Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Metal-organic framework materials based on heteroaryl functional group ligands and their preparation methods and applications

A technology of metal-organic frameworks and ligands, applied in non-metallic elements, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem that MOFs cannot exist stably and stability is difficult to be guaranteed, etc. problem, to achieve the effect of excellent catalytic hydrogen production of formic acid, good ion exchange capacity, and simple preparation method

Active Publication Date: 2022-07-19
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the basis of the above strategies, although some MOFs can exist stably in conventional mild operating environments, their stability under harsh conditions (strong acid, strong alkali, strong oxidizing, strong corrosive and high ion concentration solutions) However, it is difficult to guarantee, for example, the recovery of nuclear waste is often carried out under strong acid conditions and the desalination of seawater requires materials to have the ability to resist high ion concentrations, and most MOFs cannot exist stably in such harsh environments
Therefore, it is still a challenge to synthesize highly stable MOFs and explore more effective strategies to stabilize such materials.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Metal-organic framework materials based on heteroaryl functional group ligands and their preparation methods and applications
  • Metal-organic framework materials based on heteroaryl functional group ligands and their preparation methods and applications
  • Metal-organic framework materials based on heteroaryl functional group ligands and their preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Example 1 Synthesis of triazole-based metal-organic framework (PFC-8)

[0075] 114 mg of nickel chloride hexahydrate were dissolved in 4 mL of aqueous solution, and the solution was sonicated for 2 minutes. 66 mg of 1,4-bis(4hydro-1,2,4-triazol-4-yl)benzene (BTAB) was dissolved in 14 mL of DMF solution with sonication for 10 minutes. Then, the two solutions were mixed uniformly, and then 3 mL of triethylamine was added to dissolve by ultrasonic for 15 minutes. Finally, the prepared 21 mL mixture was equally divided into seven 10 mL standard glass vials (3 mL each) and sealed with rubber gasketed caps. The bottle was then left to stand at 130°C for 16 hours. Then the obtained solid was washed twice with a mixed solution of 12M HCl and DMF in a volume ratio of 2:1, and finally washed with acetone three times to obtain PFC-8. The X-ray diffraction pattern is as follows figure 2 (a), the SEM image is shown in Figure 5 (a) and (b).

Embodiment 2

[0076] Example 2 Synthesis of dinitrogen-based metal organic framework (PFC-9)

[0077] Take 1,4-bis(1hydro-pyrazol-4-yl)benzene (H 2 DPB) 105 mg was dissolved in 15 mL of DMF and sonicated for ten minutes. The solution was then placed in a sealed glass bottle and placed in a 90°C oven to preheat to dissolve completely. Then take it out and add 125 mg of nickel acetate tetrahydrate while it is still hot, stir evenly, and then sonicate for 10 minutes. The resulting solution was then transferred into five 10 mL standard glass vials (3 mL each). The vial was placed in an oven at 120°C for 24 hours. The obtained brown solid powder is washed three times with DMF and acetone to obtain PFC-9, and the X-ray diffraction pattern is as follows figure 2 (c).

Embodiment 3

[0078] Example 3 Synthesis of nanoscale triazole-based metal-organic framework (Nano-PFC-8)

[0079] 114 mg of nickel chloride hexahydrate were dissolved in 4 mL of aqueous solution and then sonicated for 2 min. 66 mg of BTAB was dissolved in 14 mL of DMF solution and sonicated for 10 minutes. Then the two solutions were mixed and dissolved by ultrasonic for 15 minutes. Finally, the prepared 18mL mixture was equally divided into six 10mL standard glass vials (each 3mL) and sealed with rubber gasketed caps. The bottle was then left to stand at 120°C for 16 hours. The obtained solid was then washed twice with a mixed solution of 12M HCl and DMF in a volume ratio of 2:1, and finally three times with acetone. The particle size of Nano-PFC-8 nanoscale material is obtained as follows Figure 5 (c, d) show 200 nanometers to 100 micrometers.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The present invention designs and synthesizes a metal-organic framework material constructed based on a ligand containing a heteroaryl (such as triazole or diazole) functional group. The metal-organic frameworks constructed by aryl ligands can be electrically neutral or electropositive, which proves that the cationic framework can improve the stability of MOFs. The organic framework material in the present invention has high specific surface area, permanent pores, and high chemical and thermal stability. In addition, the organic framework material also has the characteristics of mild synthesis conditions and good ion exchange ability, which solves the problems of poor stability and inability to maintain permanent pores in the previous metal-organic framework materials. The material preparation method is simple, the operability is strong, and the particle size of the particles can be freely controlled, and the minimum can reach 200 nanometers. At the same time, it also has good functionality, and after further compounding noble metal precursors, it has an excellent ability to catalyze the production of hydrogen from formic acid.

Description

technical field [0001] The invention belongs to the field of metal-organic framework materials, in particular to a metal-organic framework material based on a heteroaryl functional group ligand and a preparation method and application thereof. Background technique [0002] Metal-organic frameworks (MOFs) are a class of porous frameworks composed of metal nodes and organic ligands. Due to their high porosity, good crystallinity, and structural controllability, they are widely used in materials. The field of chemistry has received extensive attention. However, the coordination bond between metals and ligands has lower bond energy than covalent bonds such as C-C, C-N, C-O, etc., which greatly limits the application range of this type of materials. Therefore, enhancing the binding ability between metals and ligands, that is, the strength of coordination bonds, is one of the most effective ways to improve the stability of MOFs. So far, there are mainly the following strategies ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B01J31/22B01J31/28C01B3/22
CPCC08G83/008B01J31/1691B01J31/28B01J35/0013B01J35/006B01J35/0093C01B3/22B01J2531/847B01J2531/0216
Inventor 刘天赋黄阁
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com