4-(OCTYLOXY)-N-(4-HEXYLPHENYL)-2-HYDROXYBENZALIMINE THERMOTROPIC COMPOUND: MORPHOLOGIC, MESOMORPHIC, THERMOTROPIC, THERMOOPTICAL AND THERMODYNAMICAL PROPERTIES

2008 ◽  
Vol 22 (03) ◽  
pp. 281-291 ◽  
Author(s):  
ARIF NESRULLAJEV ◽  
BELKIZ BILGIN ERAN ◽  
ÇIDEM YÖRÜR
Keyword(s):  
Phase Transitions ◽  
Liquid Crystalline ◽  
Crystalline Compound ◽  
Reverse Phase ◽  
Isotropic Liquid ◽  
Thermodynamical Properties ◽  
Smectic C ◽  
Nematic Mesophase ◽  
Liquid Crystalline Compound

In this work, the mesomorphic, morphologic, thermotropic, thermooptical, and thermodynamical properties of 4-(octyloxy)-N-(4-hexylphenyl)-2-hydroxybenzalimine thermotropic liquid crystalline compound, which was synthesized by our group, have been studied in detail. This compound displays smectic C and nematic mesophases. These mesophases are enantiotropic and exhibit specific confocal and schlieren textures, respectively. Thermotropic, thermooptical, and thermodynamical properties of the compound at direct and reverse phase transitions between smectic C and nematic mesophases and also between nematic mesophase and isotropic liquid have been investigated. The peculiarities of the bistable heterophase regions of these phase transitions have been studied.

EFFECT OF THICKNESS OF LIQUID CRYSTALLINE LAYER ON THE THERMOTROPIC AND THERMODYNAMICAL PROPERTIES OF NEMATIC-ISOTROPIC LIQUID AND ISTROPIC LIQUID-NEMATIC PHASE TRANSITIONS

2006 ◽  
Vol 20 (23) ◽  
pp. 3383-3394 ◽  
Author(s):  
ÖMER POLAT ◽  
ARIF NESRULLAJEV ◽  
ŞENER OKTIK
Keyword(s):  
Phase Transitions ◽  
Liquid Crystals ◽  
Interaction Energy ◽  
Nematic Phase ◽  
Liquid Crystalline ◽  
Isotropic Liquid ◽  
Crystalline Layer ◽  
Thermodynamical Properties ◽  
Work Effect

In this work, effect of thickness of the liquid crystalline layer on the morphologic, thermotropic and thermodynamical properties of the nematic–isotropic liquid and isotropic liquid–nematic phase transitions in Shiff based liquid crystals has been investigated. The shift of temperatures of the nematic–isotropic liquid and isotropic liquid–nematic phase transitions to the lower temperatures and the widening of linear and temperature widths of the heterophase regions of these phase transitions by the increase in the thickness of liquid crystalline layer have been found. The effect of thickness of liquid crystalline layer on morphologic, thermotropic and thermodynamical properties of liquid crystals under investigations is connected with change of interaction energy between liquid crystalline molecules and reference surfaces.

scholarly journals Liquid crystalline material exhibiting multiple phase transitions: morphologic properties and optical transmission

2017 ◽  
Vol 56 (4) ◽  
pp. 207-216 ◽  
Author(s):  
Arif Nesrullajev
Keyword(s):  
Phase Transitions ◽  
Liquid Crystalline ◽  
Optical Transmission ◽  
Crystalline Material ◽  
Isotropic Liquid ◽  
Smectic A ◽  
Smectic C ◽  
Multiple Phase ◽  
Temperature Dependences ◽  
Liquid Crystalline Material

Morphologic and thermo-optical properties of liquid crystalline material exhibiting multiple phase transitions were investigated in this work. Investigations were carried out for both the direct (by heating) and the reverse (by cooling) phase transitions. Thermo-morphologic properties of the heterophase regions of phase transitions were investigated. Temperature dependences of the optical transmission were studied, the mean optical density of crystalline state, smectic C, smectic A and nematic mesophases was estimated, temperature widths of the heterophase regions ofcrystal↔smectic C,smectic C↔smectic A,smectic A↔nematicandnematic↔isotropic liquidphase transitions were determined with high accuracy.

A2H NMR study of orientational order, phase transitions and dynamics in a liquid crystalline compound

1996 ◽  
Vol 21 (6) ◽  
pp. 927-932 ◽  
Author(s):  
D. Catalano ◽  
E. Ciampi ◽  
K. Fodor-Csorba ◽  
C. Forte ◽  
M. Geppi ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Liquid Crystalline ◽  
Orientational Order ◽  
Crystalline Compound ◽  
Nmr Study ◽  
Liquid Crystalline Compound
Sign in / Sign up

Export Citation Format

Share Document