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Metal organic framework material based on lead nitrate and application thereof

A metal-organic framework and lead nitrate technology, which is applied in the direction of lead organic compounds, organic chemistry, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of scarcity, achieve catalytic silicocyanation reaction, and simple preparation method , Satisfactory catalytic effect

Active Publication Date: 2016-01-13
芜湖数字信息产业园有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Importantly, this type of crystal has well-defined pores and surface-independent Lewis acid sites, which have potential applications in the selection of size and shape of heterogeneous catalysts, which are somewhat similar to zeolite molecular sieve catalysis, however, in In the current research on metal-organic frameworks, this kind of research has been relatively scarce. Therefore, metal-organic framework materials have a large research space for applications in hydrogen storage, adsorption, and especially for catalysis.

Method used

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  • Metal organic framework material based on lead nitrate and application thereof
  • Metal organic framework material based on lead nitrate and application thereof
  • Metal organic framework material based on lead nitrate and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 A metal-organic framework based on lead nitrate [Pb 2 (BPTC)(H 2 O) 2 ]·2H 2 o

[0028] resolve resolution:

[0029] 1) 15mgPb(NO 3 ) 2 , 5mgH 4 BPTC, 1.5mLDMA, added to the container in turn, ultrasonic vibration to Pb(NO 3 ) 2 and H 4 BPTC is uniformly dispersed in DMA.

[0030] 2) After sealing the container, put it into an oven at 85° C. for 72 hours to react to obtain white cubic crystals.

[0031] 3) The crystals were washed three to five times with DMA and filtered to obtain colorless and transparent cubic crystals with a crystal yield of 72%.

[0032] The results of X-ray diffraction analysis showed that metal-organic framework materials [Pb 2 (BPTC)(H 2 O) 2 ]·2H 2 O belongs to the triclinic crystal system, space group. Single crystal analysis shows that the metal-organic framework material has a three-dimensional pore structure without crossing inside the pore. It consists of two independent BPTC ligands and two different Pb(II) ion...

Embodiment 2

[0035] Example 2 The size-selective catalytic properties of metal-organic framework materials based on lead nitrate to catalyze silicocyanation reaction

[0036] The metal-organic framework material based on lead nitrate prepared in Example 1 was activated before use, and dried in a vacuum oven at 100° C. for 8 hours, as a catalyst for the following silicocyanation reaction.

[0037] The reaction is anhydrous and oxygen-free. Put 0.004mol of aromatic aldehyde and 5mg of catalyst into a 10mL Ceylon tube. After evacuating nitrogen for three times, ensure that there is no oxygen and water vapor in the Ceylon tube, and then transfer 5mL with a muffler. Dry degassed dichloromethane and 0.5 ml trimethylsilylcyanide (0.004 mol) were furnace and molecular sieve treated. The experimental temperature was 40°C, and the reaction process was monitored by gas chromatography. The conversion rate at different reaction times was as follows: Figure 4 shown. After 24 hours of reaction, the co...

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Abstract

The invention relates to a metal organic framework material based on lead nitrate and application thereof. The technical scheme is that metal salt Pb(NO3)2, ligand H4BPTC and a solvent N,N-dimethylacetamide are placed in a container, ultrasonic oscillation is performed until the metal salt and the ligand are evenly scattered into the solvent; the solvent is sealed and then placed in an oven to stand for 72 h at 85 DEG C, white cube blocky crystal is obtained, washed, filtered and dried, and a target product is obtained. A method for preparing the metal organic framework material is simple, the metal organic framework material is stable in structure and has a good three-dimensional pore structure, the silicon cyanation can be catalyzed efficiently, reaction substrate aromatic aldehyde has size selectivity, and the catalytic reaction is performed on the anhydrous and oxygen-free conditions.

Description

technical field [0001] The present invention relates to a metal organic framework material based on lead nitrate. Specifically, it relates to a metal-organic framework material with high catalytic activity for the silicocyanation reaction, and the catalyst is size-selective for the substrate aromatic aldehyde. Background technique [0002] The main features of metal-organic frameworks (MOFs) as catalysts are: (1) ordered porous structure; (2) flexible and dynamic behavior of guest molecules; (3) designable functional channels. Importantly, this type of crystal has well-defined pores and surface-independent Lewis acid sites, which have potential applications in the selection of size and shape of heterogeneous catalysts, which are somewhat similar to zeolite molecular sieve catalysis, however, in In the current research on metal-organic frameworks, such research has been relatively scarce. Therefore, metal-organic framework materials have a large research space for applicatio...

Claims

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Application Information

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IPC IPC(8): C07F7/24B01J31/22C07F7/18
Inventor 张渝阳罗艳娟丁琳琳耿直
Owner 芜湖数字信息产业园有限公司
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