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A method for selectively removing ligands from some MOF materials

A selective and ligand-based technology, applied in the direction of organic chemistry, etc., can solve the problem that it is difficult to precisely control the proportion of removed ligands, it is difficult to predict the uniformity of removed ligands, and it is impossible to control the spatial distribution of removed ligand sites. problem, to achieve the effect of ensuring product purity, good regulation and stability

Active Publication Date: 2021-04-27
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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  • A method for selectively removing ligands from some MOF materials
  • A method for selectively removing ligands from some MOF materials
  • A method for selectively removing ligands from some MOF materials

Examples

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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 the 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 ...

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 part of MOF material ligands. By regulating the amount of a composite organic acid regulator in the synthesis process of porphyrin-based MOF material, part of the ligands in the porphyrin-based MOF material is achieved. Purpose of selective removal. The invention can realize the selective removal of part of the ligands in one step during the synthesis process of the porphyrin-based MOF material, without additionally introducing other regulators, can greatly simplify the regulation process, and is conducive to ensuring product purity; meanwhile, the MOF structure can be effectively guaranteed It has a good control effect on the density of porphyrins in MOF materials and the diffusion of other substances in porphyrin MOFs materials, which is beneficial to further improve the performance of porphyrin MOFs in gas separation, photocatalysis, medical treatment and other fields. Effective application, has important research and promotion value.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C07D487/22
CPCC08G83/008
Inventor 邓鹤翔宫煊舒于飞
Owner WUHAN UNIV