Polymerizable compound and its preparation method and application
A technology of polymerizing compounds and compounds, applied in chemical instruments and methods, organic chemistry, liquid crystal materials, etc., can solve problems such as voltage reduction
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Embodiment 1
[0124] The synthetic route of compound I-1-2 is as follows:
[0125]
[0126] Its specific preparation process is as follows:
[0127] 1) Synthesis of Compound C
[0128] In a 1000mL three-necked flask, add 13.8g compound A, 19g compound B, 300mL toluene, 150mL ethanol, 150mL water, 42.4g anhydrous sodium carbonate, under nitrogen protection, add 0.5g Pd (PPh 3 ) 4 , heated to reflux for 8h, post-treatment, purified by column chromatography to obtain 10.8g of brown solid compound C, GC>97%, yield: 51%.
[0129] 2) Synthesis of compound I-1-2
[0130] In a 500mL three-necked flask, add 10.8g compound C, 200mL toluene, 10.6g methacryloyl chloride, control the temperature to 0°C, add 15.2g triethylamine dropwise, after dropping, stir at room temperature for 6h, post-treatment, and purify by column chromatography 6.2 g of white solid compound I-1-2 was obtained, GC>99%, yield: 44.6%.
[0131] MS m / z: 278 (79%) 209 (8%) 181 (13%) 152 (25%) 69 (100%).
[0132] Referring to ...
Embodiment 2
[0143] Compounds I-1-2, II-1-5, I-3-7 and II-3-7 obtained by the synthesis method in the above examples were mixed with the nematic liquid crystal medium M according to the weight ratio of 0.2%: 99.8%, The mixtures M1, M2, M3 and M4 were obtained, and the obtained mixtures were poured into a 4um VA test cell (the pretilt angle was tested by the crystal rotation method, and recorded as the initial pretilt angle), and at a voltage of 24v, 50mW / cm was used 2 After irradiating UV light for 120s, remove the voltage, continue to use UV light for 60min, and then test the pretilt angle by the crystal rotation method, which is recorded as the UV pretilt angle. The test cell after testing the pretilt angle is driven by a voltage of 12V at 60°C. , and lasted for 48h, and then test the pre-tilt angle at room temperature, which is recorded as the RA pre-tilt angle. The test data is shown in the following table:
[0144] Table 2 Test Properties of Mixtures
[0145] liquid crystal...
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