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Functionalization of a metal-organic framework material uio-67-4me and its functionalized products and applications

A metal-organic framework, functionalized technology, applied in chemical instruments and methods, other chemical processes, separation methods, etc., can solve the problems of limited types of MOFs and application limitations, and achieve good indoor humidity automatic regulation function, good adsorption- Desorption performance, good recyclability effect

Active Publication Date: 2022-06-24
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the more than 20,000 kinds of MOFs that have been reported, only dozens of them have good water stability. For example, the patent CN201410554067. 6 provides a modification method to effectively improve the water stability and ammonia adsorption performance of MOFs, etc., but generally the types of MOFs with water stability are limited, which makes MOFs in all water-facing applications. extremely restrictive

Method used

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  • Functionalization of a metal-organic framework material uio-67-4me and its functionalized products and applications
  • Functionalization of a metal-organic framework material uio-67-4me and its functionalized products and applications
  • Functionalization of a metal-organic framework material uio-67-4me and its functionalized products and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Example 1 Preparation of UiO-67-4Me

[0084] S1. 3,3',5,5'-tetramethyl-[1,1'-biphenyl]-4,4'-dicarboxylic acid (0.03mmol / 10.0mg), ZrCl 4 The mixed solution of (0.036mmol / 8.5mg), trifluoroacetic acid (0.67mmol / 50uL) and N,N-dimethylformamide (2mL) was put into a 10mL glass bottle, and after ultrasonic mixing, it was transferred to a 120°C oven Medium constant temperature for 48 hours;

[0085] S2. Cool the vial after the reaction in step S1 to room temperature, centrifuge and filter to obtain a solid product, and wash with N,N-dimethylformamide for 5 times to obtain UiO-67-4Me.

Embodiment 2

[0086] Example 2 Preparation of UiO-67-4Me amino / carboxyl / hydroxyl / diamino functionalized product

[0087] With UiO-67-4Me and 2-amino-[1,1'-biphenyl]-4,4'-dicarboxylic acid or 2-carboxy-[1,1'-biphenyl]-4,4'-dicarboxylic acid Or 2-hydroxy-[1,1'-biphenyl]-4,4'-dicarboxylic acid or 2,2'-diamino-[1,1'-biphenyl]-4,4'-dicarboxylic acid as raw material Preparation of UiO-67-4Me-NH separately 2 -X% (x=29, 38, 47, 59, 67), UiO-67-4Me-COOH-38%, UiO-67-4Me-OH-37%, UiO-67-4Me-2NH 2 -38% of the prepared flow diagram as in figure 1 shown.

[0088] 1. UiO-67-4Me-NH 2 - Preparation of x% (x=29, 38, 47, 59, 67)

[0089] S1. UiO-67-4Me (0.052mmol / 130.0mg) and different amounts of 2-amino-[1,1'-biphenyl]-4,4'-dicarboxylic acid (respectively 13.5mg / 0.052mmol, 17.8 mg / 0.069mmol, 21.9mg / 0.084mmol, 27.8mg / 0.107mmol, 31.5mg / 0.121mmol) and N,N-dimethylformamide (10mL) mixed solution was put into a 20mL glass bottle, after ultrasonic mixing , transferred to a constant temperature of 85°C for 24...

Embodiment 3

[0100] Example 3 Determination of specific surface area and pore volume of UiO-67-4Me amino / carboxyl / hydroxyl / diamino functionalized product

[0101] (1) Activation

[0102] S1. UiO-67-4Me-NH prepared by UiO-67-4Me and Example 2 2 -29%, UiO-67-4Me-NH 2 -38%, UiO-67-4Me-NH 2 -47%, UiO-67-4Me-NH 2 -59%, UiO-67-4Me-NH 2 -67%, UiO-67-4Me-COOH-38%, UiO-67-4Me-OH-37%, UiO-67-4Me-2NH 2 -38% solids were soaked in N,N-dimethylformamide at a ratio of 50mg:10mL for 2 days, with N,N-dimethylformamide replaced every 8 hours.

[0103] S2. Soak the solid soaked in step S1 in acetone at a ratio of 50 mg: 10 mL for 2 days, and replace the acetone every 8 hours.

[0104] S3. The solid soaked in step S2 is separated by centrifugation, and then left in the air for preliminary drying. Then vacuum heated to 100°C in a closed container and kept for 10 hours to obtain activated UiO-67-4Me, UiO-67-4Me-NH 2 -29%, UiO-67-4Me-NH 2 -38%, UiO-67-4Me-NH 2 -47%, UiO-67-4Me-NH 2 -59%, UiO-67-4Me-NH ...

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Abstract

Functionalization of a metal-organic framework material UiO-67-4Me and its functionalized product and application. The functionalization is to disperse UiO-67-4Me and biphenyl dicarboxylic acid with different functional groups in N,N-dimethylformamide, and heat the reaction to obtain functionalized products with different functional groups. The invention adopts simple solvothermal reaction to introduce biphenyl dicarboxylic acid ligands with different functional groups into UiO-67-4Me, thereby realizing the functionalization of the material. The specific surface area, porosity and water adsorption performance of the obtained UiO-67-4Me functionalized product are all significantly improved, have good water absorption-dehydration performance, and have good recyclability in the field of water adsorption-desorption, and Automatic regulation of the ambient humidity. In addition, the obtained functionalized product has a good capture ability for formaldehyde, ammonia, benzene, toluene, n-hexane and sulfur dioxide at a relative humidity of 50%, which is beneficial to purifying the environment and regulating the humidity of the environment.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, and in particular relates to the functionalization of a metal-organic framework material UiO-67-4Me and its functionalized products and applications. Background technique [0002] As a class of porous materials obtained by self-assembly of metal ions and organic ligands driven by coordination, metal-organic frameworks (MOFs) are characterized by their large specific surface area, high porosity, easy functionalization of pores, and diverse and modifiable structures. Such hot spots make it have very promising application prospects in many fields such as heterogeneous catalysis, gas storage and separation, sensing, proton conduction, biological applications, and magnetic materials. [0003] The structure and composition of MOFs are easily regulated and functionalized by post-modification methods. However, among the more than 20,000 MOFs that have been reported, only dozens of them have g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01J20/22B01D53/02
CPCC08G83/008B01J20/226B01D53/02Y02A50/20
Inventor 苏成勇朱能秀韦张文
Owner SUN YAT SEN UNIV