A kind of imidazole functionalized covalent triazine framework material and its preparation method and application

A covalent triazine and framework material technology, applied in chemical instruments and methods, carbon dioxide or inorganic carbonate preparation, catalytic reactions, etc., can solve problems such as poor catalytic performance, achieve high-efficiency catalysis, and simple synthesis process

Active Publication Date: 2022-04-26
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above covalent triazine framework materials are used to adsorb CO 2 , photocatalytic CO 2 Reduction to CO or adsorption of heavy metals, but poor catalytic performance for the cycloaddition reaction of carbon dioxide and epichlorohydrin

Method used

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  • A kind of imidazole functionalized covalent triazine framework material and its preparation method and application
  • A kind of imidazole functionalized covalent triazine framework material and its preparation method and application
  • A kind of imidazole functionalized covalent triazine framework material and its preparation method and application

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preparation example Construction

[0032] The present invention provides the preparation method of the imidazole-functionalized covalent triazine frame material described in the technical scheme, comprising the following steps:

[0033] Mix the covalent triazine framework, N,N'-carbonyldiimidazole and furan organic solvent for addition reaction to obtain imidazole functionalized covalent triazine framework material;

[0034] The repeating structural unit having the structure shown in formula II of the covalent triazine framework:

[0035]

[0036] In Formula II, the wavy line represents a repeating basic unit.

[0037] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0038] In the present invention, the preparation method of the covalent triazine framework (CTF) at room temperature preferably includes the following steps: mixing p-phenylenediamine, inorganic alkaline reagent, water, cyanuric chlori...

Embodiment 1

[0057] P-phenylenediamine (0.81g), sodium carbonate (0.3175g) and deionized water (10mL) were mixed to obtain a p-phenylenediamine solution; cyanuric chloride (0.3688g) and acetone (25mL) were mixed to obtain three Polycyanuric chloride solution: adding the p-phenylenediamine solution dropwise to the cyanuric chloride solution, reacting at room temperature for 8 hours, then suction-filtering the obtained reaction system, washing the obtained solid product with water three times, acetone Washed 3 times and washed 3 times with methanol, placed in a vacuum drying oven at 90° C. for 10 h in vacuum to obtain a covalent triazine framework (CTF).

[0058] A covalent triazine framework (0.75 g) was mixed with THF (25 mL) to obtain a covalent triazine framework solution; N,N'-carbonyldiimidazole (1.6215 g) was mixed with THF (20 mL) to obtain N,N' -carbonyldiimidazole solution; mix the covalent triazine framework solution and N,N'-carbonyldiimidazole solution, reflux reaction at 65°C f...

Embodiment 2

[0064] P-phenylenediamine (0.324g), sodium carbonate (0.3175g) and deionized water (10mL) were mixed to obtain a p-phenylenediamine solution; cyanuric chloride (0.3688g) and acetone (20mL) were mixed to obtain three Polycyanuric chloride solution: adding the p-phenylenediamine solution dropwise to the cyanuric chloride solution, reacting at room temperature for 12 hours, then suction-filtering the obtained reaction system, washing the obtained solid product with water three times, acetone Washed three times and washed three times with methanol, placed in a vacuum drying oven at 80° C. for 12 hours in vacuum to obtain a covalent triazine framework.

[0065] Mix the covalent triazine framework (0.75 g) and tetrahydrofuran (25 mL) to obtain a covalent triazine framework solution; mix N,N'-carbonyldiimidazole (1.2 g) and tetrahydrofuran (20 mL) to obtain N,N' -carbonyldiimidazole solution; mix the covalent triazine framework solution and N,N'-carbonyldiimidazole solution, reflux r...

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Abstract

The invention provides an imidazole-functionalized covalent triazine framework material and a preparation method and application thereof, belonging to the technical field of catalysts. The imidazole-functionalized covalent triazine framework material provided by the present invention has repeating structural units of the structure shown in formula I, wherein the covalent triazine framework contains abundant nitrogen, and the mesoporous structure it has helps the substrate Diffusion, give full play to the role of the active site. When the cycloaddition reaction of carbon dioxide and epichlorohydrin is catalyzed by using only the covalent triazine framework as a catalyst without the assistance of a co-catalyst, the ring-opening of epichlorohydrin is difficult and the catalytic effect is not obvious. However, imidazole groups are introduced into the imidazole functionalized covalent triazine framework material provided by the present invention. The imidazole groups have a certain nucleophilic ability and can attack epoxides, leading to the ring opening of epoxides, and can also activate carbon dioxide. , can achieve high-efficiency catalysis for the cycloaddition reaction of carbon dioxide and epichlorohydrin without adding other cocatalysts.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to an imidazole-functionalized covalent triazine framework material and a preparation method and application thereof. Background technique [0002] Covalent triazine framework material (CTF) is a new class of porous organic materials developed in recent years. Due to the advantages of large specific surface area, uniform porous structure and stable chemical structure, this material is widely used in gas Storage and separation, adsorption, catalysis and other technical fields. For example, Document 1 (Arindam Modak, Malay Pramanik, Shinji Inagaki and Asim Bhaumik, J.Mater.Chem.A, 2014, 2, 11642-11650.) discloses a novel triazine functionalized porphyrin-based porous organic polymer TPOP -1, is in FeCl 3 The hydrothermal reaction of 4,4′,4′-(1,3,5-triazine-2,4,6-triphenyl)tri(oxy)benzaldehyde and pyrrole in glacial acetic acid in the presence of Covalent triazine framework materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02B01J31/06C07C69/96C07C68/04
CPCC08G73/0273B01J31/064C07C68/04B01J2231/49C07C69/96Y02P20/141
Inventor 代威力毛培李兵张书渠杨丽霞罗胜联罗旭彪邹建
Owner NANCHANG HANGKONG UNIVERSITY
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