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Optically isotropic liquid crystalline medium, and optical element

An optical isotropic and liquid crystal phase technology, applied in optics, liquid crystal materials, nonlinear optics, etc., can solve problems such as high voltage

Inactive Publication Date: 2011-04-06
JNC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] For the optically isotropic polymer / liquid crystal composite materials disclosed in Patent Documents 1-3 and Non-Patent Documents 1-3, the voltage required for the operation of the device is high

Method used

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  • Optically isotropic liquid crystalline medium, and optical element
  • Optically isotropic liquid crystalline medium, and optical element
  • Optically isotropic liquid crystalline medium, and optical element

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0205] The preparation of the liquid crystal composition of the present invention is generally carried out by a known method, for example, a method of dissolving essential components at a high temperature.

[0206] 3 Compound (15)~Compound (19)

[0207] The third aspect of the present invention is a liquid crystal composition obtained by adding to component A a component selected from components F and G shown below.

[0208] The component that can be added to component A is preferably component F containing at least one compound selected from the group consisting of the above formulas (15), (16), (17) and (18), or containing A component obtained by mixing component G of at least one compound selected from the group consisting of the above formula (19).

[0209] In addition, among the components of the liquid crystal composition used in the present invention, analogues including isotopes of the respective elements can also be used because there is no significant difference in ...

Embodiment

[0321] Since the obtained compounds were obtained by 1 Since nuclear magnetic resonance spectra obtained by H-NMR analysis, gas chromatograms obtained by gas chromatography (GC) analysis, etc. are used for identification, the analysis method will be described first.

[0322] 1 H-NMR analysis: DRX-500 (manufactured by Bruker BioSpin Co., Ltd.) was used as a measurement device. For the measurement, the samples prepared in Examples etc. were dissolved in CDCl 3etc. in a deuterated solvent that can dissolve the sample, and at room temperature at 500 MHz with 24 cumulative times. In addition, in the description of the obtained nuclear magnetic resonance spectrum, s indicates a singlet (singlet), d indicates a doublet (doublet), t indicates a triplet (triplet), q indicates a quartet (quartet), m indicates a multiplet (multiplet). In addition, tetramethylsilane (Tetramethylsilane, TMS) was used as the standard substance of the zero point of the chemical shift δ value.

[0323] G...

Synthetic example 1

[0351] Synthesis of formula (S1-10)

[0352]

[0353] The synthesis scheme is shown in the figure below.

[0354]

[0355] Synthesis of compound (S1-4)

[0356] Put 4.0g of (S1-1) and 20ml of toluene / isooctane=1 / 1 mixed solvent into the reactor, drop 1.43g of 1,3-propanedithiol (S1-2) therein , and stirred for 30 minutes. The reaction liquid was heated to 60° C., 3.99 g of trifluoromethanesulfonic acid (S1-3) was added dropwise, and stirred at 60° C. for 1 hour and then at 90° C. for 2 hours. After cooling to room temperature, the solvent was distilled off under reduced pressure, tert-butyl methyl ether was added, and the mixture was filtered. 4.30 g of compound (S1-4) were obtained by drying the obtained solid content.

[0357] Synthesis of compound (S1-6)

[0358] 1.38 g of 3,4,5-trifluorophenol (S1-5), 1.02 g of triethylamine, and 20 ml of dichloromethane were charged into a reactor under a nitrogen atmosphere, and cooled to -70°C. A mixture of...

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Abstract

Disclosed is a liquid crystalline medium which has a wide liquid crystal phase temperature range, a high refractive index anisotropy and high dielectric anisotropy, and has an optically isotropic liquid crystal phase. The liquid crystalline medium comprises a liquid crystalline compound having a pyridine ring and a linking group -CF2O- and a chiral agent, and can exhibit an optically isotropic liquid crystal phase.

Description

technical field [0001] The present invention relates to a liquid crystal medium which can be used as a material for optical elements. More specifically, it relates to a liquid crystal medium having a wide liquid crystal phase temperature range, large dielectric anisotropy, and refractive index anisotropy. Besides, the invention relates to an optical element using the liquid crystal medium. Specifically, it relates to an optical element that can be used in a wide temperature range, can be driven at low voltage, and can obtain high-speed electro-optic response. Background technique [0002] Liquid crystal display elements using liquid crystal compositions are widely used in displays of clocks, calculators, word processors, and the like. These liquid crystal display elements utilize the refractive index anisotropy, dielectric anisotropy, etc. of liquid crystal compounds. The operating modes of liquid crystal display elements are known to mainly include phase change (Phase Ch...

Claims

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Application Information

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IPC IPC(8): C09K19/34C07D239/26C07D493/04C09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/30C09K19/32C09K19/54G02F1/13G02F1/137
CPCC09K19/0275C07D493/04C09K2019/0466C07D239/26C09K19/3458C09K19/588C09K19/544C09K2019/546C09K2019/0444C09K19/586C09K2323/00
Inventor 长谷场康宏佐乡弘毅国信隆史
Owner JNC CO LTD
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