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Covalent organic framework material in hydrazone bond connection and preparation method and application of covalent organic framework material

A covalent organic framework and hydrazone bond technology, applied in the field of two-dimensional covalent organic framework materials, can solve the problems of impractical application and poor stability

Inactive Publication Date: 2019-09-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the increase in demand and the advancement of technology, various fluorescent materials have appeared, but most of them have poor stability and cannot be practically applied in the end.

Method used

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  • Covalent organic framework material in hydrazone bond connection and preparation method and application of covalent organic framework material
  • Covalent organic framework material in hydrazone bond connection and preparation method and application of covalent organic framework material
  • Covalent organic framework material in hydrazone bond connection and preparation method and application of covalent organic framework material

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Experimental program
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preparation example Construction

[0021] The method for preparing the above-mentioned covalent organic framework material linked by hydrazone bonds is characterized by comprising the following steps:

[0022] (1) Add 2,4,6-triformylphenol, 4,4'-biphenyldicarboxylic hydrazide, 1,4-dioxane and 1,3,5-trimethylbenzene to the vacuum tube in sequence at room temperature Ultrasound for 1 hour, add acetic acid after the ultrasound is completed, and perform three liquid nitrogen freezing and degassing operations to achieve an oxygen-free vacuum environment in the bottle.

[0023] (2) Put the vacuum tube processed in step (1) into an oven for reaction, raise the oven temperature to 120° C., react at this temperature for 72 hours, finally lower the oven temperature to room temperature, and filter to obtain the crude product.

[0024] (3) The crude product obtained by filtration was washed with tetrahydrofuran solution until the solution was clear and transparent, solvent exchange was performed with acetone, and vacuum-dr...

specific Embodiment 1

[0030] 0.0178g (0.1mmol) of 2,4,6-triformylphenol, 0.0405g (0.15mmol) of 4,4'-biphenyldicarboxylic hydrazide, 1.5mL of 1,4-dioxane and 1.5mL of 1,3, 5-Trimethylbenzene was sequentially added to the vacuum tube. Sonicate at room temperature for 1 hour. After sonication, use a pipette gun to accurately add 0.5 mL of acetic acid with a concentration of 5 M, and perform three liquid nitrogen freezing and degassing operations. The vacuum tube in a sealed state was put into an oven for reaction, and the temperature of the oven was raised to 120° C., and the reaction was carried out at this temperature for 72 hours. After the reaction, the oven temperature was lowered to room temperature, filtered, washed with tetrahydrofuran until the solution was clear and transparent, solvent exchanged with acetone, and vacuum-dried at 100° C. for 24 hours to obtain 0.045 g of a covalent organic framework material linked by hydrazone bonds.

[0031] Its product XRD and product powder XRD diffract...

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Abstract

The invention belongs to the field of covalent organic framework materials and in particular relates to a covalent organic framework material in hydrazone bond connection and a preparation method andapplication of the covalent organic framework material. The covalent organic framework material has a structure unit belonging to a hexagonal system PM space group, has cell parameters a of 38.93689 Angstrom, b of 3.49918 Angstrom, c of 37.30494 Angstrom, alpha of 90 degrees, beta of 62.61703 degrees and gamma of 90 degrees, and has regular hexagonal pores, and the aperture is 34 Angstrom. The covalent organic framework material in hydrazone bond connection is prepared from 2,4,6-triformyl phenol and 4,4'-biphenyl diformylhydrazine by using a solvothermal method, has a conjugated structure formed through enol interconversion, and has fluorescence.

Description

technical field [0001] The invention belongs to the field of covalent organic framework materials, and in particular relates to a two-dimensional covalent organic framework material connected by hydrazone bonds, a preparation method and application of the material. Background technique [0002] With the increase in demand and the advancement of technology, various fluorescent materials have emerged, but most of them have poor stability and cannot be practically applied in the end. Covalent Organic Frameworks (COFs), as an emerging class of porous organic crystalline materials, are currently attracting extensive attention due to their various attractive physical and chemical properties and applications. The organic building blocks are connected by hydrazone bonds to form an extended two-dimensional covalent organic framework material with high crystallinity, permanent porosity, high surface area, tunable pore size, and excellent chemical and thermal stability. Based on the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K11/06
CPCC08G83/008C09K11/06C09K2211/1425C09K2211/1433
Inventor 张凤鸣杨延张洪语丁为民路阳
Owner HARBIN UNIV OF SCI & TECH