Analysis of linear hydrogen bonded liquid crystal binary mixtures formed between palmitic acid and p-n- alkyloxy benzoic acids

2020 ◽  
Vol 554 (1) ◽  
pp. 110-133
Author(s):  
P. Rohini ◽  
N. Pongali Sathya Prabu ◽  
M. L. N. Madhu Mohan
Keyword(s):  
Liquid Crystal ◽  
Palmitic Acid ◽  
Binary Mixtures ◽  
Benzoic Acids ◽  
Hydrogen Bonded

Calorimetric investigations of hydrogen-bonded liquid crystal binary mixtures

2018 ◽  
Vol 134 (3) ◽  
pp. 1799-1822 ◽  
Author(s):  
G. Chandrasekar ◽  
N. Pongali Sathya Prabu ◽  
M. L. N. Madhu Mohan
Keyword(s):  
Liquid Crystal ◽  
Binary Mixtures ◽  
Calorimetric Investigations ◽  
Hydrogen Bonded

Binary Mixtures of Hydrogen-Bonded Ferroelectric Liquid Crystals: Thermal Span Enhancement in Smectic X* Phase

2015 ◽  
Vol 70 (9) ◽  
pp. 757-774 ◽  
Author(s):  
Gopal Sangameswari ◽  
Nataraj Pongali Sathya Prabu ◽  
Mathukumalli Lakshmi Narayana Madhu Mohan
Keyword(s):  
Binary Mixtures ◽  
Thermal Equilibrium ◽  
Optical Microscope ◽  
Stability Factor ◽  
Benzoic Acids ◽  
Scanning Calorimetry ◽  
Ferroelectric Liquid Crystals ◽  
Binary Liquid ◽  
Smectic C ◽  
Hydrogen Bonded

AbstractThermotropic hydrogen-bonded ferroelectric binary liquid crystal mixtures comprising of N-carbamyl-l-glutamic acid (CGA) and p-n-alkyloxy benzoic acids (BAO) are investigated. Variation in the molar proportion of X and Y (where X=CGA+5BAO and Y=CGA+9BAO, CGA+10BAO, CGA+11BAO, and CGA+12BAO) comprising of four series yielded 36 binary mixtures. Optical and thermal properties of these mixtures are meticulously studied in the present article. In addition to the traditional phases, a novel smectic ordering namely smectic X* is observed in all the four series. The aim of the investigation is to obtain abundance occurrence of smectic X* with a large thermal span, and hence, the proportions of the binary mixtures are so chosen that the prelude task is accomplished. Optical tilt angle in smectic X* and smectic C* phases is experimentally determined, and a theoretical fit is performed. Phase diagrams of the four series are constructed from the data obtained from the differential scanning calorimetry and correlated with the phases recorded by the polarising optical microscope studies. Thermal stability factor and thermal equilibrium are also premeditated.

scholarly journals Hydrogen-bonded silica gels dispersed in a smectic liquid crystal: A random fieldXYsystem

2002 ◽  
Vol 65 (5) ◽  
Author(s):  
S. Park ◽  
R. L. Leheny ◽  
R. J. Birgeneau ◽  
J.-L. Gallani ◽  
C. W. Garland ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Silica Gels ◽  
Smectic Liquid Crystal ◽  
Hydrogen Bonded

A Columnar Liquid-Crystal Phase Formed by Hydrogen-Bonded Perylene Bisimide J-Aggregates

2017 ◽  
Vol 129 (8) ◽  
pp. 2194-2197 ◽  
Author(s):  
Stefanie Herbst ◽  
Bartolome Soberats ◽  
Pawaret Leowanawat ◽  
Matthias Lehmann ◽  
Frank Würthner
Keyword(s):  
Liquid Crystal ◽  
Crystal Phase ◽  
Liquid Crystal Phase ◽  
Perylene Bisimide ◽  
J Aggregates ◽  
Hydrogen Bonded
Sign in / Sign up

Export Citation Format

Share Document