Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Dibenzofuran-containing liquid crystal monomer compound and application thereof

A liquid crystal monomer and compound technology, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of insufficient dielectric constant and high threshold voltage of fluorine-containing liquid crystal materials, so as to widen the working temperature range and improve clarity Effects of Bright Spots, Large Anisotropy, and Permittivity

Active Publication Date: 2022-02-08
VALIANT CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]The fluorine-containing liquid crystal material developed in the early stage has a high threshold voltage because the dielectric constant is not large enough

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dibenzofuran-containing liquid crystal monomer compound and application thereof
  • Dibenzofuran-containing liquid crystal monomer compound and application thereof
  • Dibenzofuran-containing liquid crystal monomer compound and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The structural formula of the liquid crystal compound 3PBOUNCS is:

[0033]

[0034] Concrete synthetic route is as follows:

[0035]

[0036] Specific steps are as follows:

[0037] (1) Preparation of 3PBOUNCS-D1:

[0038] Under the protection of nitrogen, add raw materials 3-bromo-7-chlorodibenzofuran (50.0g, 0.178mol), pinacol bisborate (49.6g, 0.195mol), potassium acetate (26.1g , 0.266mol), Pd(dppf)Cl 2 (1.2996g, 1.776mmol) and 500g toluene were heated to reflux, and the water separator was divided into water and refluxed for 10 hours. After the reaction, suction filtration, desolvation of the filtrate under reduced pressure, petroleum ether recrystallization, obtained 48.6g brown solid, HPLC purity 99.3%, yield 84.1%, GC-MS (m / s): 328.

[0039] (2) Preparation of 3PBOUNCS-E1:

[0040] Under nitrogen protection, add 3PBOUNCS-D1 (30.0g, 0.091mol), 4-bromo-2,6-difluorobenzaldehyde (21.2g, 0.095mol), potassium carbonate (25.2g, 0.183mol) into a 1L three-nec...

Embodiment 2

[0050] The structural formula of the liquid crystal compound 3BOPUNCS is:

[0051]

[0052] Concrete synthetic route is as follows:

[0053]

[0054] (1) Preparation of 3BOPUNCS-B:

[0055] Under nitrogen protection, p-bromophenylboronic acid (60.2 g, 0.30 mol), pinacol (53.2 g, 0.45 mol) and 600.0 g toluene were added to a 2 L three-necked flask, and stirred at room temperature for 10 min. Then add the mixed solution of sodium carbonate (127.2g, 1.20mol) and 318.0g water, 4-bromo-2,6-difluorobenzaldehyde (72.9g, 0.33mol) and Pd (PPh 3 ) 4 (1.7334g, 0.0015mol), the temperature was raised to reflux, and the reaction was kept for 10 hours. The system was lowered to room temperature, separated, washed with water, the organic phase was collected, the solvent was removed under reduced pressure, and recrystallized three times with toluene / n-heptane to obtain 65.1g of white powder solid, GC purity 99.6%, yield 73.0%, GC-MS (m / s): 297.

[0056] (2) Preparation of 3BOPUNCS-C...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a liquid crystal monomer compound containing dibenzofuran, and belongs to the technical field of liquid crystal materials. The structural formula of the liquid crystal monomer compound is as follows: in the formula I, X and Y are independently selected from any one of phenyl, biphenyl, benzyne and biphenyl alkynyl, X and Y are the same or different, and R is any one of C1-C10 straight-chain alkyl or straight-chain alkoxy. The liquid crystal monomer compound contains a dibenzofuran rigid group, the polarity of molecules is enhanced, the product has a wide nematic phase temperature range, meanwhile, the product has high anisotropy and possibly has high resistivity, the liquid crystal monomer compound can be used as a liquid crystal component, the property of a liquid crystal material is improved, and the liquid crystal monomer compound can also be used for preparing a microwave liquid crystal antenna.

Description

technical field [0001] The invention relates to a dibenzofuran-containing liquid crystal monomer compound and an application thereof, belonging to the technical field of liquid crystal materials. Background technique [0002] Liquid crystal display (LCDS), as a display device for counters and counting clocks, first appeared in the 1970s. After more than 40 years of development, LCDS has permeated all aspects of our daily lives. At the same time, in order to meet the growing technical requirements of thin film transistor liquid crystal display (TFT-LCD), higher and higher requirements are put forward for it, such as its animation's high definition, high brightness, high response speed, wide Operating temperature range, low power consumption, low drive voltage, etc., where the performance of the liquid crystal material is critical. [0003] With the continuous development of liquid crystal materials, and liquid crystal compounds have suitable optical anisotropy (△n), dielectr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/34G02F1/1333
CPCC09K19/3405G02F1/1333C09K2219/11
Inventor 史晨笛李燕伟慈振华王元勋巨成良
Owner VALIANT CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com