Unlock instant, AI-driven research and patent intelligence for your innovation.

Small-angle inverted V-shaped fluorine-containing lateral chain ferroelectric liquid crystal compound and synthesis method thereof

A technology of liquid crystal compounds and ferroelectricity, applied in chemical instruments and methods, preparation of imino compounds, liquid crystal materials, etc., to achieve excellent ferroelectric properties, simple synthesis method, and broad application prospects

Inactive Publication Date: 2013-02-20
BEIHANG UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this conclusion is only based on the induction and summary of historical data. The molecular model construction and ferroelectricity theory are both based on the central ring structure of 120°. There is little research on banana-shaped ferroelectric liquid crystals with small-angle central rings (less than 105°). someone involved

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
  • Small-angle inverted V-shaped fluorine-containing lateral chain ferroelectric liquid crystal compound and synthesis method thereof
  • Small-angle inverted V-shaped fluorine-containing lateral chain ferroelectric liquid crystal compound and synthesis method thereof
  • Small-angle inverted V-shaped fluorine-containing lateral chain ferroelectric liquid crystal compound and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]

[0030] 1) Synthesis of dialdehyde compound 11

[0031] In a 200ml three-necked flask, under nitrogen protection and magnetic stirring, 1,7-dihydroxynaphthalene 10 (1.00g, 6.24mmol), p-aldehyde benzoic acid 3 (2.06g, 13.72mmol), dicyclohexylcarboimide ( 3.22g, 15.60mmol), 4-dimethylaminopyridine (catalytic amount), dichloromethane solvent (100ml), react at 20°C to 50°C. TLC traced until the disappearance of the raw material, and the reaction time was 48 hours to 96 hours. The reaction solution was filtered, and most of the solvent was evaporated by a rotary evaporator, and chloroform was used as an eluent to pass through the column to obtain a white solid, which was then recrystallized with chloroform / methanol to obtain a white solid dialdehyde compound 11, as shown in the reaction formula (5) shown.

[0032]

[0033] 2) Synthesis of 2-fluoro-4-aminophenyltetradecane 14

[0034] 200ml single-necked flask, magnetically stirred, sequentially added 2-fluoro-4-nitro...

Embodiment 2

[0042]

[0043] 1) Synthesis of dialdehyde compound 11

[0044] In a 200ml three-necked flask, under nitrogen protection and magnetic stirring, 1,7-dihydroxynaphthalene 10 (1.50g, 9.36mmol), p-aldehyde benzoic acid 3 (3.37g, 22.46mmol), dicyclohexylcarboimide ( 6.74g, 32.80mmol), 4-dimethylaminopyridine (catalytic amount), dichloromethane solvent (80ml), react at 20°C to 50°C. TLC traced until the disappearance of the raw material, and the reaction time was 48 hours to 96 hours. The reaction solution was filtered, and most of the solvent was evaporated by a rotary evaporator, and chloroform was used as an eluent to pass through the column to obtain a white solid, which was then recrystallized with chloroform / methanol to obtain a white solid dialdehyde compound 11, as shown in the reaction formula (5) shown.

[0045] 2) Synthesis of 2-fluoro-4-aminophenyltetradecane 18

[0046] 200ml one-necked flask, magnetic stirring, sequentially add 2-fluoro-4-nitrothiophenol 16 (2.00...

Embodiment 3

[0054]

[0055] 1) Synthesis of dialdehyde compound 21

[0056] In a 200ml three-necked flask, under nitrogen protection and magnetic stirring, 1,7-dihydroxyanthracene 20 (1.20g, 5.70mmol), p-aldehyde benzoic acid 3 (2.57g, 17.10mmol), dicyclohexylcarboimide ( 4.70g, 22.80mmol), 4-dimethylaminopyridine (catalytic amount), dichloromethane solvent (80ml), react at 20°C to 50°C. TLC traced until the disappearance of the raw material, and the reaction time was 48 hours to 96 hours. The reaction solution was filtered, and most of the solvent was evaporated by a rotary evaporator, and a white solid was obtained by using chloroform as an eluent to pass through the column, and then recrystallized with chloroform / methanol to obtain a white solid dialdehyde compound 21, as shown in the reaction formula (12) shown.

[0057]

[0058] 2) Synthesis of 2-fluoro-4-aminophenyltetradecane 14

[0059] 200ml one-necked flask, magnetically stirred, sequentially added 2-fluoro-4-nitropheno...

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 small-angle inverted V-shaped fluorine-containing lateral chain ferroelectric liquid crystal compound and a synthesis method thereof. The compound has a molecular formula below. In the molecular formula, a 60-degree central R which may be 1,7-disubstituted naphthalene, 1,8-disubstituted anthracene, 1,8-disubstituted benzene and 1,8-disubstituted phenanthrene is adopted; a lateral chain is a Schiff alkali lateral chain, fluoros are at two positions of a terminal benzene ring; an ester group(-COO) is between the lateral chain and the central ring; and a terminal group T is an alkoxy (-OC14H29) or a alkylthio (-SC14H29). The synthesis method of the compound is simple, convenient and low in cost and has a high ferroelectric property. Vertical triangular wave electric field tests show that the compound has a characteristic single-peak reverse current and a saturated spontaneous polarization value up to 580nC / cm<2>. The material has promising application prospects in fields of optoelectronic switches, nonlinear optical second harmonic, quick response liquid crystal display and the like.

Description

technical field [0001] The invention relates to a small-angle Λ-shaped fluorine-containing side chain ferroelectric liquid crystal compound and a synthesis method thereof. Background technique [0002] The development of new displays, as the first item of China's major high-tech industrialization project, appeared in the "Government Work Report" in 2008 and 2009. As the core technology of new displays, the research on ferroelectric liquid crystal materials and liquid crystal display technology is extremely urgent. At present, the ferroelectric liquid crystal display on the market generally has the shortcomings of slow response speed and narrow viewing angle. The solution is mainly to improve the performance of the alignment film of the liquid crystal material in the display and increase the optical compensation effect from the technical aspect, and the ferroelectric liquid crystal material There is less research. [0003] The research on ferroelectric liquid crystal materi...

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 Patents(China)
IPC IPC(8): C07C323/36C07C251/24C09K19/02C09K19/32C07C249/02C07C319/20
Inventor 詹茂盛李晓东王凯
Owner BEIHANG UNIV