A kind of metal-organic framework composite material grafted with ionic liquid and its preparation method and application

A metal-organic framework, ionic liquid technology, applied in organic compound/hydride/coordination complex catalysts, organic chemistry, chemical instruments and methods, etc., can solve the problems of non-reusability, difficult separation, etc. , the raw materials are easy to obtain, the catalytic effect is remarkable

Active Publication Date: 2022-07-19
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Even though many catalysts have been developed for cycloaddition reactions, challenges remain regarding their environmental friendliness and cost-effectiveness
Ionic liquids and organic bases are difficult to separate from reaction mixtures due to their homogeneous nature, and conventional ionic liquids, including tertiary ammonium, imidazolium, etc., usually contain harmful halide ions as counter ions and are usually not reusable

Method used

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  • A kind of metal-organic framework composite material grafted with ionic liquid and its preparation method and application
  • A kind of metal-organic framework composite material grafted with ionic liquid and its preparation method and application
  • A kind of metal-organic framework composite material grafted with ionic liquid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Metal-organic framework composite MIL-101-NH grafted with ionic liquid 2 -IL

[0023] (1) The preparation method is as follows

[0024] 1. Metal organic framework MIL-101-NH 2 preparation

[0025] 2 mmol of Cr(NO 3 ) 3 ·9H 2 O, 2 mmol of 2-aminoterephthalic acid, 5 mmol of NaOH and 15 mL of deionized water were added to the autoclave and kept at 150°C for 12 hours to obtain a green product. The green product was washed with deionized water, filtered, and dried at 120 °C. The obtained product was heated at 80 °C with methanol for 12 h, filtered and dried to obtain MIL-101-NH 2 , the yield is 89%.

[0026] 2. Synthesis of ionic liquid 1-vinyl-3-carboxymethylimidazolium bromide (IL)

[0027] Acetone pretreatment: The acetone was placed in a round-bottomed flask and sealed, and nitrogen was continuously introduced for acetone degassing.

[0028] 53 mmol of 1-vinylimidazole and 67 mmol of bromoacetic acid were added to 20 mL of acetone, and the mixture was...

Embodiment 2

[0039] Metal-organic framework composites MIL-101-NH grafted with ionic liquids 2 -IL catalyzes the cycloaddition reaction of carbon dioxide and propylene oxide, and the reaction formula is as follows:

[0040]

[0041] (1) Effects of different catalysts on the cycloaddition reaction of carbon dioxide and propylene oxide

[0042] The method is as follows: take 10 mmol of propylene oxide, 50 mg of catalyst MIL-101-NH 2 -IL was placed in a stainless steel autoclave at 80° C. and 1MPa, and the reaction was stirred for 12 hours, and the product propylene carbonate was obtained by gas phase detection. The calculated yield was 97%.

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Abstract

The present invention relates to a metal-organic framework composite material grafted with ionic liquid and a preparation method and application thereof. The technical scheme adopted is: adding ionic liquid 1-vinyl-3-carboxymethylimidazolium bromide, HATU and triethylamine into N,N-dimethylformamide, stirring evenly at room temperature, adding metal Organic Frameworks MIL‑101‑NH 2 , stirred at room temperature for 22h, the resultant was washed with N,N-dimethylformamide, filtered and dried to obtain metal organic framework composite material MIL-101-NH 2 ‑IL. The metal-organic framework composite material prepared by the invention can efficiently catalyze the cycloaddition reaction of carbon dioxide and epoxide.

Description

technical field [0001] The invention relates to a metal-organic framework composite material grafted with ionic liquid and a preparation method and application thereof, in particular to the preparation of a composite functional catalyst having both Lewis acid sites and Lewis base sites, and a catalyst for catalyzing carbon dioxide Applications in cycloaddition reactions with epoxides. Background technique [0002] Metal-organic frameworks (MOFs) are a class of porous organic-inorganic crystalline hybrid materials formed through the combination of metal centers or clusters with organic ligands, which may be a promising solution for CO 2 The most promising candidate for the dual challenge of capture and transformation. It has a large surface area and well-ordered porous structure, and most importantly, can be designed to selectively capture CO 2 catalyst. Many scholars have adopted various methods to enhance the effect of MOF on CO 2 The trapping ability of , for example, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C07D317/36C08G83/00
CPCB01J31/1691B01J31/2243C07D317/36C08G83/008B01J2231/4288B01J2531/62
Inventor 许维国潘祎刘琳胡加波韩正波
Owner LIAONING UNIVERSITY
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