Metal organic framework material as well as preparation method and application thereof

A metal-organic framework and raw material technology, applied in the field of material science, can solve the problem of insufficient application strength, and achieve the effects of increasing adsorption capacity, promoting activation and reaction, and high catalytic activity

Inactive Publication Date: 2015-07-22
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Abundant MOFs materials are constantly being developed, but the

Method used

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  • Metal organic framework material as well as preparation method and application thereof
  • Metal organic framework material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 2mmol of adenine (Ad) and 2mmol of isonicotinic acid (Int) into 40ml of N,N-dimethylformamide solution (DMF), stir and dissolve at 120°C;

[0028] (2) 2mmol ZnCl 2 4H 2 Add O to a 100ml high-pressure synthetic kettle lined with polytetrafluoroethylene, slowly add the above solution (1) along the wall, tighten the synthetic kettle, put it into a constant temperature box, slowly rise to 120 ° C, and crystallize at a constant temperature for three days;

[0029] (3) Cool slowly to room temperature at 5°C / h, the solution is clear and no crystals are produced. It shows that under this condition, zinc chloride and the two ligands are difficult to form crystals in DMF solvent.

Embodiment 2

[0031] With embodiment 1, zinc salt in used (2) is by ZnCl 2 4H 2 O was changed to equimolar amount of ZnBr 2 2H 2 O, other conditions remain unchanged. The results showed that the solution remained clear. It shows that under this condition, zinc bromide and the two ligands are also difficult to form crystals in DMF solvent.

Embodiment 3

[0033] With embodiment 1, zinc salt in used (2) is by ZnCl 2 4H 2 O was changed to equimolar amount of ZnI 2 4H 2 O, other conditions remain unchanged. The results showed that colorless crystals were formed, which were recorded as ZnI 2 -Ad-Int-DMF.

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Abstract

The invention discloses a metal organic framework material as well as a preparation method and an application thereof. The material comprises components of raw materials as follows: zinc halide, a nitrogen-rich ligand and a second ligand, wherein the nitrogen-rich ligand is imidazole or adenine, and the second ligand is isonicotinic acid. The metal organic framework material facilitates adsorption and activation of CO2; the cycle opening capacity of epoxides is improved and CO2 is further activated due to introduction of nucleophilic halogen, so that the CO2 reaction is promoted, and the material has high catalytic activity for a CO2 cycloaddition reaction.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a metal organic framework material and its preparation method and application. Background technique [0002] Metal-organic framework materials have shown incomparable advantages in the reversibility of coordination bonds, mild synthesis conditions, design methods, metal composition, and diversity of ligand groups. It has a high specific surface area, rich group loading and pore structure characteristics. Abundant MOFs materials are constantly being developed, but the application of these materials themselves is obviously not enough. MOFs materials are widely used in gas adsorption, especially for CO 2 of adsorption. Nitrogen-enriched MOFs for CO 2 Adsorption has a good promotion effect. Chinese patent CN 102218298B discloses a modified ZIF-8 zeolite imidazole-type framework material. By grafting ethylenediamine to the surface of ZIF-8, it increases the specific su...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C07F3/06B01J31/22
Inventor 陈秉辉王结祥曹茂洪郑进保张诺伟
Owner XIAMEN UNIV
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