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Method of selectively removing partial MOF material ligands

A selective and ligand-based technology, applied in the field of functional materials, can solve problems such as the difficulty in predicting the uniformity of ligand removal, the difficulty in precisely controlling the ratio of ligand removal, and the inability to control the spatial distribution of ligand removal sites. , to achieve the effect of ensuring product purity, ensuring stability, and good regulation

Active Publication Date: 2020-04-24
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still room for improvement in the current means of ligand removal in MOFs. For example, it is difficult to precisely control the ratio of ligand removal, predict the uniformity of ligand removal, and cannot control the removal of ligand sites. spatial distribution, etc.

Method used

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  • Method of selectively removing partial MOF material ligands
  • Method of selectively removing partial MOF material ligands
  • Method of selectively removing partial MOF material ligands

Examples

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Effect test

Embodiment 1

[0023] A method for selectively removing part of the ligands of MOF materials, selectively removing porphyrin-based MOFs with a proportion of 33% ligands at specific crystal sites, specifically comprising the following steps: adding 30 mg of ZrOCl 2 ·8H 2 O. 16 mg of 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin (TCPP) and mixed acid (30 μL formic acid, 2500 μL of 3,3-dimethylbutyric acid) were added to N,N-dimethylbutyric acid In methylformamide solution, ultrasonically disperse and mix evenly, keep warm at 120°C for 12 hours, cool to room temperature, and centrifuge to obtain a powdery solid, which is designated as MOF-525-J33.

[0024] Activating the sample obtained in this example to remove unreacted raw materials and solvent molecules, the specific steps include: immersing the obtained sample in N,N-dimethylformamide for solvent exchange, three times a day, repeated for three days; Immerse in acetone, pour out the acetone after about 8 hours, add new acetone, exchange th...

Embodiment 2

[0031] A method for selectively removing part of the ligands of MOF materials, selectively removing porphyrin-based MOFs with a proportion of 39% ligands at specific crystal sites, specifically comprising the following steps: adding 30 mg of ZrOCl 2 ·8H 2 O. 16 mg of 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin (TCPP) and mixed acid (150 μL formic acid, 2000 μL 3,3-dimethylbutyric acid) were added to N,N-dimethylbutyric acid In methylformamide solution, ultrasonically disperse and mix evenly, keep warm at 120°C for 12 hours, cool to room temperature, and centrifuge to obtain a powdery solid, which is designated as MOF-525-J39.

[0032] Activating the sample obtained in this example to remove unreacted raw materials and solvent molecules, the specific steps include: immersing the obtained sample in N,N-dimethylformamide for solvent exchange, three times a day, repeated for three days; Immerse in acetone, pour out the acetone after about 8 hours, add new acetone, exchange thre...

Embodiment 3

[0039]A method for selectively removing part of the ligands of MOF materials, selectively removing porphyrin-based MOFs with 44% ligands at specific crystal sites, specifically comprising the following steps: adding 30 mg of ZrOCl 2 ·8H 2 O. 16 mg of 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin (TCPP) and mixed acid (400 μL formic acid, 1600 μL 3,3-dimethylbutyric acid) were added to N,N-dimethylbutyric acid In methylformamide solution, ultrasonically disperse and mix evenly, keep warm at 120°C for 12 hours, cool to room temperature, and centrifuge to obtain a powdery solid, which is designated as MOF-525-J44.

[0040] Activating the sample obtained in this example to remove unreacted raw materials and solvent molecules, the specific steps include: immersing the obtained sample in N,N-dimethylformamide for solvent exchange, three times a day, repeated for three days; Immerse in acetone, pour out the acetone after about 8 hours, add new acetone, exchange three times a day, an...

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Abstract

The invention discloses a method for selectively removing partial MOF material ligands, which achieves the purpose of selectively removing partial ligands in a porphyrin-based MOF material by regulating the dosage of a composite organic acid regulating agent in the synthesis process of the porphyrin-based MOF material. In the porphyrin-based MOF material synthesis process, selective removal of partial ligands can be achieved in one step, other regulators do not need to be additionally introduced, the regulation and control process can be greatly simplified, and the product purity can be guaranteed; meanwhile, the stability of the MOF structure can be effectively ensured; the method has good regulation and control effects on the density of porphyrin in the MOF material and the diffusion ofother substances in the porphyrin MOFs material, is beneficial to further improving the effective application of the porphyrin MOFs in the fields of gas separation, photocatalysis, medical treatment and the like, and has important research and popularization values.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a method for selectively removing part of MOF material ligands. Background technique [0002] Metal-organic frameworks [metal-organic Frameworks, MOFs for short, also known as metal-organic frameworks, metal-organic framework materials, metal-organic complexes or coordination polymers] are a class of inorganic porous materials (O.M.Yaghi, M. .O'Keeffe, N.W.Ockwig, H.K.Chae, M.Eddaoudi, J.Kim, Nature 2003, 423, 705.), formed by periodic arrangement of molecular building blocks. Porphyrin-based metal-organic framework materials have been widely used in the fields of biology, catalysis, and medicine, and have important application value and research prospects in industrial production and scientific research. [0003] Expanding the structure of porphyrin-based MOFs materials, such as removing part of the ligands in porphyrin-based MOFs, has a good control ef...

Claims

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Application Information

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IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 邓鹤翔宫煊舒于飞
Owner WUHAN UNIV