scholarly journals Preparation and Aggregation-Induced Emission of New 1,3,5-Triazine-2,4,6-tricarboxamide with Liquid Crystal Properties

2018 ◽  
Vol 34 (4) ◽  
pp. 1741-1748 ◽  
Author(s):  
ABDULHAMID UMAR ◽  
MUSTAFFA SHAMSUDDIN
Keyword(s):  
Liquid Crystal ◽  
Solid State ◽  
Liquid Crystalline ◽  
Crystalline Material ◽  
Aggregation Induced Emission ◽  
Liquid Crystal Material ◽  
Crystal Properties ◽  
Thermal Data ◽  
Active Liquid ◽  
Liquid Crystalline Material

The combination of aggregation-induced emission (AIE) and liquid crystal properties generates solid-state efficient luminescent liquid crystal materials. Here in, we reported the synthesis of 1,3,5-triazine-2,4,6-tricarboxamide and utilized it as a supramolecular organic motif for the AIE-active liquid crystal material. The compound exhibits high-intensity emission maxima at 417 and 468 nm in the solid state with excitation at 254 nm, whereas it shows weak emission in the solution phase. Also, this compound behaves as liquid crystalline material and shows columnar hexagonal mesophase with endothermic peaks at 73.4oC, 185.6oC, and exothermic peaks were observed at 181.9oC and 66.1oC with focal conic fan shape texture. The thermal data showed that the compound is stable up to 200oC.

scholarly journals A nematic to nematic transformation exhibited by a rod-like liquid crystal

2017 ◽  
Vol 19 (18) ◽  
pp. 11429-11435 ◽  
Author(s):  
Richard J. Mandle ◽  
S. J. Cowling ◽  
J. W. Goodby
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Order Phase Transition ◽  
Liquid Crystalline ◽  
Crystalline Material ◽  
First Order ◽  
First Order Phase Transition ◽  
First Order Phase ◽  
Liquid Crystalline Material

A polar, rod-like liquid crystalline material was observed to exhibit two distinct nematic mesophases separated by a first-order phase transition.

Characterization of some mesogenic alkyl 1-thioglycosides

2002 ◽  
Vol 80 (8) ◽  
pp. 1162-1165 ◽  
Author(s):  
B Henrissat ◽  
G K Hamer ◽  
M G Taylor ◽  
R H Marchessault
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Solid State ◽  
Solid State Nmr ◽  
Liquid Crystalline ◽  
Liquid Crystal Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Liquid Crystalline Phases

A series of dodecyl 1-thio-β-D-glycosides has been synthesized and characterized (DSC, NMR, CP MAS, X-ray diffraction) as possible new marking materials with liquid-crystalline properties. These compounds undergo solid to liquid crystal phase transitions at various temperatures, which depend on the nature of the carbohydrate part of the structure. Their liquid-crystalline phases show extreme shear thinning behaviour.Key words: liquid crystal, powder X-ray diffraction, phase transition, thioglycoside, solid-state NMR, marking material

scholarly journals Antiferroelectric Bent-Core Liquid Crystal for Possible High-Power Capacitors and Electrocaloric Devices

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 652
Author(s):  
Rony Saha ◽  
Chenrun Feng ◽  
Alexey Eremin ◽  
Antal Jákli
Keyword(s):  
Liquid Crystal ◽  
High Power ◽  
Liquid Crystalline ◽  
Compound A ◽  
X Ray ◽  
Liquid Crystal Material ◽  
X Ray Scattering ◽  
Liquid Crystalline Structure ◽  
Sulfur Containing

We present small-angle X-ray scattering, polarized optical microscopy and electric current measurements of a sulfur-containing bent-core liquid crystal material for characterization of the layer and director structures, thermally and electrically driven transitions between antiferroelectric and ferroelectric structures and switching properties. It was found that the material has polarization-modulated homochiral synclinic ferroelectric (SmCsPFmod), homochiral anticlinic antiferroelectric (SmCaPA) and racemic synclininc antiferroelectric (SmCsPA) structures that can be reversibly switched between each other either thermally and/or electrically. High switching polarization combined with softness of the liquid crystalline structure makes this compound a good candidate for applications in high-power capacitors and electrocaloric devices.

A New Liquid-Crystalline Material. Transition Metal-Poly(yne) Polymers

1979 ◽  
Vol 12 (5) ◽  
pp. 1016-1018 ◽  
Author(s):  
S. Takahashi ◽  
E. Murata ◽  
M. Kariya ◽  
K. Sonogashira ◽  
N. Hagihara
Keyword(s):  
Transition Metal ◽  
Liquid Crystalline ◽  
Crystalline Material ◽  
Liquid Crystalline Material
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