanediol and different diacids, have been synthesized and analyzed by DSC to determine the correlations existing between the thermal properties and the length of the aliphatic chain. The polymers show crystallization and melting temperatures and enthalpies which increase as the polymethylene segments lengthen, due to the formation of more stable crystals. The samples derived from ethanediol are peculiar; they show reorganization processes during the melting and the melting temperatures are notably higher with respect to those of the other polyesters. This behavior is discussed. Isothermal analysis highlights that poly(alkylene dicarboxylate)s are fast crystallizing polymers. The Avrami analysis suggests a crystallization mechanism characterized by heterogeneous nucleation and three dimensional growth; secondary crystallizations is present only in the samples characterized by short -(CH2)- sequences, due to the reorganization of less perfect crystalline forms. A comparative study between the crystallization rates as a function of the undercooling is reported.

Rheological Properties of a Chiral Liquid Crystal Exhibiting Type-II Character

2011 ◽  
Vol 547 (1) ◽  
pp. 39/[1729]-45/[1735] ◽  
Author(s):  
M. Rajeswari ◽  
J. Ananthaiah ◽  
R. Dabrowski ◽  
V. S. S. Sastry ◽  
S. Dhara ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Rheological Properties ◽  
Type Ii ◽  
Chiral Liquid Crystal

scholarly journals Synthesis of New Chiral Inducer and Preparation of Semi-Conducting Polymer Films Showing Fingerprint Structure

2014 ◽  
Vol 27 ◽  
pp. 6-12 ◽  
Author(s):  
Hiroki Hayashi ◽  
Kohsuke Kawabata ◽  
Hiromasa Goto
Keyword(s):  
Thin Film ◽  
Liquid Crystal ◽  
Surface Morphology ◽  
Optical Microscopy ◽  
Conducting Polymer ◽  
Electrolyte Solution ◽  
Cholesteric Liquid Crystal ◽  
Chiral Liquid Crystal ◽  
Conducting Polymer Films ◽  
Electrochemical Polymerisation

We synthesised a rod like shaped new chiral inducer to construct chiral liquid crystal electrolyte solution. Next, electrochemical polymerisation was carried out in the chiral liquid crystal electrolyte solution. The surface morphology of the polymers were observed with polarising optical microscopy. Synthesis of the new chiral inducer and preparation of semi-conducting thin film in the cholesteric liquid crystal electrolyte solution were performed.

Synthesis and Properties of Functionalized Sulfur-Containing Hexa-Peri-Hexabenzocoronene

2015 ◽  
Vol 1088 ◽  
pp. 290-294
Author(s):  
Ying Wang ◽  
Wen Guang Wang ◽  
Rui Cheng ◽  
Jia Ling Pu
Keyword(s):  
Thermal Properties ◽  
Liquid Crystal ◽  
Absorption Spectra ◽  
Synthesis And Characterization ◽  
Discotic Liquid Crystal ◽  
Matrix Surface ◽  
Sulfur Containing ◽  
Columnar Spacing

Synthesis and characterization of a novel hexabenzocoronene (HBC) derivative attached with four alkyl swallow-tailed chains and two sulfur-containing chains are described. The designed peripheral decoration with dove tails as solubilizer and sulfur-containing groups as functionalizer is expected to improve the solubility of molecules, change the columnar spacing stacks and make for its orientation on matrix surface. Its UV−vis absorption spectra appeared in 350-400 nm region as same as typical that of this kind of compounds. The thermal properties as discotic liquid crystal and its orientation on matrix are being studied.

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