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Pentacyclic liquid crystal compound having CF2O bonding group, liquid crystal composition and liquid crystal display

A liquid crystal composition and compound technology, which is applied in the field of new liquid crystal compounds and liquid crystal compositions, and can solve problems such as insufficient anisotropy of the refractive index

Active Publication Date: 2014-07-30
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the refractive index anisotropy of these compounds is not large enough

Method used

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  • Pentacyclic liquid crystal compound having CF2O bonding group, liquid crystal composition and liquid crystal display
  • Pentacyclic liquid crystal compound having CF2O bonding group, liquid crystal composition and liquid crystal display
  • Pentacyclic liquid crystal compound having CF2O bonding group, liquid crystal composition and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0250] 4-[difluoro(3,4,5-trifluorophenoxy)methyl]-4"'-pentyl-2',2",3,5-tetrafluoro-1,1',4', 1", 4", 1"'-quaterphenyl (4-[difluoro(3,4,5-trifluorophenoxy)methyl]-4"'-pentyl-2', 2", 3,5-tetrafluoro-1, Synthesis of 1', 4', 1", 4", 1"'-quaterphenyl) (No.1-4-5)

[0251]

[0252]

[0253] [Synthesis of compound (T-2)]

[0254] Under a nitrogen atmosphere, 50.0 g of 1-bromo-4-pentylbenzene (T-1), 31.4 g of 3-fluorophenylboronic acid, 91.2 g of potassium carbonate, 4.63 g of Pd(Ph 3 P) 2 Cl 2 , 150ml of toluene, 150ml of Solmix A-11 and 150ml of water, heated to reflux for 3 hours. After cooling the reaction solution to 25° C., it was poured into 500 ml of water and 500 ml of toluene, and mixed. Thereafter, it was allowed to stand still to separate into two layers, an organic layer and an aqueous layer, and an operation was performed to extract into the organic layer. The resulting organic layer was collected by separation, washed with water, and dried over anhydrous magne...

Embodiment 2

[0272] [Physical Properties of Liquid Crystal Compounds (No. 1-4-5)]

[0273] The four compounds described above as mother liquid crystal A were mixed to prepare mother liquid crystal A having a nematic phase. The physical properties of the mother liquid crystal A are as follows.

[0274] Upper limit temperature (T NI )=71.7°C; refractive index anisotropy (Δn)=0.137; dielectric constant anisotropy (Δε)=11.0.

[0275] Prepare 4-[difluoro(3,4,5-trifluorophenoxy)methyl]-4"'-pentyl-2',2 ", 3,5-tetrafluoro-1,1',4',1",4",1"'-quaterphenyl (No.1-4-5) liquid crystal composition B. Measurement of the obtained liquid crystal composition For the physical property value of B, the extrapolated value of the physical property of the liquid crystal compound (No. 1-4-5) was calculated by extrapolating the measured value. The value is as follows.

[0276] Upper limit temperature (T NI )=169°C; refractive index anisotropy (Δn)=0.257; dielectric constant anisotropy (Δε)=36.7.

[0277] From t...

Embodiment 3

[0279] 4-[Difluoro[(2,3',4',5'-tetrafluoro[1,1'-biphenyl]-4-yl)oxy]methyl]-4"-pentyl-2', Synthesis of 3,5-trifluoro-1,1',4',1"-terphenyl (No.1-3-5)

[0280]

[0281]

[0282] [Synthesis of compound (T-8)]

[0283] Under a nitrogen atmosphere, 64.0 g of 3-fluoro-4-iodo-4'-pentylbiphenyl (T-3), 30.3 g of 3,5-difluorophenylboronic acid, 73.0 g of Potassium carbonate, 0.372g of Pd / C (NX type), 200ml of toluene, 200ml of Solmix A-11 and 200ml of water were heated to reflux for 2 hours. After cooling the reaction solution to 25° C., it was poured into 600 ml of water and 400 ml of toluene, and mixed. Thereafter, it was allowed to stand still to separate into two layers, an organic layer and an aqueous layer, and an operation was performed to extract into the organic layer. The resulting organic layer was collected by separation, washed with water, and dried over anhydrous magnesium sulfate. The resulting solution was concentrated under reduced pressure, and the residue was...

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Abstract

Disclosed is a novel compound, namely a pentacyclic liquid crystal compound having a CF2O bonding group, which has general physical properties necessary for a compound, stability against heat and light, a wide temperature range of a liquid crystal phase, a high clearing point, good compatibility with other compounds, and large dielectric anisotropy and large refractive anisotropy. This pentacyclic liquid crystal compound has a particularly high clearing point and particularly large refractive anisotropy. Also disclosed are a liquid crystal composition and a liquid crystal display.

Description

technical field [0001] The present invention relates to a novel liquid crystal compound and a liquid crystal composition as materials for display elements. In detail, it is about a liquid crystal phase with a wide temperature range, high clearing point, large dielectric constant anisotropy, refractive index anisotropy, good compatibility with other liquid crystal compounds, and when used in The liquid crystal display element can be used in a wide temperature range, can be driven at low voltage, and can obtain a new type of liquid crystal compound with sharp electro-optical characteristics, and a liquid crystal display element containing the above composition. Background technique [0002] Display elements using liquid crystal compounds (In this application, the term "liquid crystal compound" refers to compounds having a liquid crystal phase and compounds that have no liquid crystal phase but can be used as constituent components of liquid crystal compositions.) are widely us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/225C07D319/06C09K19/34C09K19/20C09K19/42C09K19/30
Inventor 田中裕之
Owner JNC CORP
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