Highly polarizing fluorescent film and preparation method thereof
A technology of polarized fluorescence and thin films, applied in chemical instruments and methods, luminescent materials, liquid crystal materials, etc., can solve difficult problems such as high polarization degree, and achieve the effect of high polarized fluorescence
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Embodiment 1
[0054] The preparation of smectic B-phase liquid crystal material, the synthesis route is:
[0055]
[0056] Concrete synthetic steps are as follows:
[0057] 1.1 Preparation of intermediate 4
[0058] Weigh 9.9g of ethyl p-hydroxybenzoate, add 80mL of DMF to dissolve it, add 10.0g of potassium carbonate, heat and stir for half an hour, then add 10.8g of 6-bromohexanol, control the reaction temperature at 90°C, reflux for 24h, and the reaction ends After cooling to room temperature, the system was poured into 600 mL of water for dilution, extracted with ether, dried, and rotary evaporated to obtain intermediate 4 (12.3 g), with a yield of 77%.
[0059] 1.2 Preparation of Intermediate 5
[0060] Weigh 12.1g of the intermediate 4 prepared in step (1), add 100mL THF to dissolve it, then add 4.8g NaOH aqueous solution 50mL, control the reaction temperature at 90°C, reflux for 24h, cool to room temperature after the reaction, and filter with suction. Add to dissolve, adjust t...
Embodiment 2
[0071] The synthesis of embodiment 2 fluorescent dichroic dyes
[0072] 2.1 The synthetic route is:
[0073]
[0074] 2.2 The specific synthesis steps are as follows:
[0075] a, the preparation of intermediate 1
[0076] Weigh 11.7g of 4,7-dibromo-2,1,3-benzothiadiazole and 15.2g of p-methoxyphenylboronic acid, dissolve in 210mL of 1,4-dioxane, protect under nitrogen environment, and weigh again Take 16.5g K 2 CO 3 Make a 2M aqueous solution and add it to the flask for stirring, then add 3.5g Pd(PPh 3 ) 4 , control the reaction temperature at 103-105°C, reflux reaction for 24h, cool to room temperature after the reaction, and obtain intermediate 1 (9.5g) after suction filtration and vacuum drying, with a yield of 68%;
[0077] b, the preparation of intermediate 2
[0078] Weigh 4.6g of the intermediate 1 obtained in step (1), add 100mL of hydrobromic acetic acid solution, then add 4.6g of tetra-n-butylammonium bromide, control the reaction temperature at 70°C, reflu...
Embodiment 3 2
[0083] The preparation of embodiment 3 dichroic mixtures
[0084] According to the ratio of liquid crystal material AHPPAH: fluorescent dichroic dye T: photoinitiator: inhibitor = 1:0.015:0.01:0.001, respectively weigh 1 mL of liquid crystal material dichloromethane solution with a concentration of 1 g / mL and a concentration of 1.5 mg / mL fluorescent dichroic dye dichloromethane solution 1mL, photoinitiator dichloromethane solution 1mL with a concentration of 1mg / mL, and photoinitiator dichloromethane solution with a concentration of 0.1mg / mL 1mL. All solutions were combined and the desired dichroic mixture was obtained after removal of the solvent.
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