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Azine-connected benzotrithienyl covalent organic framework material as well as preparation method and application thereof

A benzotrithienyl, covalent organic framework technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, inorganic chemistry, etc., can solve harsh conditions, covalent organic framework materials Poor crystal shape and other problems, to achieve the effect of strong applicability, easy promotion and utilization, and easy acquisition

Active Publication Date: 2021-07-09
FUZHOU UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the traditional solvothermal method prepares azine covalent organic frameworks with relatively harsh conditions and the obtained covalent organic framework materials have poor crystal shape, and provides an imine exchange strategy for preparing azine covalent organic framework materials Method and application of photocatalytic decomposition of water to produce hydrogen

Method used

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  • Azine-connected benzotrithienyl covalent organic framework material as well as preparation method and application thereof
  • Azine-connected benzotrithienyl covalent organic framework material as well as preparation method and application thereof
  • Azine-connected benzotrithienyl covalent organic framework material as well as preparation method and application thereof

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Embodiment 1

[0025] Add benzo[1,2-b:3,4-b′:5,6-b′]trithiophene-2,5,8-trialdehyde (BTT: 165 mg, 0.5 mmol) into the pressure bottle, Aniline (230 μL, 2.5 mmol), 1,4-dioxane (15 mL) and glacial acetic acid (0.15 mL) were placed in an oil bath at 120°C under reflux for 12 hours. Then a yellow solid was precipitated in ice methanol, and the solid was collected by suction filtration, washed three times with methanol, and dried under vacuum at 60°C overnight to obtain an intermediate.

[0026] Put the intermediate (33.1 mg, 0.06 mmol), hydrazine hydrate (5 μL, 0.1 mmol) and 1 mL o-dichlorobenzene / 1,4-dioxane (volume ratio 1:1) mixed solution in a Pyrex tube , sonicate for 10 minutes to obtain a uniform dispersion, then add acetic acid (0.1 mL, 6M). Freeze-thaw cycle degassing in a liquid nitrogen bath for 3 times, and react at 120 °C for 3 days after vacuum sealing, cool to room temperature, collect the solid by suction filtration, wash with methanol, dichloromethane and acetone three times resp...

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Abstract

The invention relates to an azine-connected benzotrithienyl covalent organic framework material as well as a preparation method and an application thereof. The invention belongs to the field of material preparation, and particularly relates to a synthesis scheme for preparing an azine covalent organic framework material through an imine exchange strategy and an application of the azine covalent organic framework material to hydrogen production through photocatalytic decomposition of water. The preparation method comprises the following steps: reacting aniline serving as a molecular regulator with benzo [1, 2-b: 3, 4-b': 5, 6-b'] trithiophene-2, 5, 8-trialdehyde to obtain an intermediate, and carrying out imine exchange on the intermediate and hydrazine hydrate to finally obtain the azine covalent organic framework material (BTT-Azine COF). The azine covalent organic framework is prepared through an imine exchange strategy, is applied to photocatalytic decomposition of water to produce hydrogen, and has potential application value in the field of photocatalysis.

Description

technical field [0001] The invention belongs to the field of material preparation and photocatalysis, and specifically proposes a method for preparing azine COF by an imine exchange strategy, and the application of photocatalytic decomposition of water to produce hydrogen. Background technique [0002] In recent years, due to the rapid development of modern industry and the extensive economic development model, a large number of fossil fuels have been developed and utilized. People are facing serious problems of resource shortage and environmental pollution. Finding, developing and utilizing new green energy has become one of the hot topics of current scientific research. As a green, pollution-free and inexhaustible energy source, solar energy is considered to be the most attractive alternative energy source. Inspired by photosynthesis, the conversion of solar energy to chemical energy by storing solar energy in chemical bonds through photocatalytic technology has become an...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J31/06C01B3/04
CPCB01J31/06C01B3/042C01B2203/107C08G83/008Y02E60/36
Inventor 李留义潘国栋许鹏于岩
Owner FUZHOU UNIV
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