Dielectric and electrooptical properties of hockey-stick-shaped liquid crystal with a negative dielectric anisotropy
Source abstract
Abstract
Abstract We investigated dielectric properties of a hockey-stick-shaped liquid crystal (HLC). Two dielectric relaxation modes were observed at 0.91 kHz and 4.51 MHz. The low frequency relaxation modes in isotropic, smectic, and nematic phases are related to the motion of ions, collective tilt fluctuation, and rotation around the long molecular axis, respectively. Meanwhile, the high frequency relaxation modes in nematic and smectic phases was due to the rotation around the short axis of the molecules and hindered by the resistance of the ITO layers. We also examined the electrooptical response of the 5.0 wt% HLC-doped commercial nematic liquid crystal (LC) mixtures. The birefringence of the LC mixture was slightly increased, while the falling time and the rotational viscosity was decreased in the nematic phase.
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Research context
OpenAlex topics: Liquid Crystal Research Advancements · Molecular spectroscopy and chirality · Plant Reproductive Biology
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References (33)
Show source-provided references
1. Electro-optical applications of liquid crystals
2. Latticework nanostructure by chemical function transfer and molecular shape amplification of programmed reactive mesogens10.1002/adfm.201905214 ↗
3. Discotic liquid crystals: a new generation of organic semiconductors10.1039/b417320c ↗
4. Performance of a novel optical compensation film based on negative birefringence of discotic compound for wide-viewing-angle twisted-nematic liquid-crystal displays10.1143/JJAP.36.143 ↗
5. Distinct ferroelectric smectic liquid crystals consisting of banana shaped achiral molecules10.1039/jm9960601231 ↗
6. Bent-core liquid crystals: polar order,superstructural chirality and spontaneous desymmetrisation in soft matter systems10.1039/B504400F ↗
7. Polar smectic phases in quasi-bent-core liquid crystals with hockey-stick-shaped mesogen: synthesis and crossover mesomorphism10.1080/02678292.2019.1630492 ↗
8. Development of ferroelectricity in the smectic phases of 4-cyanoresorcinol derived achiral bent-core liquid crystals with long terminal alkyl chains
9. Ferroelectric and antiferroelectric smectic and columnar liquid crystalline phases formed by silylated and non-silylated molecules with fluorinated bent cores10.1021/cm061749x ↗
10. An optically isotropic antiferroelectric liquid crystal (OI‐AFLC) display mode operating over a wide temperature range using ternary bent‐core liquid crystal mixtures
11. Elastic constants, viscosity and dielectric properties of bent-core nematic liquid crystals doped with single-walled carbon nanotubes10.1080/02678292.2016.1242177 ↗
12. Structure-property correlation of a hockey stick-shaped compound exhibiting N-SmA-SmC a phase transitions10.1039/c2sm06767f ↗
13. Synthesis and characterization of luminescent hockey stick‐shaped liquid crystalline compounds10.1080/02678290500483304 ↗
14. Hockey-stick-shaped mesogens based on 1, 3, 4-thiadiazole: synthesis, mesomorphism, photophysical and DFT studies10.1080/02678292.2017.1331269 ↗
15. Pseudo-rodlike molecules with hockey-stick-shaped mesogen10.1080/02678292.2016.1189004 ↗
16. Temperature dependences of the electrooptical properties of rodlike nematic liquid crystals doped with hockey-stick-shaped liquid crystals10.3938/jkps.68.264 ↗
17. Viscoelasticity, dielectric anisotropy, and birefringence in the nematic phase of three four-ring bent-core liquid crystals with an L-shaped molecular frame10.1039/C2SM26448J ↗
18. Electro-optical and dielectric relaxation studies of an antiferroelectric liquid-crystal mixture (W-132A)10.1063/1.1968426 ↗
19. 1,2,4-oxadiazole-based bent-core liquid crystals with cybotactic nematic phases10.1002/cphc.201301070 ↗
20. Nematic phases in 1, 2, 4‐Oxadiazole‐based bent‐core liquid crystals: is there a ferroelectric switching?10.1002/adfm.201101770 ↗
21. Temperature characteristic of permittivity and splay elastic constant for fluorinated liquid crystal mixtures10.1016/j.cap.2012.11.022 ↗
22. Anomalously high dielectric relaxation strength and low frequency dielectric relaxation of a bent-core liquid crystal with a large kink angle10.1016/j.cap.2017.03.012 ↗
23. Switching and electrical properties of ferro‐and antiferroelectric phases of MOPB (H) PBC10.1080/02678290802389563 ↗
24. Chapter 4, non-chiral calamitic liquid crystals
25. Dielectric relaxation in a novel tapered chiral photochromatic liquid crystalline dendrimer10.1080/02678292.2016.1148790 ↗
26. Dielectric spectroscopy of liquid crystals. Theoretical model of ITO electrodes influence on dielectric measurements10.2478/s11772-008-0062-8 ↗
27. Dielectric properties of mixtures of a bent-core and a calamitic liquid crystal10.1103/PhysRevE.81.031711 ↗
28. Anomalously low twist and bend elastic constants in an oxadiazole-based bent-core nematic liquid crystal and its mixtures; Contributions of spontaneous chirality and polarity10.1039/C7TC04664B ↗
29. Reduced operating voltage and grey-to-grey response time in a vertically aligned liquid crystal display using a mixture of two polyimide alignment materials10.1088/0022-3727/46/48/485503 ↗
30. Fluorine in liquid crystal design for display applications10.1016/j.jfluchem.2015.01.007 ↗
31. Fluorinated liquid crystals – properties and applications10.1039/b610738a ↗
32. Enhancement of electro-optical properties of twisted nematic liquid crystals by doping aromatic hydrocarbon liquids10.1364/OE.22.030882 ↗
33. June. 43.2: new fast response time in‐plane switching liquid crystal mode