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Triazinyl polyionic liquid as well as synthesis method and application thereof

A polyionic liquid, triazine-based polymerization technology, applied in chemical instruments and methods, educts, catalytic reactions, etc., can solve problems affecting industrial applications, metal residues, increase energy consumption, etc., and achieve high selectivity and conversion. efficiency, easy separation, mild reaction conditions

Active Publication Date: 2021-11-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the inventor's research, a lot of porous materials have been developed to be used as catalysts for the cycloaddition reaction of carbon dioxide and epoxy compounds, but most catalysts contain metal ions, which will cause metal residues in the product and affect its industry. application
However, metal-free catalysts can only efficiently synthesize cyclic carbonates under harsh reaction conditions of high temperature and high pressure, which increases energy consumption.

Method used

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  • Triazinyl polyionic liquid as well as synthesis method and application thereof
  • Triazinyl polyionic liquid as well as synthesis method and application thereof
  • Triazinyl polyionic liquid as well as synthesis method and application thereof

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Embodiment approach

[0029] A typical embodiment of the present invention provides a triazine-based polyionic liquid having the following repeating units:

[0030]

[0031] between the above repeating units connect.

[0032] Another embodiment of the present invention provides a method for preparing the above-mentioned triazine-based polyionic liquid, which is obtained by performing a quaternization reaction between a trimidazolylbenzene monomer and a triazine-containing tribenzyl bromide monomer;

[0033] Wherein, the trimidazolylbenzene monomer is 1,3,5-triimidazolylbenzene; the triazine-containing tribenzyl bromide monomer is 2,4,6-tri(4-bromomethylphenyl )-1,3,5-triazine.

[0034] The structural formula of 1,3,5-triimidazolylbenzene is

[0035] The structural formula of 2,4,6-tris(4-bromomethylphenyl)-1,3,5-triazine is

[0036] In some embodiments, under an inert atmosphere, the triimidazolylbenzene monomer and the triazine-containing tribenzyl bromide monomer are added into a solv...

Embodiment 1

[0054] Add 1,3,5-triimidazolylbenzene (0.1382g, 0.50mmol) and 2,4,6-tris(4-bromomethylphenyl)-1,3,5-triazine to a 25mL Schlenck reaction tube (0.2947g, 0.50mmol), add 10mL of N,N-dimethylformamide solvent, vacuumize, pass into N 2 , Heating and stirring at 80°C for 24h. After the reaction, the solid product was alternately washed three times with N,N-dimethylformamide and methanol solvent, and then the synthesized product was vacuum-dried at 60°C for 12 hours to obtain a light yellow powder, which was a triazine-based polyion Liquid, recorded as triazine-PIL.

[0055] The structural characterization results of the prepared triazine-based polyionic liquid are as follows: Figure 1-8 as shown,

[0056] figure 1 It is an infrared absorption spectrogram, which shows that the polyionic liquid containing a triazine ring has been successfully prepared. Among them, 1197cm -1 and 1188cm -1 The absorption peak at is the stretching vibration peak of the C-N bond on the imidazole r...

Embodiment 2

[0066] Put a suitable magnet in a clean 25mL autoclave, then put 6mmol of epoxy compound and 68mg of triazine-based polyionic liquid in a 25mL autoclave and mix evenly, and introduce carbon dioxide to replace Air in it, and then carbon dioxide gas was introduced into the reactor until the pressure of the reaction system in the reactor was 1 MPa, and the temperature of the reactor was maintained at 80° C., and the addition reaction was carried out for 12 hours. After the reaction kettle is cooled to room temperature, release the remaining carbon dioxide in the kettle, then add a certain amount of n-butanol as an internal standard, and a certain amount of N,N-dimethylformamide as a solvent to dilute, mix well and filter to obtain Part of the filtrate was analyzed by gas chromatography-mass spectrometry to obtain the product cyclochloropropenyl carbonate, the yield of cyclochloropropenyl carbonate was 99.0%, and the selectivity was 99%.

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Abstract

The invention discloses a triazinyl polyionic liquid and a synthesis method and application thereof. The triazinyl polyionic liquid has a repetitive unit, and the triazinyl polyionic liquid provided by the invention can be used as a metal-free heterogeneous catalyst to realize chemical conversion of carbon dioxide and an epoxy compound under relatively mild conditions.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly catalysis, and relates to a triazine-based polyionic liquid and its synthesis method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The whole world emits a large amount of carbon dioxide into the atmosphere every year, which seriously damages the carbon cycle balance in nature, and causes the greenhouse effect and the destruction of the ecological environment. At the same time, as a cheap and easy-to-obtain C1 resource, carbon dioxide can be used to prepare value-added chemical products, which can not only alleviate the huge damage caused by carbon dioxide to the ...

Claims

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Application Information

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IPC IPC(8): C08G73/06B01J31/06C07D317/38C07D317/64
CPCC08G73/0638C08G73/065B01J31/06B01J31/0284C07D317/38C07D317/64B01J2231/34Y02P20/54
Inventor 邓伟侨刘乘乘方旭
Owner SHANDONG UNIV
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