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Method for modifying metal-organic framework compound

A metal-organic framework and compound technology, which is applied in the field of modification of metal-organic framework compounds, can solve the problems that UiO-66 cannot be dissolved, limit the application field of UiO-66, etc., and achieve the effects of improving water solubility and changing surface charge.

Active Publication Date: 2018-08-31
HARBIN INST OF TECH AT WEIHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the technical problem that UiO-66 cannot be dissolved in water, which limits the application field of UiO-66, and provides a method for modifying metal organic framework compounds

Method used

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  • Method for modifying metal-organic framework compound
  • Method for modifying metal-organic framework compound

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Embodiment 1

[0020] A method for modifying a metal organic framework compound, which is realized in the following steps:

[0021] 1. Take 1.2 g UiO-66-NH 2 Solid powder, dispersed in 80 ml tetrahydrofuran, magnetically stirred at 200r / min for 24h, then dispersed by ultrasonic for 0.5h;

[0022] 2. Add the tetrahydrofuran solution of triethylamine and the THF solution of 2-bromoisobutyryl bromide to the solution successively, and react under nitrogen protection at 50°C with 200r / mim magnetic stirring for 48 hours. The tetrahydrofuran solution of triethylamine is composed of 0.60 g triethylamine and 20ml tetrahydrofuran, and 2-bromoisobutyryl bromide in THF was prepared from 0.46g 2-bromoisobutyryl bromide and 20ml THF.

[0023] 3. The solution obtained in step 2 was separated by centrifugation to obtain a yellow solid powder. The yellow solid powder was washed three times, soaked in methanol, and washed again three times. The obtained solid powder was vacuum-dried for 24 hours.

[0024] 4...

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Abstract

The invention provides a method for modifying a metal-organic framework compound, belonging to the technical field of metal-organic frameworks. The invention is to solve the problem of limit of application fields of UiO-66 due to insolubilization of the UiO-66 in water. The method provided by the invention comprises the following steps: step 1, dispersing a metal-organic framework compound namelyUiO-66-NH2 in an organic solvent; step 2, adding an organic solvent solution of 2-bromoisobutyryl bromide and an organic solvent solution of triethylamine, and carrying out a reaction under heating under the protection of nitrogen; step 3, carrying out washing, then carrying out soaking with methanol, and carrying out cleaning, centrifugal separation and drying; step 4, dispersing an obtained material and sodium p-styrenesulfonate in water, adding a tris[2-(dimethylamino)ethyl]amine solution of copper bromide and a sodium ascorbate solution, carrying out a reaction, and carrying out centrifuging so as to obtain a clear liquid; and step 5, carrying out concentration, carrying out washing with methanol, repeatedly carrying out washing and concentration, and carrying out freeze-drying. The method provided by the invention increases the water solubility and surface charges of the UiO-66, and is applied to the fields of drug sustained release, pollutant adsorption, etc.

Description

technical field [0001] The invention belongs to the technical field of metal-organic frameworks; in particular, it relates to a method for modifying metal-organic framework compounds. Background technique [0002] Metal-organic frameworks (Metal-Organic Frameworks), referred to as MOFs, are organic-inorganic hybrid materials with intramolecular pores formed by the self-assembly of organic ligands and metal ions or clusters through coordination bonds. Metal-organic framework material is a crystalline material with periodic network structure formed by self-assembly of metal ions or ion clusters and organic ligands. It is a promising zeolite (organic zeolite analog) material, which can Through the complexation of different metal ions and various rigid bridging organic ligands, metal-organic frameworks with different pore sizes are designed and synthesized, so that the structure of MOFs can be varied infinitely, and some functional properties can be carried on the organic ligand...

Claims

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Application Information

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IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 程喜全王凯王忠祥肖明珍李雨阳张瑛洁
Owner HARBIN INST OF TECH AT WEIHAI
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