Optically isotropic liquid crystal medium and optical device

An optical isotropic, liquid crystal composition technology, used in optics, liquid crystal materials, nonlinear optics, etc.

Inactive Publication Date: 2013-06-12
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid crystal compositions described in Patent Document 15 and Patent Document 16 are nematic liquid crystals, and there is no description about optically isotropic liquid crystals.

Method used

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  • Optically isotropic liquid crystal medium and optical device
  • Optically isotropic liquid crystal medium and optical device
  • Optically isotropic liquid crystal medium and optical device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0251] The liquid crystal composition of the present invention is usually prepared by a known method, for example, a method of dissolving essential components at high temperature.

[0252] 6 Compositions with optically isotropic liquid crystal phases

[0253] 6.1 Composition of Compositions with Optically Isotropic Liquid Crystal Phases

[0254] The sixth aspect of the present invention is a composition comprising an achiral component T and a chiral agent, and is a liquid crystal composition that can be used for an optical device driven by an optically isotropic liquid crystal phase. The achiral component T contains a component A containing compounds represented by formula (1) and formula (2) and formula (3) as addition components. The achiral component T contains, in addition to component A, a compound selected from the group consisting of the fourth component represented by formula (4) and the fifth component represented by formula (5) as needed. The liquid crystal composi...

example

[0357] The compounds obtained are based on the 1 H-NMR ( 1 H-nuclear magnetic resonance, 1 H-NMR) analysis obtained by the nuclear magnetic resonance spectrum, by gas chromatography (gas chromatography, GC) analysis obtained by gas chromatograms, etc., so the analysis method will first be described.

[0358] 1 H-NMR analysis: DRX-500 (manufactured by Bruker BioSpin Co., Ltd.) was used as a measurement device. The measurement is carried out by dissolving the sample produced in Examples etc. in a deuterated solvent such as CDCl3, which is soluble in the sample, at room temperature at 500 MHz, and the accumulation times are 24 times. In addition, in the description of the obtained nuclear magnetic resonance spectrum, s means a singlet, d means a doublet, t means a triplet, q means a quartet, and m means a multiplet. In addition, tetramethylsilane (TMS) was used as the reference substance of the zero point of the chemical shift δ value.

[0359] GC analysis: The measurement d...

Synthetic example 1

[0387] Synthesis of formula (S1-4)

[0388]

[0389] The synthesis process is shown in the figure below.

[0390]

[0391] Synthesis of compound (S1-2)

[0392] Into a reactor under a nitrogen atmosphere, 100 ml of a 1.3 mol / L tetrahydrofuran (THF) solution of isopropylmagnesium chloride and lithium chloride salt was added, and 41.6 g of compound (S1-1) was slowly added thereto at room temperature. After stirring at this temperature for 90 minutes, the reaction liquid was cooled to 0° C., a THF (30 ml) solution of 15.2 g of dimethylformamide was added dropwise, and stirred at room temperature for 12 hours. 2N-hydrochloric acid (200 ml) was dropped into the reaction liquid, 1 L of a mixed solvent of toluene / diethyl ether=1 / 1 (volume ratio) was added thereto, the product was extracted, and the organic layer was washed with water. After drying over magnesium sulfate, the solvent was distilled off under reduced pressure. Using toluene / ethyl acetate=5 / 1 (volu...

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Abstract

Provided is a liquid crystal medium which has stabilities to heat, light and so on, a wide liquid crystal phase temperature range, a large refractive index anisotropy, and a large dielectric anisotropy and which exhibits an optically isotropic liquid crystal phase. A liquid crystal composition which comprises, as the first component, an achiral component (T) containing at least one compound selected from the group consisting of compounds represented by formula (1) shown in the description [wherein R1 is C1-20 alkyl or the like; L1, L2, L3, L4, L5 and L6 are each independently hydrogen or fluorine; and X1 is halogen or the like], and contains a chiral agent, and which is characterized by exhibiting an optically isotropic liquid crystal phase.

Description

technical field [0001] The present invention relates to a liquid crystal medium useful as a material for optical elements. Specifically, the present invention relates to a liquid crystal medium having a wide temperature range of liquid crystal phase, large dielectric anisotropy, and refractive index anisotropy. Furthermore, the present invention relates to an optical element using the liquid crystal medium. More specifically, the present invention relates to a liquid crystal medium that can be used in a wide temperature range, can be driven at low voltage, and can obtain high-speed electro-optical response, and an optical element using the liquid crystal medium. 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/34C09K19/12C09K19/14C09K19/20C09K19/30C09K19/42C09K19/54G02F1/13G02F1/1334
CPCC09K19/3402C09K2019/0466C09K2019/3422C09K2323/00G02F1/1334G02F1/134363G02F1/13731G02F1/1393G02F2201/124G02F1/13793C09K19/12C09K19/14C09K19/34C09K19/54G02F1/1343
Inventor 山本真一国信隆史佐郷弘毅长谷场康宏
Owner JNC CORP
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