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Liquid crystal compound containing lateral trifluoromethyl group, liquid crystal mixture and display device thereof

A liquid crystal compound and compound technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of low-temperature miscibility, defects in vertical dielectrics, and not suitable for the development of high-penetration liquid crystals, etc.

Active Publication Date: 2019-05-24
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] CN201210083535.0 provides a class of cyclopentyl CF2O liquid crystal monomers, which have large dielectric anisotropy (△ε), suitable optical anisotropy (△n), and higher clearing point (CP) , low rotational viscosity (γ 1 ), but its low-temperature miscibility, vertical dielectric and other parameters still have defects, so it is not suitable for the development of high-transmission liquid crystals

Method used

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  • Liquid crystal compound containing lateral trifluoromethyl group, liquid crystal mixture and display device thereof
  • Liquid crystal compound containing lateral trifluoromethyl group, liquid crystal mixture and display device thereof
  • Liquid crystal compound containing lateral trifluoromethyl group, liquid crystal mixture and display device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129]

[0130] Put 4.54g (0.01mol) (1-a-1), 2.0g (0.011mol) (1-a-2), 20ml DMF, and 1.8g anhydrous potassium carbonate into a 50ml three-necked flask together, and keep stirring at 100°C Reacted for 3 hours, poured into 100nl water, extracted with toluene, washed the organic phase with water, distilled off the toluene, dissolved in petroleum ether, passed through a silica gel column, recrystallized twice with toluene + petroleum ether, and obtained 2.8g of product (1-a), Gc: 99.92 %

[0131] Δε: 23.8

[0132] Δn: 0.192

[0133] Cp: ​​79°C (HOST fitting)

[0134] ε ⊥ : 6.2

[0135] gamma 1 :217.

[0136] With reference to the synthetic method of Example 1, only part of the raw materials are replaced, and the following compounds can be synthesized

[0137]

[0138] Δε: 29.8

[0139] Δn: 0.182

[0140] Cp: ​​68°C (HOST fitting)

[0141] ε⊥: 6.6

[0142] Gamma 1:235.

Embodiment 2

[0165]

[0166] 24.2g (0.1mol) raw material (2-a-2), 27.06g (0.11mol) (2-a-1), 9.96g (0.12mol) anhydrous sodium carbonate, 150ml toluene, 150ml ethanol, and 120ml water 1000ml there-necked flask, add 0.5g of catalyst palladium tetrakistriphenylphosphine after slight boiling, and react under reflux under stirring for 5 hours.

[0167] Add 300ml of water, separate the water phase, wash the organic phase with water, evaporate the solvent to dryness, dissolve petroleum ether, pass through a silica gel column, and recrystallize petroleum ether 3 times to obtain 27.3g of white product (2-a) with a yield of 75%, Gc: 99.86%.

[0168] Δε: 15.8

[0169] Δn: 0.140

[0170] Cp: ​​65°C (HOST fitting)

[0171] ε⊥: 6.1.

[0172] The same synthesis method, only replacing the raw materials, can get:

[0173]

Embodiment 3

[0175]

[0176] 29g (0.12mol) (3-a-2) was dissolved in 50ml THF, 2.9g of magnesium chip was added in the 500ml there-necked bottle, 50ml THF, and the solution of (3-a-2) dissolved in 50ml THF was added dropwise under reflux, 1 Hours were added to prepare the Grignard reagent.

[0177] Add dropwise a solution of 22.2g (0.10mol) (3-a-1) dissolved in 50ml THF to the above format reagent, reflux for one hour after adding, pour into aqueous hydrochloric acid solution, add 100ml of toluene, separate the aqueous phase, and wash the organic phase with water .

[0178] Evaporate the solvent, add 150ml of toluene, add 1g of p-toluenesulfonic acid, and separate the water under reflux for about 5 hours.

[0179] Passed through a silica gel column, and recrystallized from ethanol three times to obtain 24.2 g of a white product (3-b), with a yield of 66%.

[0180] White product (3-b) 24.2g is dissolved in 200ml dehydrated alcohol, puts into palladium carbon 1g, under normal pressure hy...

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Abstract

The invention provides a liquid crystal compound shown in a first formula, and a liquid crystal mixture comprising the compound, The liquid crystal compound with the characteristics shown in the firstformula and containing the lateral trifluoromethyl group not only has positive dielectric anisotropy (delta epsilon), suitable optical anisotropy (delta n), a high clearing point (CP), outstanding low-temperature intersolubility with other liquid crystals, low rotational viscosity (gamma 1), but also has good stability to ultraviolet rays, positive stability to high temperatures, and particularlyhas high vertical dielectric (epsilon vertical), the compound can be used for preparation of various types of liquid crystal compositions, the compound particularly has the advantages of good low-temperature solubility and high vertical dielectric (epsilon vertical) .

Description

technical field [0001] The invention belongs to the field of liquid crystal compounds and applications, in particular to liquid crystal compounds and liquid crystal mixtures containing lateral trifluoromethyl groups, and liquid crystal display devices using the compounds and mixtures. Background technique [0002] Since the Austrian scientist Leinitzer first synthesized liquid crystals in 1888, the real development of the liquid crystal industry has been in the past 30 years. Due to the obvious advantages of liquid crystal display materials, such as low driving voltage, small power consumption, and reliability High, large display information, color display, no flicker, can realize flat panel display, etc., liquid crystal monomers and liquid crystal displays have experienced tremendous development, liquid crystal monomers have now synthesized more than 10,000 kinds of liquid crystal materials, of which commonly used There are thousands of liquid crystal display materials, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/12C09K19/20C09K19/30C09K19/34C09K19/44C09K19/46
CPCC09K19/0403
Inventor 梁志安鲍永锋贵丽红程建明邵哲王国芳王会芳李冉
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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