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Optically isotropic liquid crystal medium and optical element

A technology of optical isotropy and liquid crystal phase, applied in liquid crystal materials, optics, nonlinear optics, etc., can solve the problem of high voltage

Active Publication Date: 2011-10-12
JNC CORP +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 Document 1 to Patent Document 3 and Non-Patent Document 1 to Non-Patent Document 3, the voltage required for the operation of the device is relatively high

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0240] The liquid crystal composition of the present invention can generally be prepared by known methods, for example, a method of dissolving desired components at high temperature.

[0241] 4 Composition of liquid crystal phase with optical isotropy

[0242] 4.1 Composition of liquid crystal phase with optical isotropy

[0243] A fourth aspect of the present invention is a composition containing a compound represented by formula (1) and a chiral agent, which is a liquid crystal composition usable in an optical device driven by an optically isotropic liquid crystal phase. The liquid crystal composition is a composition showing a liquid crystal phase with optical isotropy.

[0244] Although the compound represented by formula (1) is a tetracyclic compound, it has a low clearing point, and has a large dielectric anisotropy and a large refractive index anisotropy. Therefore, in order to show excellent characteristics, The content of the compound represented by formula (1) ...

example

[0349] Since the obtained compounds were obtained by 1 The nuclear magnetic resonance spectrum obtained by H-NMR analysis, the gas chromatogram (gas chromatogram) obtained by gas chromatography (Gas Chromatography, GC) analysis, etc. are used for identification, so the analysis method will be explained first.

[0350] 1 H-NMR analysis: DRX-500 (manufactured by Bruker BioSpin Co., Ltd.) was used as a measurement device. The measurement was carried out by dissolving the sample prepared in the example etc. in CDCl 3 etc. in a deuterated solvent in which the sample can be dissolved, and carried out at room temperature at 500 MHz with 24 accumulation 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). Also, Tetramethylsilane (TMS) was used as a standard substance for the z...

Synthetic example 1

[0379] Synthesis of formula (S1-8)

[0380]

[0381] The synthesis process is shown in the figure below.

[0382]

[0383] Synthesis of compound (S1-2)

[0384] 88.3g of (S1-1) and 7.54g of catalyst, 900ml of tetrahydrofuran (Tetrahydrofuran, THF) were loaded into the reactor under nitrogen atmosphere, and 2mol / L of butylmagnesium chloride (butylmagnesium chloride) was added dropwise therein at room temperature chloride) in THF and refluxed for 4 hours. The reaction liquid was cooled to room temperature, toluene was added there, and this was washed with 1N-hydrochloric acid and water. After drying with magnesium sulfate, the solvent was distilled off under reduced pressure. Purified by silica gel column chromatography using heptane as a developing solvent, and dried under reduced pressure to obtain 75.7 g of (S1-2). The yield of (S1-2) from (S1-1) was 93.1%.

[0385] Synthesis of compound (S1-3)

[0386] Put 55.5g (S1-2) and 550ml tetrahydro...

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Abstract

A liquid crystal medium, which has a liquid crystal phase over a wide temperature range, a large refractive index anisotropy, and a large dielectric anisotropy, and exhibits an optically isotropic liquid crystal phase, is provided. The liquid crystal medium is characterized by containing a liquid crystal compound having four benzene rings and a difluoromethyleneoxy group, and a chiral reagent, and exhibiting an optically isotropic liquid crystal phase.

Description

technical field [0001] The invention relates to a liquid crystal medium which can be used as a material for an optical element. In detail, the present invention relates to a liquid crystal medium with a wider liquid crystal phase temperature range, larger dielectric anisotropy and refractive index anisotropy. Among other things, the invention relates to an optical component using the liquid crystal medium. Specifically, the present invention 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. The so-called optical element refers to various elements that utilize the electro-optical effect to perform functions such as light modulation or optical switching (optical switching), such as display elements (liquid crystal display elements), optical communication systems, optical information processing, or various A light modulating element used in a sensor system. Background tec...

Claims

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Application Information

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IPC IPC(8): C09K19/54C09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/30C09K19/32C09K19/34C09K19/38C09K19/42G02F1/13G02F1/1368
CPCC09K19/20C09K19/586C09K19/588C09K2019/0444C09K2019/0466G02F1/134363C09K2323/00
Inventor 长谷场康宏国信隆史
Owner JNC CORP
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