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Polyionic liquid-type alkaline indicator suitable for non-polar solvents and its preparation

A polyionic liquid and non-polar solvent technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, to achieve good thermal stability, simple synthesis, and controllable reactions good sex effect

Inactive Publication Date: 2017-03-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the research on polyionic liquid basic indicators is still in the stage of continuous development, the polyionic liquid basic indicators specially suitable for non-polar solvents have not been reported so far.

Method used

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  • Polyionic liquid-type alkaline indicator suitable for non-polar solvents and its preparation
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  • Polyionic liquid-type alkaline indicator suitable for non-polar solvents and its preparation

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Embodiment 1

[0045] A polyionic liquid-type alkaline indicator suitable for non-polar solvents, the structural formula of which is shown in formula (3), wherein n is 18.

[0046] The preparation method of the above-mentioned polyionic liquid type alkaline indicator suitable for non-polar solvents is:

[0047] Step a: Carry out water and oxygen removal treatment on a 150 ml three-necked flask. The water and oxygen removal treatment is as follows: fully dry the clean 150 ml three-necked flask at 90 degrees Celsius for 3 hours, take it out and cool it to room temperature, and inject nitrogen gas ;

[0048] Step b: under nitrogen protection, add 29.60 g of phthalic anhydride and 50 ml of N,N-dimethylformamide into the three-necked flask, and stir to form a uniform solution;

[0049] Step c: Add 0.13 grams of ethylene glycol (the mole percentage of phthalic anhydride is 1% by mole) to the solution obtained in step b under nitrogen protection, and stir;

[0050] Step d: Add 18.50 g of epichloroh...

Embodiment 2

[0057] A polyionic liquid-type alkaline indicator suitable for non-polar solvents, the structural formula of which is shown in formula (3), wherein n is 21.

[0058] The preparation method of the above-mentioned polyionic liquid type alkaline indicator suitable for non-polar solvents is:

[0059] Step a: Carry out water and oxygen removal treatment on a 150 ml three-necked flask. The water and oxygen removal treatment is as follows: fully dry the clean 150 ml three-necked flask at 90 degrees Celsius for 3 hours, take it out and cool it to room temperature, and inject nitrogen gas ;

[0060] Step b: under nitrogen protection, add 27.00 g of phthalic anhydride and 50 ml of N,N-dimethylformamide into a three-necked flask, and stir to form a uniform solution;

[0061] Step c: Add 0.18 grams of ethylene glycol (accounting for 1.5% mole percent of phthalic anhydride) to the solution obtained in step b under nitrogen protection, and stir;

[0062] Step d: Add 16.88 g of epichlorohy...

Embodiment 3

[0069] A polyionic liquid type alkaline indicator suitable for non-polar solvents, its structural formula is shown in formula (3), wherein, n is 25.

[0070] The preparation method of the above-mentioned polyionic liquid type alkaline indicator suitable for non-polar solvents is:

[0071] Step a: Carry out water and oxygen removal treatment on a 150 ml three-necked flask. The water and oxygen removal treatment is as follows: fully dry the clean 150 ml three-necked flask at 90 degrees Celsius for 3 hours, take it out and cool it to room temperature, and inject nitrogen gas ;

[0072] Step b: under the protection of nitrogen, add 30.00 g of phthalic anhydride and 50 ml of N,N-dimethylformamide into the three-necked flask, and stir to form a uniform solution;

[0073] Step c: add 0.2 grams of ethylene glycol (accounting for 1.5% mole percent of phthalic anhydride) to the solution obtained in step b under nitrogen protection, and stir;

[0074] Step d: Add 18.75 g of epichlorohy...

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Abstract

The present invention provides a poly ionic liquid type alkaline indicator suitable for non-polar solvents, and a preparation method thereof. The preparation method is characterized by comprising: carrying out water and oxygen removing treatment on a reaction container; under nitrogen protection, adding o-phthalic anhydride and N,N-dimethylformamide to the reaction container; under nitrogen protection, adding ethylene glycol, and stirring; adding epichlorohydrin to the obtained solution, and carrying out a reaction under stirring; adding N-methylimidazole, and carrying out a reaction under stirring; adding the obtained mixture to acetone, stirring, and precipitating; dissolving the precipitate in deionized water, adding to a methyl blue aqueous solution in a dropwise manner, carrying out a reaction under stirring, and precipitating; repeatedly rinsing the obtained precipitate with deionized water, carrying out vacuum drying, adding to methylene chloride, and stirring to form a mixture; and filtering to obtain a filtrate, and carrying out vacuum drying to obtain the poly ionic liquid type alkaline indicator suitable for non-polar solvents. The polymer of the present invention can be used in the alkaline indication field of the non-polar solvents.

Description

technical field [0001] The invention relates to an alkaline indicator in the technical field of chemical industry, in particular to a preparation method of a polyionic liquid indicator with an alkaline indicating function in a non-polar solvent. Background technique [0002] An ionic liquid is an ionic compound that is liquid at or near room temperature. Since ionic liquids were first reported 100 years ago, the application of ionic liquids has covered many fields, such as fine chemical industry, separation and purification, electrochemistry, solar cells, biomedicine and so on. In recent years, polyionic liquids developed from ionic liquids have attracted great attention in the fields of polymer chemistry and materials science. Polyionic liquids are polymers with anionic and cationic electrolyte groups on repeating units. Polyionic liquid has the excellent characteristics of ionic liquid, such as low melting point, low vapor pressure, good conductivity, good stability, rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/91C08G63/682G01N21/80
Inventor 夏于旻罗斌赵华蕾沈佳豪王燕萍
Owner DONGHUA UNIV