Method for modifying covalent organic framework material

Abstract

The invention provides a method for modifying a covalent organic framework material. The method comprises the following steps: (1) mixing 1,3,5-tris-(4-aminophenyl)benzene with 2,5-dioxymethyl-terephthalaldehyde, adding o-dichlorobenzene / n-butanol and an acetic acid catalyst, carrying out freezing-exhausting-unfreezing circulation for several times, carrying out flame sealing, heating, centrifugally collecting precipitates, washing, carrying out Soxhlet extraction, drying, and collecting powder, so as to obtain TPB-DMTA-COF; (2) adding 2-methyl-2-butene, a sodium chlorite water solution and glacial acetic acid into dioxane suspension liquid of the TPB-DMTA-COF powder, and stirring in a dark environment, so as to obtain purple solids; and (3) re-oxidizing the purple solids by virtue of thesodium chlorite water solution, and carrying out filtration separation, washing, drying, so as to obtain purple powder. The preparation method is simple, the synthesis conditions are easily controlled, and prepared O-TPB-DMTA-COF powder has a good glycopeptides enriching effect.

Description

technical field [0001] The invention belongs to porous crystalline functional materials, and in particular relates to a modified method for constructing a covalent organic framework material with better glycopeptide enrichment. Background technique [0002] COFs are crystalline materials formed by organic building units linked by covalent bonds and regularly expanded. Compared with amorphous porous material phase, crystalline material has incomparable advantages. The crystalline porous material has a uniform pore structure and a narrow pore size distribution, and has potential applications in catalysis and material separation. Since the synthesis of COFs is a reversible reaction controlled by thermodynamics, the geometric structure, function and stereo orientation of the material can be precisely controlled, and its connection mode can be clarified. The structure of the obtained material can be predicted by the method, and the pore size can also be adjusted by changing the...

AI Technical Summary

Problems solved by technology

[0004] At present, the biggest challenge in the synthesis of COFs is the periodicity of the constructed functionalized COFs materials and the strength of the framework. While pursuing material stability and high specific surface area, it is still difficult to obtain highly crystalline and regular COFs materials.

Although the current research on COFs materials has made great progress, it is still in the initial stage. There are few domestic researches on this, and there are great limitations in its application.

Images