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MOFs material and preparation method thereof

A technology of tetrazolium and rare earth salts, applied in the field of MOFs materials and their preparation

Active Publication Date: 2020-07-28
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is little research on MOFs with antiferromagnetism

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  • MOFs material and preparation method thereof
  • MOFs material and preparation method thereof
  • MOFs material and preparation method thereof

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preparation example Construction

[0035] The present invention also provides a method for preparing the MOFs material described in the above technical solution, which includes the following steps: mixing 5-(1-H-tetrazolium)-isophthalic acid, a cobalt source, a rare earth salt, a strong base and an inorganic solvent Afterwards, a hydrothermal reaction is performed to obtain the MOFs material. In the present invention, mixing 5-(1-H-tetrazolium)-isophthalic acid, a cobalt source, a rare earth salt, a strong base and an inorganic solvent to perform a hydrothermal reaction is to coordinate the organic ligand with the metal ion The process of generating a skeleton structure.

[0036] In the present invention, the 5-(1-H-tetrazolium)-isophthalic acid can provide an organic ligand to play a supporting role, and its chemical formula is H 3 TZI.

[0037] In the present invention, the cobalt source is preferably a divalent cobalt salt, more preferably cobalt nitrate or cobalt sulfate, and more preferably Co(NO 3 ) 2 ·6H 2 O...

Embodiment 1

[0052] Co(NO 3 ) 2 ·6H 2 O(0.1mmol), Gd(NO 3 ) 3 ·6H 2 O (0.1mmol), 5-(1-H-tetrazolium)-isophthalic acid (0.18mmol), sodium hydroxide (0.1mmol) and water (7mL) are mixed evenly (i.e. 5-(1-H- Tetrazolium)-isophthalic acid, cobalt ion in cobalt source, rare earth ion in rare earth salt and OH in strong base - The ratio of the amount of the substance is 9:5:5:5), the hydrothermal reaction is carried out (the temperature of the hydrothermal reaction is 150℃, the time is 72h), and finally the cooling rate is 2.5℃ / hour to 30℃, and then filtered And washing to obtain light yellow block crystals, which are MOFs materials, the chemical formula is Co 3 Gd 4 (TZI) 6 ·9H 2 O, the yield was 78%.

Embodiment 2

[0054] Co(NO 3 ) 2 ·6H 2 O(0.1mmol), Sm(NO 3 ) 3 ·6H 2 O (0.1mmol), 5-(1-H-tetrazolium)-isophthalic acid (0.18mmol), sodium hydroxide (0.1mmol) and water (7mL) are mixed evenly (i.e. 5-(1-H- Tetrazolium)-isophthalic acid, cobalt ion in cobalt source, rare earth ion in rare earth salt and OH in strong base - The ratio of the amount of the substance is 9:5:5:5), the hydrothermal reaction is carried out (the temperature of the hydrothermal reaction is 150°C, the time is 72h), and finally the temperature is cooled to 30°C at a cooling rate of 2.5°C / hour, and filtered And washing to obtain light yellow block crystals, which are MOFs materials, the chemical formula is Co 3 Sm 4 (TZI) 6 ·9H 2 O, the yield was 77%.

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Abstract

The invention provides an MOFs (Metal Organic Frameworks) material. The chemical formula of the MOFs material is Co3RE4(TZI) 6.9H2O, RE comprises at least one of Gd, Sm, Eu, Tb and Dy, and TZI3- in the Co3RE4 (TZI) 6.9H2O is a trivalent anion of 5-(1-H-tetrazole)-isophthalic acid. Co and 4f rare earth metals are used as magnetic center atoms; the MOFs material obtained by taking 5-(1-H-tetrazole)-isophthalic acid as a ligand has a porous structure in a three-dimensional space; an asymmetric unit of the crystal is hourglass-shaped; Co ions and adjacent rare earth metal ions act to spontaneouslymagnetize, electronic magnetic moments are arranged in the same direction, and the spontaneous magnetization intensity of the other asymmetric unit in the same unit cell is equal to that of the former and opposite to that of the former, so that the net magnetic moment of the whole unit cell is zero, and the magnetic moment of the whole crystal is in an ordered state and is anti-ferromagnetic.

Description

Technical field [0001] The invention relates to the technical field of metal-organic framework materials, in particular to a MOFs material and a preparation method thereof. Background technique [0002] Metal-organic frameworks (MOFs) are a class of porous materials constructed from metal-containing nodes (also called secondary structure units or SBU) and organic linkers. Due to the diverse selectivity of the metal nodes of the synthesized MOFs and the modifiability of organic ligands, the structure and function of the synthesized MOFs can be adjusted, making them widely used in the fields of adsorption and separation, luminescence, conductivity, and magnetism. It has become a research in chemistry. One of the fastest growing areas. [0003] Although MOFs materials can be widely used in the magnetic field, they are all due to the ferromagnetism of magnetic MOFs, that is, the magnetic MOFs are released at designated locations, they are easily separated from the complex matrix, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 李荣王超高云陈绪兴窦元鑫
Owner HUBEI UNIV
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