Polyacetylene containing benzophenanthrene disk-like mesogens on side chain and preparation method thereof
A discotic liquid crystal and triphenylene technology, applied in the field of polymer compounds and their preparation, can solve the problems of poor film-forming performance, low thermal stability, low molecular weight of polyacetylene, etc., and achieve good film-forming performance and molecular rigidity Increased, good solubility effects
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Embodiment 1
[0040] What this embodiment prepares is the polyacetylene of general formula I, wherein R is the linear alkyl group that carbon number is 4, and m is 8. Its reaction equation is as follows:
[0041]
[0042] First add 0.66 mmol of 2-hydroxyl-3,6,7,10,11-penta-butoxytriphenylene (1) (400 mg), 2 mmol of potassium carbonate (276 mg) to 15 ml of dry N, N-dimethylformamide until dissolved, then add 1 mmole of 8-chloro-n-octanol (165 mg) and stir to mix and under the protection of argon, heat up to 80 ° C for 24 hours; naturally cool after the reaction to room temperature, then the reaction solution was poured into 20 ml of water, and the solid crude product was separated out, filtered, extracted with dichloromethane successively, washed three times with water, dried, concentrated, separated and purified by column chromatography (mobile phase: dichloromethane: ethyl acetate volume ratio=50:1), and finally recrystallized with petroleum ether to obtain 326 mg of white solid 2-(8-h...
Embodiment 2
[0054]What this embodiment prepares is the polyacetylene of general formula I, wherein R is the straight-chain alkyl group with 6 carbon atoms, and m is 8. Its reaction equation is as follows:
[0055]
[0056] First, 0.54 mmol of 2-hydroxy-3,6,7,10,11-penta-n-hexyloxytriphenylene (1) (400 mg), 2 mmol of cesium carbonate (651.6 mg) were added to 15 ml of dry N , to dissolve in N-dimethylacetamide, then add 0.8 mmoles of 8-chlorooctanol (150 mg) and stir to mix and under argon protection, heat up to 88°C for 20 hours of reaction; naturally cool to At room temperature, the reaction solution was poured into 20 ml of water, and the solid crude product was separated out, filtered, extracted with chloroform successively, washed with water three times, dried, concentrated, separated and purified by column chromatography (mobile phase: dichloromethane: ethyl acetate) volume ratio=50:1), and finally recrystallized with petroleum ether to obtain white solid 2-(8-hydroxyoctyloxy)-3,6...
Embodiment 3
[0068] What this embodiment prepares is the polyacetylene of general formula I, wherein R is the straight-chain alkyl group with 8 carbon atoms, and m is 8. Its reaction equation is as follows:
[0069]
[0070] First add 0.51 mmol of 2-hydroxy-3,6,7,10,11-penta-n-octyloxytriphenylene (1) (450 mg), 2 mmol of potassium carbonate (276 mg) to 15 ml of dry Dissolve in ethanol, then add 1 mmol of 8-bromooctanol (208 mg) and stir to mix and under argon protection, heat up to 100°C for 30 hours of reaction; naturally cool to room temperature after the reaction, then pour the reaction solution into 20 milliliters of water, the solid crude product was precipitated, filtered, extracted with ethyl acetate successively, washed three times with water, dried, concentrated, separated and purified by column chromatography (mobile phase: dichloromethane: volume ratio of ethyl acetate=50:1) , and finally recrystallized with petroleum ether to obtain 230 mg of white solid 2-(8-hydroxyoctylox...
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Abstract
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