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A nitrogen heterocyclic carbene/co 2 Adduct functional organic porous polymer, preparation method and application

A porous polymer, nitrogen heterocyclic carbene technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problem of easy deactivation, unstable solid base, The problem of unsatisfactory catalyst recovery and reuse effect, to achieve the effect of simple operation, rich adduct active sites, and high specific surface area

Active Publication Date: 2021-07-30
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most catalytic systems require high temperature and high pressure to complete CO 2 Conversion, due to the characteristics of unstable solid base in the air and easy deactivation, the effect of catalyst recovery and reuse is not ideal

Method used

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  • A nitrogen heterocyclic carbene/co <sub>2</sub> Adduct functional organic porous polymer, preparation method and application
  • A nitrogen heterocyclic carbene/co <sub>2</sub> Adduct functional organic porous polymer, preparation method and application
  • A nitrogen heterocyclic carbene/co <sub>2</sub> Adduct functional organic porous polymer, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]1), preparation of organic porous polymer PEM1 containing imidazole functional group

[0035] The preparation route is:

[0036]

[0037] Dissolve N-vinylimidazole (0.94g, 10mmol), ethylene glycol dimethacrylate (2.0g, 10mmol) and azobisisobutyronitrile (AIBN, 0.08g) in 5mL toluene, and stir at room temperature for 2h Transfer to a 25mL polytetrafluoroethylene-lined stainless steel autoclave, put it in an oven at 90°C for solvothermal polymerization for 24 hours, after cooling to room temperature, evaporate the solvent at room temperature, and use ethanol and deionized Washed twice with water and dried in an oven at 100°C for 24 hours to obtain the organic porous polymer PEM1 containing imidazole functional groups.

[0038] 2), azacyclic carbene / CO 2 Preparation of Adduct Functionalized Organic Porous Polymer PEMC1

[0039] The preparation route is:

[0040]

[0041] Take 1g of the above-mentioned polymer PEM1 and disperse it in 5g of dimethyl carbonate, stir a...

Embodiment 2

[0047] 1), preparation of organic porous polymer PEM2 containing imidazole functional group

[0048] N-vinylimidazole (0.94g, 10mmol), ethylene glycol dimethacrylate (4.0g, 20mmol) and 2,2'-azobis(2-methylpropylamidine) dihydrochloride ( 0.4g) was dissolved in 10mL tetrahydrofuran, stirred at room temperature for 3h, then transferred to a 25mL polytetrafluoroethylene-lined stainless steel autoclave, and placed in a 100°C oven for solvothermal polymerization for 36h. After cooling to room temperature, the solvent was evaporated at room temperature. The obtained white monolith was mechanically crushed, washed three times with ethanol and deionized water, and dried in an oven at 80° C. for 30 h to obtain an organic porous polymer PEM2 containing imidazole functional groups.

[0049] 2), azacyclic carbene / CO 2 Preparation of Adduct Functionalized Organic Porous Polymer PEMC2

[0050] Take 1g of the above-mentioned polymer PEM2 and disperse it in 10g of dimethyl carbonate, stir a...

Embodiment 3

[0052] 1), preparation of organic porous polymer PEM3 containing imidazole functional group

[0053] Dissolve N-vinylimidazole (0.94g, 10mmol), ethylene glycol dimethacrylate (6.0g, 30mmol) and benzoyl peroxide (0.5g) in 10mL of benzene, stir at room temperature for 3h and transfer to 25mL In a stainless steel autoclave lined with polytetrafluoroethylene, put it in an oven at 110°C for solvothermal polymerization for 12 hours. After cooling to room temperature, evaporate the solvent at room temperature. The obtained white monolith is mechanically broken and washed with ethanol and deionized water respectively. Twice, drying in an oven at 120° C. for 12 hours to obtain an organic porous polymer PEM3 containing imidazole functional groups.

[0054] 2), azacyclic carbene / CO 2 Preparation of Adduct Functionalized Organic Porous Polymer PEMC3

[0055] Take 1g of the above-mentioned polymer PEM3 and disperse it in 15g of dimethyl carbonate, stir at room temperature for 2 hours, tr...

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Abstract

A nitrogen heterocyclic carbene / CO 2 The adduct functional organic porous polymer, preparation method and application relate to the technical field of preparation of heterogeneous catalysts in organic chemical industry. The free-radical copolymerization of N-vinylimidazole and ethylene glycol dimethacrylate under solvothermal to prepare an organic porous polymer containing imidazole functional groups, and then solvothermal treatment with dimethyl carbonate. Introduction of nitrogen heterocyclic carbene / CO into polymers 2 For adducts, abandon the traditional complex and corrosive alkaline treatment method, use the green solvent dimethyl carbonate for the conversion of imidazole groups in the polymer and nitrogen heterocyclic carbene / CO 2 The formation of adducts avoids the use of strong bases, and the method is green and easy to operate. The prepared nitrogen heterocyclic carbene / CO 2 Adduct-functionalized organic porous polymers have tunable pore structure, high specific surface area and abundant adduct active sites.

Description

technical field [0001] The invention relates to the technical field of preparation of heterogeneous catalysts in organic chemical industry, in particular to a nitrogen heterocyclic carbene / CO 2 Adduct functional organic porous polymer, preparation method and application. Background technique [0002] carbon dioxide (CO 2 ) is a typical greenhouse gas and is one of the main causes of global warming. At the same time, CO 2 It is a safe, abundant, cheap and renewable carbon resource. Therefore, more and more researchers will CO 2 This "potential carbon resource" is utilized and transformed into many organic chemical products. This initiative can both alleviate environmental problems caused by greenhouse gases and efficiently use resources. Among them, CO 2 Cycloaddition reaction is an "atom-economical" green chemical transformation that can synthesize five-membered cyclic carbonates with pharmaceutical and fine chemical value. Current CO 2 Cycloaddition reactions requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F222/14C08F226/06C08F8/44B01J31/06B01J37/08C07D317/36
CPCB01J31/06B01J37/08B01J2231/341C07D317/36C08F8/44C08F222/1006
Inventor 王晓晨刘安求董强高大明徐杨书函郭建华蔡威盟吴云唐梦龙叶超杰
Owner HEFEI UNIV
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