Preparation and application of asymmetric polyphenylene acetylene oligomers with ion transmembrane transport activity
A polyphenylene acetylene, asymmetric technology, applied in the field of artificial bionics, can solve the problems of limited application and low transmembrane activity
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Embodiment 1
[0059] (1) Weigh 10g of hydroquinone (90mmol) and 13.8g of potassium carbonate (99mmol) into a 250mL round bottom flask, measure about 100mL of anhydrous N,N-dimethylformamide into the reaction system, and heat to 90°C, after 30 minutes of reaction, a small amount of potassium iodide was added to accelerate the reaction process. Dissolve 16mL (90mmol) bromooctane in 20mL of anhydrous N,N-dimethylformamide and slowly add it dropwise to the reaction flask, and monitor by spotting. After the reaction was completed, the pH of the reaction system was adjusted to neutral, extracted twice with dichloromethane, the organic layer was dried over anhydrous sodium sulfate, the solvent was removed by suction filtration, and purified by column chromatography (petroleum ether: ethyl acetate = 4:1 , v / v), 18 g of yellow solid 1 was obtained, yield 90%. 1 H NMR (CDCl 3 ,400MHz): δ=6.85–6.69(m,4H),3.89(t,J=6.6Hz,2H),1.81–1.67(m,2H),1.49–1.39(m,2H),1.37– 1.24(m ,9H),0.88(t,J=6.9Hz,3H); 13 C ...
Embodiment 2
[0083] Step (1)-(10) embodiment 1 is identical, and step (11) is as follows:
[0084] (11) Synthesis of stereoregular oligomer P2:
[0085] Under anhydrous and oxygen-free conditions, take a 50mL drying tube and add compound 11 (0.06g, 0.076mmol), cuprous iodide (0.0017g, 0.0076mmol), tetrakistriphenylphosphine palladium (0.0106g, 0.0076mmol) in sequence, and pump Under argon atmosphere after vacuum, toluene (2.5 mL), triethylamine (2.5 mL) and tetrahydrofuran (2.5 mL) were injected by syringe. Freeze to remove oxygen, react at room temperature for 24 hours, the solution gradually turns bright yellow, and the upper layer shows strong green fluorescence, heat up to 60°C and react for about 72 hours; after the reaction is completed, pour into saturated sodium chloride aqueous solution to quench the reaction, two It was extracted twice with methyl chloride, dried over anhydrous magnesium sulfate, and the solvent was removed by suction filtration. The resulting bright yellow sol...
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