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Covalent organic framework (COF) nanoparticles and preparation method thereof

A covalent organic framework and nanoparticle technology, applied in the field of nanomaterials, can solve the problems of difficulty in controlling the size range of COF nanoparticles, long time consumption, etc., and achieve the effect of high speed and controllable size.

Pending Publication Date: 2022-05-27
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology

However, such methods are time-consuming and difficult to control the size range of COF nanoparticles

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  • Covalent organic framework (COF) nanoparticles and preparation method thereof

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[0021] The invention provides a method for preparing covalent organic framework (COF) nanoparticles, comprising:

[0022] The imine-based COF and aniline were reacted in the presence of a solvent to obtain P-COF nanoparticles.

[0023] According to the present invention, the preparation method of the imine-based COF is specifically: reacting polyaldehyde-based monomers with 5,10,15,20-tetrakis(4-aminophenyl)porphyrin to obtain P-COF.

[0024] Specifically, firstly, the polyaldehyde-based monomer is reacted with 5,10,15,20-tetrakis(4-aminophenyl)porphyrin to obtain P-COF.

[0025] The polyaldehyde-based monomer of the present invention is selected from terephthalaldehyde, 2,5-dihydroxy terephthalaldehyde, 2,5-bis(2-propynyloxy) terephthalaldehyde, 2,5-bis One of methoxyterephthalaldehyde, 2,5-dihydroxyterephthalaldehyde-modified dialdehyde-based monomer, benzenetricarbaldehyde and 1,3,5-tris(p-formylphenyl)benzene or Several; preferably terephthalaldehyde.

[0026] According...

Embodiment 1

[0048] 2.5 mg P-COF was mixed with 2.5 ml DMF, and 0 μL, 22.5 μL, 55 μL, 110 μL, 220 μL of aniline were added. Ultrasonication was performed using an ultrasonic breaker with a power of 300 W and a time of 30 min. Centrifuge and wash with ethanol after the sonication ends, the centrifugal rate is 10000rpm, the time is 20min, and the number of times of centrifugal washing is 3 times.

[0049] figure 1 It is: COF nanoparticles with controllable size and uniform distribution obtained by molecular exchange at various aniline concentrations in Example 1. Scale: 500nm.

Embodiment 2

[0051] 2.5mg LZU-1COF was mixed with 2.5ml DMF, and 220 μL aniline was added. Ultrasonication was performed using an ultrasonic breaker with a power of 300 W and a time of 30 min. Centrifuge and wash with ethanol after sonication, the centrifugal rate is 10000rpm, the time is 20min, and the frequency of centrifugal washing is 3 times.

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Abstract

The invention provides a preparation method of covalent organic framework (COF) nanoparticles, which comprises the following step: reacting imino COF with aniline in the presence of a solvent to obtain P-COF nanoparticles. The method comprises the following steps: mixing COF, a single-functional-group competitive monomer and an organic solvent, and carrying out molecular exchange under the ultrasonic action to obtain the COF nanoparticles. The method has the advantages of rapidness, size controllability, universality and the like. Compared with a traditional liquid phase stripping method, the method provided by the invention has the advantages that the speed is higher, and the uniformly dispersed COF nanoparticles can be prepared within 30 minutes; the preparation method disclosed by the invention can be used for selectively preparing the COF nano particles with the particle size of 20-150nm; the preparation method provided by the invention has general applicability to the imine COF. The prepared COF nanoparticles have important application value in the fields of biomedicine, gas separation, energy batteries and the like.

Description

technical field [0001] The invention relates to nanomaterials, in particular to a covalent organic framework (COF) nanoparticle and a preparation method thereof. Background technique [0002] Covalent organic framework (COF) materials have become a popular research object in the field of new materials research because of their regular structure, large specific surface area, and porosity. It has important research value for catalysis, gas separation, drug delivery and other fields. (See Kui Wang, Zhe Zhang, Lin Lin, et al. Chemistry of Materials 2019 31(9), 3313-3323). However, the COFs prepared by traditional synthesis methods are large in size and unevenly distributed, making them difficult to utilize. [0003] Although the nanonization of COF materials can be achieved to a certain extent by liquid phase exfoliation. (Wang D, Zhang Z, Lin L, et al. Biomaterials, 2019, 223:119459.). However, such methods are time-consuming and difficult to control the size range of COF n...

Claims

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Application Information

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IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 田华雨王殿巍李彤陈学思
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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