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Zeolitic imidazolate framework material as well as preparation method and application thereof

A technology of zeolite imidazolate and framework materials, applied in organic chemistry and other fields, can solve the problem of less ZIFs materials, and achieve the effects of high thermal stability, high crystallinity, and large specific surface area

Inactive Publication Date: 2017-05-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are still few ZIFs materials synthesized using new ligands, and the performance and application of these ZIFs need to be further discovered, which is also the problem that the present invention attempts to solve

Method used

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  • Zeolitic imidazolate framework material as well as preparation method and application thereof
  • Zeolitic imidazolate framework material as well as preparation method and application thereof
  • Zeolitic imidazolate framework material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Synthesis of ZIFs-like materials using 1-vinylimidazole as a ligand

[0033] Weigh 0.657g (3mmol) Zn(OAc) 2 2H 2 O was dissolved in 40mL of DMF, and then 0.846g (9mmol) of 1-vinylimidazole was added; after stirring evenly, it was transferred to a polytetrafluoroethylene-lined stainless steel reactor, and reacted in a constant temperature blast drying oven at 140°C for 30h; Ultrasonic washing for 5 minutes, cyclic washing for 3 times, centrifugation, and the obtained precipitate was dried at 120°C for 24 hours to obtain the target material.

Embodiment 2

[0035] Synthesis of ZIFs-like materials with 1-allylimidazole as ligand

[0036] Weigh 0.891g (3mmol) Zn (NO 3 ) 2 ·6H 2 O was dissolved in 60mL of DMF, and then 0.972g (9mmol) of 1-allylimidazole was added; after stirring evenly, it was transferred to a polytetrafluoroethylene-lined stainless steel reactor, and reacted in a constant temperature blast drying oven at 120°C for 24h; DMF was ultrasonically washed for 5 minutes, and after cyclic washing for 3 times, centrifuged, and the obtained precipitate was dried at 110°C for 32 hours to obtain the target material.

Embodiment 3

[0038] Synthesis of ZIFs-like Materials Using 1-Acetimidazole as Ligand

[0039] Weigh 0.861g (3mmol) ZnSO 4 ·7H 2 O was dissolved in 80mL DMF, and then 0.660g (6mmol) 1-acetylimidazole was added; after stirring evenly, it was transferred to a polytetrafluoroethylene-lined stainless steel reactor, and reacted in a constant temperature blast drying oven at 160°C for 24h; ultrasonically After washing for 5 minutes and circular washing for 3 times, centrifuge, and dry the obtained precipitate at 130°C for 16 hours to obtain the target material.

[0040] The XRD spectrogram analysis of the ZIFs containing 1-acetylimidazole that the present embodiment makes, such as figure 1 shown. It can be seen from the figure that the synthesized ZIFs new material containing 1-acetylimidazole ligand has a high degree of crystallinity (the diffraction peak intensity of the 110 crystal plane reaches 10318), indicating that the material is obtained under this condition. Crystal structure.

[0...

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Abstract

The invention discloses a zeolitic imidazolate framework material as well as a preparation method and application thereof and belongs to the technical field of novel materials. The mesoporous zeolitic imidazolate framework material is synthesized by selecting six imidazole derivative ligands with specific functional groups and adopting a solvothermal method. The adopted six imidazole derivative ligands comprise 1-vinyl imidazole with carbon-carbon double bonds, 1-allylimidazole, 1-acyllimidazole with an acyl functional group, 4-amino-5-imidazolecarboxamide with amide and amino functional groups and 2-chloro-4-nitroimidazole with nitryl and halogen atoms and 2-bromo-4-nitroimidazole. The zeolitic imidazolate framework material prepared by the preparation method disclosed by the invention has the characteristics of higher crystallinity, greater specific surface area, higher thermal stability and the like; the zeolitic imidazolate framework material disclosed by the invention can be used for adsorption of chemical species, gas storage, sensors, catalysts and other aspects.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a class of zeolite imidazolate framework materials and a preparation method and application thereof. Background technique [0002] The emergence of Metal Organic Frameworks (MOFs for short) has extended the composition of porous materials from inorganic porous materials to inorganic organic porous materials, and thus has new physical and chemical properties. MOFs have a wide variety of metal ions to choose from, and the valence and coordination of metal ions are rich. The pore structure and size can be controlled by selecting different organic ligands or modifying organic ligands with functional groups. [0003] size, thus showing application value in gas adsorption separation. However, due to their high coordination valence state, MOFs are less thermally and chemically stable than inorganic zeolites, and their stability in water is also poor, which limits thei...

Claims

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Application Information

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IPC IPC(8): C07D233/56C07D233/58C07D233/90C07D233/93
CPCC07D233/56C07D233/58C07D233/90C07D233/93
Inventor 石卓于英豪杨婉欣游高雄袁媛王乐夫李雪辉
Owner SOUTH CHINA UNIV OF TECH
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