Acid/base double stimulation responsive nanometer container and preparation method thereof
A stimuli-responsive, nano-container technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of large volume of adamantane group and complex structure of viologen, and achieve small size, The effect of convenient preparation and simple structure
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[0037] References for the preparation method of mesoporous silica nanospheres of the present invention [C D Ding; Y Liu; M DWang; T Wang; J J Fu; Superhydrophobic Coating Based on Mechanized Silica Nanoparticles for Reliable Protection of Magnesium Alloy[J].J. Am.Chem.Soc.,2016,4(21):8041-8052], the specific steps are as follows:
[0038] With 0.5g cetyltrimethylammonium bromide (CTAB), 1.75mL 2mol / L sodium hydroxide solution, 240mLH 2 O was added to a 500mL three-necked flask, heated to 80°C under vigorous stirring, and kept for 30 minutes to activate CTAB, and then 2.5mL tetraethyl orthosilicate (TEOS) was added dropwise. Under vigorous stirring, white precipitates gradually appeared in the reaction vessel. generate. React at 80°C for 2 hours, filter while hot, wash the solid with water and methanol several times, and dry it in vacuum. After drying, ultrasonically disperse the solid in a mixture of 100mL methanol and 5mL concentrated hydrochloric acid, stir the reaction so...
Embodiment 1
[0040] 1. Preparation of guest molecules
[0041] Weigh 0.6g of sodium hydroxide, measure 0.97mL of 6-chloro-1-n-hexanol and 5mL of water, and mix them in an ice bath. Weigh 1.5g of p-toluenesulfonyl chloride and dissolve it in 5mL of tetrahydrofuran, add it to the above mixed solution, and control the dropping time to 30min. After reacting for 2 h, it was extracted twice with dichloromethane, the collected organic phase was washed with water, and dried over anhydrous sodium sulfate. The solvent was removed by rotary evaporation, and dried under vacuum at 40°C. 1.5 g of yellow liquid was obtained as the product 6-p-toluenesulfonyl-1-chlorohexane.
[0042] The above product 6-p-toluenesulfonyl-1-chlorohexane (21.78mg 0.075mmol) 1-methylimidazole (4.1mg0.05mmol) was dissolved in 15mL toluene, and reacted at 90°C for 30h. After the reaction had cooled to room temperature, the product was washed with ethyl acetate (4×20 mL) and dried in vacuo. The white waxy product 1-methyl-3...
Embodiment 2
[0056] 1. Preparation of guest molecules
[0057] Weigh 1.2g of sodium hydroxide, measure 3.94mL of 6-chloro-1-n-hexanol and 10mL of water, and mix them in an ice bath. Weigh 3g of p-toluenesulfonyl chloride and dissolve it in 10mL of tetrahydrofuran, add it into the above mixed solution, and control the dropping time to 60min. After reacting for 2 hours, it was extracted twice with dichloromethane, and the collected organic phase was washed with water and dried over anhydrous sodium sulfate. The solvent was removed by rotary evaporation, and dried under vacuum at 40°C. 2.9 g of yellow liquid was obtained as the product 6-p-toluenesulfonyl-1-chlorohexane.
[0058] The above product 6-p-toluenesulfonyl-1-chlorohexane (43.56mg 0.15mmol) 1-methylimidazole (8.2mg0.1mmol) was dissolved in 20mL toluene, and reacted at 90°C for 36h. After the reaction had cooled to room temperature, the product was washed with ethyl acetate (4×40 mL) and dried in vacuo. The white waxy product 1-m...
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