N-heterocycle molecule modified UiO-66-NH2 material with stable structure and preparation method of nitrogen heterocyclic molecule modified UiO-66-NH2 material

A technology of uio-66-nh2 with stable structure, applied in chemical instruments and methods, 4/14 group organic compounds without C-metal bonds, compounds of group 4/14 elements of the periodic table, etc., can solve the problem of poor performance Prominent, less functional sites and other issues, to achieve the effect of excellent structural stability

Active Publication Date: 2021-06-29
肇庆市武大环境技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the existing UiO-66-NH 2 The problem of few functional sites on the surface of the material and poor performance, the purpose of the present invention is to provide a structurally stable nitrogen heterocyclic molecule modified UiO-66-NH 2 The material and its preparation method are modified in one step by a simple post-synthesis modification method. The obtained modified material is soaked in an aqueous solution with a pH of 2-12 for one week, one day in reflux water, and one month in deionized water. excellent stability

Method used

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  • N-heterocycle molecule modified UiO-66-NH2 material with stable structure and preparation method of nitrogen heterocyclic molecule modified UiO-66-NH2 material
  • N-heterocycle molecule modified UiO-66-NH2 material with stable structure and preparation method of nitrogen heterocyclic molecule modified UiO-66-NH2 material
  • N-heterocycle molecule modified UiO-66-NH2 material with stable structure and preparation method of nitrogen heterocyclic molecule modified UiO-66-NH2 material

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Experimental program
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Effect test

Embodiment 1

[0023] (1)UiO-66-NH 2 Preparation of:

[0024] Add 20g of zirconium tetrachloride and 40g of 2-aminoterephthalic acid into 200mL of N,N-dimethylformamide, and add 5mL of 0.6mol / L hydrochloric acid, react at 80°C for 6h, and obtain a light yellow powder The solid was washed three times with N,N-dimethylformamide, collected and dried under vacuum at 60°C to obtain UiO-66-NH 2 ;

[0025] (2)UiO-66-NH 2 modification of:

[0026] UiO-66-NH 2 5g, 2.5g of isophthalaldehyde and 2.5g of 3,5-diamino-1,2,4-triazole were added to 50mL of N,N-dimethylformamide, and reacted at 25°C for 2h to obtain The dark yellow powder solid was washed three times with N,N-dimethylformamide, collected and dried under vacuum at 40°C to obtain the modified UiO-66-NH 2 .

Embodiment 2

[0028] UiO-66-NH 2 Prepare with embodiment 1;

[0029] UiO-66-NH 2 5g, 2.5g of isophthalaldehyde and 5g of 3,5-diamino-1,2,4-triazole were added to 50mL of N,N-dimethylformamide, and reacted at 25°C for 2h, the obtained deep The yellow powder solid was washed three times with N,N-dimethylformamide, collected and dried under vacuum at 40°C to obtain the modified UiO-66-NH 2 .

Embodiment 3

[0031] UiO-66-NH 2 Prepare with embodiment 1;

[0032] UiO-66-NH 2 5g, 5g of isophthalaldehyde and 2.5g of 3,5-diamino-1,2,4-triazole were added to 50mL of N,N-dimethylformamide, and reacted at 25°C for 2h, the obtained deep The yellow powder solid was washed three times with N,N-dimethylformamide, collected and dried under vacuum at 40°C to obtain the modified UiO-66-NH 2 .

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Abstract

The invention discloses a N-heterocycle molecule modified UiO-66-NH2 material with a stable structure and a preparation method of the N-heterocycle molecule modified UiO-66-NH2 material, and the N-heterocycle molecule modified UiO-66-NH2 material is prepared by carrying out Schiff base reaction on m-phthalaldehyde, 3, 5-diamino-1, 2, 4-triazole and a-NH2 group on the surface of UiO-66-NH2. According to the invention, UiO-66-NH2 is synergistically modified through isophthalaldehyde and 3, 5-diamino-1, 2, 4-triazole, 3, 5-diamino-1, 2, 4-triazole molecules are introduced through a post-synthesis modification mode by taking isophthalaldehyde as a bridge based on an active-NH2 group on a skeleton, so that the number of nitrogen atoms on the surface of a modified material can be remarkably increased, the multi-functionalization of materials can be realized, the obtained modified material shows excellent stability after being soaked in an aqueous solution with the pH value of 2-12 for one week, soaked in reflux water for one day and soaked in deionized water for one month.

Description

technical field [0001] The invention relates to a structurally stable modified zirconium-based metal-organic framework material and a preparation method thereof, in particular to a structurally stable nitrogen heterocyclic molecule modified UiO-66-NH 2 The material and its preparation method belong to the technical field of UiO-66 modification. Background technique [0002] Metal-organic frameworks (MOFs) are a class of organic-inorganic hybrid materials with a periodic network structure formed by the self-assembly of metal ions or metal clusters and organic ligands. Functional adjustability, so it has a wide range of applications in many fields, such as adsorption, magnetism, conductivity, fluorescence, drug loading, etc. However, for most MOF materials, their stability is a huge hindrance towards practical applications, mainly due to the weak coordination bonds in the crystal structure. Therefore, it is of great significance to optimize the structurally stable MOF system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C07F7/00
CPCC08G83/008C07F7/003
Inventor 侯浩波冯露曾天宇董祎挈
Owner 肇庆市武大环境技术研究院
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