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Light controllable orientated liquid crystal polymer containing photosensitive group of cinnyl and its synthesis method

A cinnamoyl photosensitive and liquid crystal polymer technology, which is applied in liquid crystal materials, chemical instruments and methods, etc., can solve problems such as poor thermal stability, and achieve strong adhesion, good processing performance, and good orientation effects

Inactive Publication Date: 2006-05-17
NANKAI UNIV
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  • Application Information

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Problems solved by technology

Since the cinnamoyl group undergoes a [2+2] electrocyclization reaction parallel to the direction of the polarized light field, they have excellent photo-orientation properties, but such polymers have poor thermal stability

Method used

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  • Light controllable orientated liquid crystal polymer containing photosensitive group of cinnyl and its synthesis method
  • Light controllable orientated liquid crystal polymer containing photosensitive group of cinnyl and its synthesis method
  • Light controllable orientated liquid crystal polymer containing photosensitive group of cinnyl and its synthesis method

Examples

Experimental program
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Effect test

Embodiment

[0027] Preparation of 3-Hydroxymethyl-3-methyloxytetracycline (Compound 1)

[0028] Add 12g of 2,2-dimethylol-1-propanol, 11.8g of diethyl carbonate, 0.1g of potassium hydroxide and 1ml of ethanol into a 100ml three-necked flask, raise the temperature of the oil bath to 110°C under nitrogen protection, and keep the temperature constant for 20 minutes. Ethanol was distilled off at atmospheric pressure. Distilled under reduced pressure, collected 80°C / 40mmHg fraction, 4g of colorless transparent liquid, yield 63%. References [E.J.Corey and N.Raju, Tetrahedron Lett., 24(50), 5571(1983).]

[0029] Preparation of 3-methyl-3-((bromohexyloxy)methyl)oxytetracycline (Compound 2)

[0030] 5.6g of sodium hydroxide and 0.2g of tetramethylammonium bromide were dissolved in 70ml of water, 18g of 1,6-dibromohexane, and 3.1g of 3-hydroxymethyl-3-methyloxytetracycline were dissolved in 28ml of n-hexane , put the above two solutions into a 250ml three-neck flask, stir at room temperature for...

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Abstract

The invention relates to a light-controlled alignment liquid crystal polymer containing a cinnamoyl photosensitive group and a synthesis method thereof. The structural formula is: ∴ in the formula, m and n are integers of 1-30. The invention has good processability, good film-forming properties, high transparency, strong corrosion resistance, and good adhesion, which has great advantages in the production of high-resolution multi-domain liquid crystal orientation, and enables the production of devices Simpler and more convenient. The synthesis method of the invention has simple routes, easy access to raw materials, can reduce the cost of final products, and has important practical significance and economic value for obtaining light-controlled alignment liquid crystal polymers with real application value.

Description

Technical field: [0001] The invention relates to the synthesis of light-controlled alignment liquid crystal polymers, in particular to a light-controlled alignment liquid crystal polymer containing cinnamoyl photosensitive groups and a synthesis method thereof. Background technique: [0002] As an anisotropic optoelectronic material, liquid crystal has been widely used in display and information processing systems. With the development of large-capacity and high-definition large-screen liquid crystal displays, the orientation technology of liquid crystals has become the key point of liquid crystal display technology. At present, the conventional orientation method of liquid crystal molecules is to rub the substrate coated with an orientation film. This method is simple and convenient. However, it is difficult to avoid mechanical scratches, pollution or static electricity during the rubbing process, which affects the orientation of liquid crystal molecules. The uniformity of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/38
Inventor 张保龙吴利平石可瑜朱军何尚锦郭先芝杜宗杰
Owner NANKAI UNIV