Aromatic ring liquid crystal compound and liquid crystal composition and application thereof

A technology for liquid crystal compositions and liquid crystal compounds, applied in liquid crystal materials, chemical instruments and methods, organic chemistry, etc., can solve problems such as insufficient phase shift and high loss

Pending Publication Date: 2021-05-28
YANTAI XIANHUA CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to date, liquid crystal compounds commonly used in the visible range often suffer from disadvantageously high losses, insufficient phase shifts or too small material quality parameters.

Method used

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  • Aromatic ring liquid crystal compound and liquid crystal composition and application thereof
  • Aromatic ring liquid crystal compound and liquid crystal composition and application thereof
  • Aromatic ring liquid crystal compound and liquid crystal composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Compound Example 1: 4-propyl-7-(4-propylphenyl)-1H-indole PYn-3-3

[0117] The synthesis of intermediate Ki-1 is as follows:

[0118]

[0119] The synthesis route of the final product is as follows:

[0120]

[0121] Preparation of Step 1 I-1

[0122] Add 168g 4-propyl acetanilide in the there-necked flask. Turn on mechanical stirring, under ice water, add dropwise the pre-configured mixed acid solution (300g of concentrated sulfuric acid and 200g of 68% concentrated nitric acid) dropwise, and control the temperature below 15°C during the dropwise addition. The dropwise addition was completed in about 2 hours, and the dropwise addition was completed and kept for 30 minutes. After the reaction of the raw materials was detected, the reaction solution was poured into ice water, and the organic layer was extracted with toluene, washed with saturated aqueous sodium bicarbonate solution, and washed with saturated brine until neutral. Dry over anhydrous sodium sulfa...

Embodiment 2

[0133] Compound Example 2: 4-Propyl-7-(4-Propylphenyl)-Thiaindene PYs-3-3

[0134]

[0135] Preparation of Step 1 II-1

[0136] Under the protection of nitrogen, 131 g of diisopropylamine and 537 ml of tetrahydrofuran were added in sequence, and the stirring was started. Under the protection of nitrogen, pass liquid nitrogen to cool down. When the temperature drops to -35°C, start to add 525ml of butyl lithium (2.5M) dropwise, and control the temperature at -25~-30°C. After the heat preservation is completed, continue to pass liquid nitrogen to cool down. When the temperature drops to -70°C, add dropwise the THF solution of 3-fluoro-4-bromopropylbenzene (260g 3-fluoro-4-bromopropylbenzene+520ml THF ), the internal temperature is controlled at -70~-60°C during the dropping, and the dropping is completed in about 1 hour. After the dropwise addition is completed, keep the temperature at -70 to -60°C for 1 hour. Then, when the temperature was naturally raised to about -30°...

Embodiment 3

[0147] Compound Example 3: 4-propyl-7-(4-propylphenylethynyl)-1H-indole PTYn-3-3

[0148]

[0149]

[0150] Preparation of Step 1 III-1

[0151] Referring to the preparation method of I-1, wherein 4-propylacetanilide is replaced by 4-methylacetanilide, III-1 can be prepared.

[0152] Preparation of Step 2 III-2

[0153] Referring to the preparation method of I-2, wherein I-1 is replaced by III-1, III-2 can be prepared.

[0154] Preparation of Step 3 III-3

[0155] Referring to the preparation method of III-2, wherein I-2 is replaced by III-2, III-3 can be prepared.

[0156] Step 4 Preparation of Ki-3

[0157] Referring to the preparation method of Ki-1, where I-3 is replaced by III-3, Ki-3 can be prepared.

[0158] Preparation of step 5 PTYn-3-3

[0159]Under the protection of nitrogen, add 70g of Ki-3 prepared in step 4, 150ml of triethylamine, 300ml of toluene, 54g of triphenylphosphine, and 3.5g of cuprous iodide to the three-necked flask prepared in step 4, h...

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PUM

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Abstract

The invention relates to an aromatic ring liquid crystal compound, a liquid crystal composition and an assembly suitable for a microwave region and a millimeter wave region of a high-frequency technology or an electromagnetic spectrum, and particularly a phase shifter and a microwave array antenna. The liquid crystal composition provided by the invention at least comprises a compound represented by a general formula I. The liquid crystal composition provided by the invention is good in stability, high in response speed and wide in liquid crystal phase temperature range.

Description

technical field [0001] The invention relates to the field of liquid crystal materials, and relates to a liquid crystal medium applied to components in the microwave region and the millimeter wave region of the high-frequency technology or the electromagnetic spectrum, especially a phase shifter and a microwave array antenna, specifically an aromatic ring liquid crystal compound and a liquid crystal combination thereof objects and applications. Background technique [0002] Information is the foundation of today's social development. Huge amounts of information are generated, stored and transmitted every moment. Communication technology is an important technology in the information age and plays a vital role in today's social development. Modern communication technology is mainly divided into wired and wireless communication. With the development and application of Internet, Internet of Things, mobile communication and other technologies, people's requirements for wireless co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/08C07D333/54C09K19/34C09K19/44
CPCC07D209/08C07D333/54C09K19/3477C09K19/3491C09K19/44
Inventor 彭少磊王艳伟国新涛崔建海房凤梅孙云峰吕军史子谦丰佩川
Owner YANTAI XIANHUA CHEM TECH CO LTD
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