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Thioether functionalized pyrenyl covalent organic framework material and preparation method and application thereof

A technology of covalent organic framework and functionalization, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, hydrogen production, etc., can solve the problem of lack of covalent organic framework materials and achieve industrial High application value, good visible light response, good response effect

Active Publication Date: 2021-04-06
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

The covalent organic framework material of this technical scheme is mainly based on the hexamethylbiphenyl tetraaldehyde based on the steric effect and the pyrenyl tetramine with fluorescent properties as the construction monomer, and the "Turn-on" type three-dimensional fluorescent covalent covalent compound is synthesized. Valence organic frameworks have rich cavity structures and conjugated three-dimensional skeletons, which show good application prospects in the field of fluorescence sensing, but are difficult to be used for photocatalytic hydrogen production.
[0005] In summary, the existing technology still lacks a covalent organic framework material that can satisfy the application of photocatalytic hydrogen production.

Method used

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  • Thioether functionalized pyrenyl covalent organic framework material and preparation method and application thereof
  • Thioether functionalized pyrenyl covalent organic framework material and preparation method and application thereof
  • Thioether functionalized pyrenyl covalent organic framework material and preparation method and application thereof

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Embodiment 1

[0038] A thioether-functionalized pyrene-based covalent organic framework material prepared by the following method:

[0039] (1) Mix 2,5-bis(2-(ethylthio)ethoxy)terephthalic hydrazide (19.52 mg, 48.5 μmol) and 1,3,6,8-tetra-(p-aldehyde benzene Base)-pyrene (15 mg, 24.25 μmol) was added to 1.1 mL o-dichlorobenzene, absolute ethanol and acetic acid solvent system, the volume ratio of o-dichlorobenzene, absolute ethanol and acetic acid was 5:5:1, and Place in a 5mL Pyrex tube with a body length of 20cm and a neck length of 1cm, sonicate for 3 minutes and mix well.

[0040] (2) The Pyrex tube was frozen in a liquid nitrogen bath, and after thawing, it was evacuated to an internal pressure of 0 mbar and flame-sealed.

[0041] (3) The Pyrex tube was placed in an oven at 120° C. for 3 days to generate a yellow solid.

[0042] (4) The precipitate was collected by suction filtration, washed three times with anhydrous tetrahydrofuran and absolute ethanol, and then washed three times ...

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Abstract

The invention belongs to the field of covalent organic framework materials, and particularly relates to a thioether functionalized pyrenyl covalent organic framework material and a preparation method and application thereof. The preparation method comprises the following steps: adding 2, 5-bis (2-(ethylthio) ethoxy) terephthalylhydrazine and 1, 3, 6, 8-4-(p-formylphenyl)-pyrene into a solvent system, and reacting to obtain the thioether functionalized pyrenyl covalent organic framework material. Equipment and chemical reagents used in the synthesis method are easy to obtain, the process operation is simple and convenient, the applicability is high, the industrial application value is high, the synthesis yield is relatively high, and the pyrenyl covalent organic framework material prepared by the method has good response to visible light, has good potential application value in the field of hydrogen production by photocatalytic decomposition of water, and is easy to popularize and utilize.

Description

technical field [0001] The invention belongs to the field of covalent organic framework materials, and in particular relates to a sulfide-functionalized pyrene-based covalent organic framework material and its preparation method and application. Background technique [0002] Covalent organic frameworks (COFs) are a new type of crystalline organic porous materials formed by dynamic covalent bonds. Compared with traditional porous carbon materials or MOFs materials, it has the advantages of low density and high stability. With the rapid growth of global energy demand, the quest for clean and renewable energy as an alternative to consuming fossil fuels has become more urgent than ever. Due to hydrogen's high energy density and no carbon emissions, hydrogen energy is considered to be one of the most promising energy sources to solve the global energy crisis. Photocatalytic water splitting is an extremely important technological progress process, which can directly realize prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08G73/08B01J31/06C01B3/04
CPCC08G83/008C08G73/08B01J31/063B01J31/069C01B3/042B01J35/23B01J35/39Y02E60/36
Inventor 申燕周志明
Owner HUAZHONG UNIV OF SCI & TECH
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