Liquid crystal compound containing tetrahydropyrane ring and application of Liquid crystal compound

A technology of liquid crystal compounds and tetrahydropyran rings, applied in organic chemistry, liquid crystal materials, chemical instruments and methods, etc., can solve problems such as unobtained compounds, achieve large dielectric anisotropy, wide temperature range, drive The effect of low voltage

Active Publication Date: 2014-08-27
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] As early as 1992, German Merck Co., Ltd. described the monomeric liquid crystal with the terminal -O(CH2)nF in the patent DE4222371, but did not obtain the ideal corresponding compound

Method used

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  • Liquid crystal compound containing tetrahydropyrane ring and application of Liquid crystal compound
  • Liquid crystal compound containing tetrahydropyrane ring and application of Liquid crystal compound
  • Liquid crystal compound containing tetrahydropyrane ring and application of Liquid crystal compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Synthesis of 2-(3',5'-difluoro-4-(3-fluoropropoxy)biphenyl-4-yl)-5-propyl-tetrahydropyran (Compound 4)

[0061] 1) Synthesis of 3,5-difluoro-4-(3-fluoropropoxy)phenylboronic acid (compound 2)

[0062]

[0063] Add 10mL tetrahydrofuran to a 100mL three-necked flask, start stirring, add 1.6g magnesium chips, 2mL a solution composed of 16.1g 3,5-difluoro-4-(3-fluoropropoxy)phenylboronic acid (compound 2) and 50mL tetrahydrofuran, heat After refluxing, the reaction was initiated. After the reaction started, the remaining tetrahydrofuran solution of 3,5-difluoro-4-(3-fluoropropoxy)phenylboronic acid was added dropwise, and it took about 1.0 hour to complete the dropwise. Heat to reflux for 1 hour.

[0064] Install a thermometer and a buffer nitrogen bag in a 200mL three-necked bottle, vacuumize, replace with nitrogen three times, add 40mL tetrahydrofuran, 11.0g trimethyl borate, pass liquid nitrogen to cool down to -40°C, control the temperature -40°C ~ -50°C, add dro...

Embodiment 2

[0083] Embodiment 2 mixed crystal composition

[0084] The liquid crystal monomers used in the following compositions were all provided by Beijing Bayi Space-Time Liquid Crystal Technology Co., Ltd. Unless otherwise specified, the contents of each component in the examples represent mass percentages.

[0085] Take the following liquid crystal compounds in parts by weight and prepare a liquid crystal composition. The specific proportion and performance parameters of the obtained liquid crystal composition are shown in the table below.

[0086] With tetrahydropyran ring and -O(CH 2 ) The application of liquid crystal compounds with nF structure in TN, IPS, FFS, ADS, VA-TFT modes, the results are shown in Table 1-Table 2.

[0087] Table 1. Parts by weight and performance parameters of each component in the liquid crystal composition of the present invention

[0088]

[0089]

[0090] Table 2. Parts by weight and performance parameters of each component in the liquid crys...

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Abstract

The invention provides a liquid crystal compound containing a tetrahydropyrane ring. The liquid crystal compound has a structure shown in a formula I. The compound has the tetrahydropyrane ring and a -O(CH2)nF unit structure at the same time and has the characteristics of low rotary viscosity and great dielectric anisotropy, can further improve the dielectric anisotropy, the optical anisotropy and clearing points of the existing customary liquid crystal compound when being applied to the liquid crystal compound and has the technical effect of reducing the driving voltage and expanding the using range of temperature. After the liquid crystal compound is applied to a liquid crystal display device, the liquid crystal compound has the advantages of low driving voltage and wide using range of temperature.

Description

technical field [0001] The invention relates to the field of liquid crystal display materials, in particular to a liquid crystal compound containing a tetrahydropyran ring and an application thereof. Background technique [0002] At present, liquid crystals are widely used in the field of information display, and at the same time, some progress has been made in the application in optical communication (S.T.Wu, D.K.Yang. Reflective Liquid Crystal Displays. Wiley, 2001). In recent years, the application fields of liquid crystal compounds have been significantly expanded to various display devices, electro-optic devices, electronic components, sensors, etc. For this reason, many different structures have been proposed, especially in the field of nematic liquid crystals, and nematic liquid crystal compounds have been most widely used in flat panel displays so far. Especially for TFT active matrix systems. [0003] Liquid crystal display has experienced a long development path ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D309/06C09K19/34C09K19/44G02F1/1333
CPCC09K19/3402C09K19/44G02F1/1333
Inventor 姜天孟杭德余田会强储士红陈海光高立龙班全志
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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