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Novel difluoro ethylene diether liquid crystal and its composition

A compound and free technology, applied in the direction of liquid crystal materials, ether preparation, ester reaction to ether, etc.

Active Publication Date: 2013-01-30
JIANGSU HECHENG DISPLAY TECHCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 4. Low threshold voltage
[0009] However, the hybrid liquid crystal obtained in the existing technology cannot realize these advantages while maintaining other parameters

Method used

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  • Novel difluoro ethylene diether liquid crystal and its composition
  • Novel difluoro ethylene diether liquid crystal and its composition
  • Novel difluoro ethylene diether liquid crystal and its composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The synthetic route of the prepared compound HCLC-11H is shown in the following formula, and its specific process steps are as follows:

[0064]

[0065] 1) Synthesis of HCLC-11H-03

[0066] Add 6.54g procyclophenol and 180mL dimethylimide (DMF) to a 250mL three-necked flask, dissolve, add 2.04g NaH under nitrogen protection, slowly add 7.92g ethyl difluorobromoacetate, and raise the temperature to 60°C after the addition is complete React for 1 hour, post-treatment, acidify with dilute hydrochloric acid, add 180 mL of water, extract with 180 mL of ethyl acetate × 2, combine the organic phases and wash with 180 mL of water once, extract the water washing liquid once with 180 mL EA, combine all organic phases, wash with water for 3 times, and wash with brine After three times, it was dried and concentrated to obtain a crude product, which was then purified by petroleum ether column chromatography, concentrated and dried to obtain 9.7 g of HCLC-11H-03. The theoretical...

Embodiment 2

[0075] The synthetic route of the prepared compound HCLC-11J is shown in the following formula:

[0076]

[0077] The synthesis method of HCLC-11J is synthesized according to the synthesis steps of HCLC-11H, using trans-(1'-propyl-trans-4-cyclohexyl) cyclohexanol instead of propanol, and then through HCLC-11H-02 and The synthesis steps of HCLC-11H-01 are to obtain HCLC-11J-01; HCLC-11J-01 is combined with 2,3-difluoro-4-ethoxyphenol to obtain the compound HCLC-11J according to the synthesis method of HCLC-11H .

[0078] 1 H NMR (300MHz, CDCl 3 )δ6.79–6.54(m,2H),4.83(t,J=41.7Hz,2H),4.05(q,J=11.8Hz,2H),3.73–3.59(m,1H),1.93(dt,J =14.5,11.8Hz,2H),1.86–1.74(m,6H),1.50–0.99(m,18H),0.94–0.78(m,3H).

Embodiment 3

[0080] The synthetic route of the prepared compound HCLC-11M is shown in the following formula:

[0081]

[0082] Also referring to the synthesis method of HCLC-11H, 2,3-difluoro-4-ethoxyphenol was used instead of 3,4,5-trifluorophenol to react with HCLC-11J-01 to prepare compound HCLC-11M.

[0083] 1 H NMR (300MHz, CDCl 3 )δ7.50-7.21(m,2H),7.04-6.73(m,2H),6.77-6.57(m,2H),5.01(t,J=41.7Hz,2H),4.05(q,J=11.8Hz ,2H),2.53-2.28(m,1H),1.91(dt,J=15.0,11.6Hz,2H),1.79(dt,J=15.5,11.6Hz,2H),1.51-1.11(m,10H), 1.02(dt,J=15.7,11.7Hz,2H),0.93-0.82(m,3H).

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Abstract

The invention provides a novel liquid crystal compound of formula (I) containing difluoro ethylene diether. The liquid crystal compound disclosed herein has good chemical and physical stability and low birefringence, and a negative liquid crystal monomer and a liquid crystal composition which contain the structure have large dielectric anisotropy and low driving voltage. The invention further provides a liquid crystal composition of one or more liquid crystal compounds. The liquid crystal composition has good low temperature intersolubility, low birefringence and fast response time, and can be applied in liquid crystal elements containing the liquid crystal medium, especially in liquid crystal display elements containing the negative liquid crystal medium.

Description

technical field [0001] The present invention relates to a liquid crystal compound and a composition comprising the liquid crystal compound, more specifically, the present invention relates to a novel liquid crystal compound containing difluoroethylene glycol and a liquid crystal composition comprising the liquid crystal compound . Background technique [0002] Liquid crystal materials are mainly used as dielectrics in liquid crystal displays because the optical properties of such substances can be changed by an applied voltage. Electro-optical devices based on liquid crystals are extremely well known to those skilled in the art and can incorporate various effects. Examples of such devices are liquid crystal cells with dynamic scattering, DAP (Alignment Phase Distortion) liquid crystal cells, guest / host type liquid crystal cells, TN cells with twisted nematic structure, STN (super twisted nematic) liquid crystal cells, SBE ( super birefringence effect) liquid crystal cell a...

Claims

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Application Information

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IPC IPC(8): C07C43/225C07C41/16C09K19/44C09K19/42C09K19/30
Inventor 阮群奇史志兵谭玉东储著龙房元飞李鹏飞湛晶黄伟
Owner JIANGSU HECHENG DISPLAY TECHCO
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