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Photoisomeric chiral molecule and application thereof in realizing patterning of color liquid crystal film

A technology of photoisomerization and chiral molecules, used in liquid crystal materials, preparation of organic compounds, organic chemistry, etc.

Pending Publication Date: 2022-06-03
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to overcome the problem that the presentation form of the liquid crystal mixture in the prior art is only a small liquid crystal cell

Method used

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  • Photoisomeric chiral molecule and application thereof in realizing patterning of color liquid crystal film
  • Photoisomeric chiral molecule and application thereof in realizing patterning of color liquid crystal film
  • Photoisomeric chiral molecule and application thereof in realizing patterning of color liquid crystal film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A photoisomeric chiral molecule and its application in realizing the patterning of a color liquid crystal film, specifically comprising the following steps:

[0040] The structures of the liquid crystal monomer, chiral dopant and photoinitiator are as follows:

[0041] (1) Liquid crystal monomer 1

[0042]

[0043] (2) Chiral dopant 1

[0044]

[0045] (3) Photoinitiator 1

[0046]

[0047] Step1: Synthesis of 4-methoxycinnamic acid isosorbide of chiral dopant 1

[0048]After weighing 4-methoxycinnamic acid (20g, 112mmol) and isosorbide (7.81g, 53.4mmol) in a 1000mL three-necked flask, then 1-ethyl-(3-dimethylaminopropyl) carbon Diimide (EDC) (19.91 g, 128.2 mmol) and 4-dimethylaminopyridine (DMAP) (1.31 g, 10.7 mmol) were dissolved in 200 mL of tetrahydrofuran and added to the flask under N 2 The mixture was stirred at room temperature for 20 h. After the reaction, the liquid was first poured into ethyl acetate, then washed twice with deionized water, onc...

Embodiment 2

[0056] A photoisomeric chiral molecule and its application in realizing the patterning of a color liquid crystal film, specifically comprising the following steps:

[0057] The structures of the liquid crystal monomer, chiral dopant and photoinitiator are as follows:

[0058] (1) Liquid crystal monomer 1

[0059]

[0060] (2) Chiral dopant 2

[0061]

[0062] (3) Photoinitiator 2

[0063]

[0064] Step1: Synthesis of Chiral Dopant 2

[0065] After weighing 4-ethoxycinnamic acid (20g, 112mmol) and binaphthol (7.81g, 53.4mmol) in a 1000mL three-necked flask, then 1-ethyl-(3-dimethylaminopropyl) Carbimide (EDC) (19.91 g, 128.2 mmol) and 4-dimethylaminopyridine (DMAP) (1.31 g, 10.7 mmol) were dissolved in 300 mL of tetrahydrofuran and added to the flask under N 2 The mixture was stirred at room temperature for 20 h. After the reaction, the liquid was first poured into ethyl acetate, then washed twice with deionized water, once with 1 mol / L dilute hydrochloric acid, a...

Embodiment 3

[0071] A photoisomeric chiral molecule and its application in realizing the patterning of a color liquid crystal film, specifically comprising the following steps:

[0072] The structures of the liquid crystal monomer, chiral dopant and photoinitiator are as follows:

[0073] (1) Liquid crystal monomer 2

[0074]

[0075] (2) Chiral dopant 1

[0076]

[0077] (3) Photoinitiator 1

[0078]

[0079] Step1: Synthesis of chiral dopant 1 is the same as Example 1

[0080] Step2: Preparation of Liquid Crystal Mixture 3

[0081] Weigh liquid crystal monomer 2 (1 g), chiral dopant 1 (0.062 g) and photoinitiator 1 (0.06 g) into a glass bottle, and add solvent (cyclohexanone 3.59 g and ethyl acetate 0.90 g), Heated at 50°C for 4 min, and mixed well.

[0082] Step3: Preparation of photoisomeric liquid crystal film

[0083] Select a piece of PET film, coat the liquid crystal mixture 3 on the surface of the PET film, scrape with a wire rod, then dry the solvent, and select an...

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Abstract

The invention relates to a photoisomeric chiral molecule and application thereof in realizing patterning of a color liquid crystal film, and relates to the technical field of liquid crystal films. The preparation method of the photoisomeric liquid crystal film comprises the following steps: heating a liquid crystal monomer and a chiral dopant in a solvent under the action of a photoinitiator to react completely, coating the surface of the film with the reaction product, drying the film, and illuminating the film to obtain the photoisomeric liquid crystal film, the chiral dopant is a photoisomerization chiral molecule. The preparation method of the photoisomerization liquid crystal film is simple, convenient to operate and low in raw material consumption, and the prepared photoisomerization liquid crystal film is stable in performance.

Description

technical field [0001] The invention relates to the technical field of liquid crystal films, in particular to a photoisomerized chiral molecule and its application in realizing the patterning of color liquid crystal films. Background technique [0002] With the development of photoisomeric chiral molecules, researchers applied these molecules to the preparation of liquid crystal materials. Among them, cholesteric liquid crystals can selectively reflect light of different wavelengths due to their own helical structure. The corresponding wavelength of light is determined by the pitch of the helical structure. [0003] So far, the technology of cholesteric liquid crystals formed by different methods is relatively mature. Such liquid crystals can be liquid crystal molecules with chirality themselves, or they can be formed by inducing liquid crystal molecules through a small amount of chiral molecules (ie, chiral dopants). The supramolecular helical structure of the cholesteric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D493/04C07C69/734C07C67/08C09K19/58
CPCC07D493/04C07C69/734C09K19/586C09K19/588C07B2200/07
Inventor 杨永刚俞润炜李艺李宝宗
Owner SUZHOU UNIV
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