Additive and application thereof
An additive and molecular technology, applied in the field of additives, can solve the problems such as the stability of the alignment ability of polar compounds needs to be improved, and it is difficult to have both the vertical alignment ability and the voltage retention rate.
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preparation example 1
[0233] [Preparation Example 1] Preparation of Additive Molecule Exp-A1
[0234]
[0235] The synthesis process of the additive molecule Exp-A1 is shown above. Compound 1 (30g, 91.3mmol), diisopropylamine (diisopropylamine, 1.3g, 12.8mmol), N-bromosuccinimide (N-bromosuccinimide (NBS), 33.3g, 187.2mmol), and dichloromethane ( dichloromethane, 400mL) was placed in a 1000mL reaction bottle, stirred and dissolved, and reacted at room temperature (20-30°C) for 6 hours. After the reaction was completed, water was added, extracted with dichloromethane and water, and the organic layer was collected. The solvent of the collected organic layer was removed by using a rotary concentrator, and then column chromatography was performed to obtain compound 2.
[0236] Add sodium hydride (sodium hydride, 4.2g, 173mmol), dimethylformamide (DMF, 200mL) and compound 2 (24.0g, 49.4mmol) into a 500mL double-neck round bottom flask, and stir for 30 minutes , at 0° C., iodoethane (iodoethane, 23...
preparation example 2
[0241] [Preparation Example 2] Preparation of Additive Molecule Exp-A2
[0242]
[0243]The synthesis process of the additive molecule Exp-A2 is shown above. Compound 4 (3.0g, 5.6mmol), methacrylic acid (methacrylic acid, 2.6g, 30.6mmol), 4-dimethylaminopyridine (0.68g, 5.6mmol) and tetrahydrofuran (100mL) were placed in a 250mL reaction flask and stirred Dissolve and add N,N'-dicyclohexylcarbodiimide (2.7 g, 13.3 mmol) to the reaction flask at 0°C, and react at room temperature (20-30°C) for 24 hours. After the reaction was completed, water was added, ethyl acetate and water were used to extract, and the organic layer was collected. The solvent of the collected organic layer was removed by using a rotary concentrator, and column chromatography was performed to obtain the additive molecule Exp-A2 (white solid).
[0244] The additive molecule Exp-A2 is analyzed by nuclear magnetic resonance spectroscopy, and the obtained spectral information is as follows: 1 H NMR (CDCl ...
preparation example 3
[0245] [Preparation Example 3] Preparation of Additive Molecule Exp-A3
[0246]
[0247] The synthesis process of the additive molecule Exp-A3 is shown above. Compound 4 (1.89 g, 3.5 mmol) and dimethylformamide (50 mL) were dissolved in a 250 mL reaction flask. Sodium hydride (0.4 g, 16 mmol) was added under ice cooling, and stirred at room temperature for 30 minutes. (3-bromopropoxy)-tert-butyldimethylsilane ((3-bromopropoxy)-tert-butyldimethylsilane, 4.0 g, 16 mmol) was added and reacted at room temperature for 2 hours. After the reaction was completed, it was extracted with ethyl acetate and water, dried over magnesium sulfate, and the organic layer was collected. The solvent of the collected organic layer was removed using a rotary concentrator, and column chromatography was performed to obtain compound 7 (transparent oil).
[0248] Compound 7 (2.79 g, 3.2 mmol) and tetrahydrofuran (50 mL) were dissolved in a 250 mL reaction flask and cooled to 0°C. Slowly add tetra...
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