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Biphenyl-type magnetic liquid crystal monomer substituted by alkylimidazole tetrahalide ferric salt and preparation method thereof

A technology of alkyl imidazoles and liquid crystal monomers is applied in the field of ring-opening metathesis polymerization to synthesize a class of structures, which can solve problems such as unreported, and achieve good substrate universality, controllable structure and mild reaction conditions. Effect

Inactive Publication Date: 2020-06-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic combination of liquid crystal materials and magnetic materials has not been reported.

Method used

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  • Biphenyl-type magnetic liquid crystal monomer substituted by alkylimidazole tetrahalide ferric salt and preparation method thereof
  • Biphenyl-type magnetic liquid crystal monomer substituted by alkylimidazole tetrahalide ferric salt and preparation method thereof
  • Biphenyl-type magnetic liquid crystal monomer substituted by alkylimidazole tetrahalide ferric salt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The synthesis of intermediate product a, its chemical structure is as follows:

[0068]

[0069] (1) Add 1,4-dibromobutane (13.2190g, 60mmol) and anhydrous potassium carbonate into a 250mL round-bottomed flask, and stir with a polytetrafluoroethylene magnet. 5-norbornene-2,3-dicarboximide (1.6651 g, 10 mmol) was added into 100 mL DMF to form solution A, and solution A was added dropwise into 1,4-dibromobutane. After the addition was completed, the stirring reaction was continued for 48h to make the reaction complete.

[0070] (2) After the reaction, the resulting mixed system was filtered, the filtrate was transferred to a 500mL separatory funnel, 150mL distilled water was added, and then extracted three times with 50mL dichloromethane, the dichloromethane phases were combined, and anhydrous magnesium sulfate was added to dry overnight. The dried liquid was filtered, the filtrate was collected, and the solvent was removed on a rotary evaporator to obtain a crude pro...

Embodiment 2

[0073] The synthesis of intermediate product b, its chemical structure is shown below:

[0074]

[0075] (1) Add phenol (4.7023g, 25mmol) and potassium hydroxide (6.9803g, 50mmol) into a 250mL double-necked bottle, add a polytetrafluoroethylene magnet, then add 50mL of acetone to the bottle, and heat to 80°C, react for 30 minutes. Add 30 mL of acetone to intermediate product a (1.4909 g, 5 mmol) to form solution B, and drop solution B into the reaction flask. After the dropwise addition is completed, continue to stir and react at 80°C for 20h to make the reaction complete.

[0076] (2) After the reaction, the resulting mixture was transferred to a 500 mL separatory funnel, 100 mL of distilled water was added, and fully acidified with hydrochloric acid, then extracted three times with 50 mL of ethyl acetate, the ethyl acetate phase was combined, and anhydrous magnesium sulfate was added to dry overnight. The dried liquid was filtered, the filtrate was collected, and the so...

Embodiment 3

[0079] The synthesis of intermediate product c, its chemical structure is shown below:

[0080]

[0081] (1) Add intermediate product b (403.47mg, 1mmol), 1,10-dibromodecane (6.062g, 20mmol), potassium hydroxide (57mg, 1mmol) into a 100mL round bottom flask, and add polytetrafluoroethylene Vinyl fluoride magnet, then add 20mL acetone to the bottle, heat to 60°C, and react for 20h.

[0082](2) After the reaction, the resulting mixture was transferred to a 125 mL separatory funnel, 35 mL of distilled water was added, and extracted three times with 50 mL of ethyl acetate, the ethyl acetate phases were combined, and anhydrous magnesium sulfate was added to dry overnight. The dried liquid was filtered, the filtrate was collected, and the solvent was removed on a rotary evaporator to obtain a crude product.

[0083] (3) The crude product was separated by column chromatography, petroleum ether / ethyl acetate was used as eluent, the product was collected, the solvent was removed by...

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Abstract

The invention discloses an alkyl imidazole tetra-halogen ferric salt substituted biphenyl magnetic liquid crystal monomer and a preparation method thereof. 5-norbornene-2,3-dicarboximide is used as raw materials; biphenyl liquid crystal units and structural magnetic units are simultaneously integrated onto small molecules to prepare the monomer with the liquid crystal behavior and the magnetic behavior; the application range of the material is expanded; the potential application is realized in aspects of information storage material preparation, wave absorption material, magnetic imaging, electronic display and the like.

Description

technical field [0001] The present invention relates to a kind of polymerizable ionic liquid monomer containing biphenyl mesogen, polymer and its synthesis method, more specifically, to a kind of preparation method of small molecule magnetic ionic liquid containing biphenyl mesogen And a method for synthesizing a class of side-chain molecular-level magnetic liquid crystal polymers with controllable structure by ring-opening metathesis polymerization catalyzed by Grubbs third-generation reagents. Background technique [0002] Magnetic functional material is an ancient and widely used material. On this basis, magnetic polymer materials have greater application prospects because of their low density, easy processing and molding, easy control of shape and size, and good flexibility. Magnetic polymers can be classified into composite magnetic polymers and structural magnetic polymers according to their preparation methods. Composite magnetic polymer refers to the composite of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D403/12C09K19/34C09K19/38C08G61/12H01F1/42H01F1/44
CPCC07D403/12C08G61/12C08G61/124C08G2261/11C08G2261/143C08G2261/3241C08G2261/374C08G2261/418C08G2261/53C09K19/34C09K19/3483H01F1/42H01F1/44
Inventor 任丽霞于晓亮袁晓燕
Owner TIANJIN UNIV
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