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Benzoxazole linked triphenylimidazole polymer as well as preparation method and application thereof

A technology of triphenylimidazole and benzoxazole, which is applied in the field of polymer and its preparation, and the polymer of benzoxazole linked with triphenylimidazole and its preparation, which can solve the problems of small specific surface area and weak adsorption capacity

Active Publication Date: 2019-07-09
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of small specific surface area and weak adsorption capacity in the solid adsorbent used for adsorbing gas in the prior art, the present invention proposes a solid adsorbent that is easy to prepare, low cost and has good adsorption effect. By enlarging the specific surface area of ​​the polymer To enhance the gas adsorption capacity

Method used

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  • Benzoxazole linked triphenylimidazole polymer as well as preparation method and application thereof
  • Benzoxazole linked triphenylimidazole polymer as well as preparation method and application thereof
  • Benzoxazole linked triphenylimidazole polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A kind of method for preparing the polymer of benzoxazole linking triphenylimidazole:

[0076] (1) Preparation of catalyst:

[0077] SiO 2 Place in a muffle furnace and activate at 200°C for 2h, then take 10g of activated SiO 2 Put in 100ml 10% NaHSO 4 Soak in water for 24 hours, suction filter, and dry to obtain the silica catalyst loaded with sodium bisulfate;

[0078] (2) Preparation of 4-(1,3-dithiolanyl)benzaldehyde (2):

[0079] Dissolve 1g of terephthalaldehyde (1) in 10ml of dichloromethane, add 0.2g of the catalyst prepared in step (1), then slowly drop in 0.35g of ethanedithiol while stirring, at room temperature The reaction was stirred, and after the reaction was completed, the product 4-(1,3-dithiolanyl)benzaldehyde was separated by column chromatography (petroleum ether / ethyl acetate (10:1));

[0080] (3) Preparation of 1,2-bis(4-(1,3-dithiolanyl)phenyl)-2-hydroxyethanone (3):

[0081] Dissolve 2g of 4-(1,3-dithiolanyl)benzaldehyde in 10ml of 95% eth...

Embodiment 2

[0091] Repeat Example 1, but after the obtained benzoxazole-linked triphenylimidazole polymer is washed successively with acetone, water, 1M HCl, 1M NaOH, then in acetone:dichloromethane solution with a volume ratio of 1:1 After soaking in medium for 24 hours and suction filtration, vacuum drying at 120° C. for 24 hours yielded 490 mg (87%) of the final polymer.

Embodiment 3

[0093] A kind of method for preparing the polymer of benzoxazole linking triphenylimidazole:

[0094] (1) Preparation of catalyst:

[0095] Take 100g SiO 2 Place in a muffle furnace and activate at 200°C for 2h, then place the activated SiO 2 Pour 10% NaHSO 4 Soak in the solution for 24h to ensure that NaHSO 4 Adsorbed on SiO 2 Finally, filter through a Buchner funnel, transfer to a 60°C drying oven, and dry to obtain a silica catalyst loaded with sodium bisulfate;

[0096] (2) Preparation of 4-(1,3-dithiolanyl)benzaldehyde (2):

[0097] Add 1g (7.5mmol) of terephthalaldehyde, 10ml of anhydrous dichloromethane, 0.2g of silica catalyst loaded with sodium bisulfate into a 25ml round bottom flask, then slowly drop in 0.7g (7.5mmol) while stirring 1,2-ethanedithiol, the reaction was stirred at room temperature, followed by TLC until the reaction was completed. After the reaction was completed, 1.2 g of the product 4-(1,3-dithiolanyl)benzaldehyde was obtained by column chrom...

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Abstract

The invention provides a benzoxazole linked triphenylimidazole polymer. The polymer is prepared by the following preparation steps: firstly, performing thioacetal protection on terephthalaldehyde, performing a benzoin condensation reaction, performing oxidation to obtain 4,4-di(1,3-dithiolane)bibenzoyl, performing imidazole ring formation, and performing deprotection to obtain 2,4,5-tris(4-formylphenyl)-1H-imidazole; and performing a reaction on the 2,4,5-tris(4-formylphenyl)-1H-imidazole and 1,7-diamine-6H,12H-5,11-dimethylbenzo[1,5]diaza-1,8-diol to obtain the benzoxazole linked triphenylimidazole polymer. The polymer provided by the invention is a solid adsorbent which is easy to prepare, and has low costs and a good adsorption effect, and the gas adsorption capacity is enhanced by enlargement of the specific surface area of the polymer.

Description

technical field [0001] The invention relates to a polymer and a preparation method thereof, in particular to a benzoxazole-linked triphenylimidazole polymer used for gas adsorption, a preparation method and application thereof, and belongs to the field of gas adsorbents. Background technique [0002] In recent years, the global climate change caused by the greenhouse effect has gradually become an environmental issue that has attracted much attention. As the largest "contributor" to the greenhouse effect, the content of carbon dioxide in the atmosphere is increasing day by day, and it is continuously exacerbating the deterioration of the global climate and ecology. . Carbon dioxide emissions are mainly caused by the burning of fossil fuels, so simply reducing carbon dioxide emissions will inevitably have an impact on industrial development and social economy. Although countries have committed themselves to the development of green energy and new energy, they have not yet re...

Claims

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Application Information

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IPC IPC(8): C08G73/22C08G73/18B01D53/02B01J20/26B01J20/30
CPCB01D53/02B01D2257/504B01J20/262C08G73/18C08G73/22Y02P20/151Y02C20/40
Inventor 陈红飙陈能洪刘益江阳梅黎华明
Owner XIANGTAN UNIV
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