A kind of 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: 2021-12-03
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is little research on MOFs with antiferromagnetism

Method used

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  • A kind of mofs material and preparation method thereof
  • A kind of mofs material and preparation method thereof
  • A kind of mofs material and preparation method thereof

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[0035] The present invention also provides the preparation method of the MOFs material according to the above technical solution, comprising the following steps: mixing 5-(1-H-tetrazolium)-isophthalic acid, cobalt source, rare earth salt, strong base and inorganic solvent Then, a hydrothermal reaction is performed to obtain the MOFs material. In the present invention, the hydrothermal reaction is carried out after mixing 5-(1-H-tetrazolium)-isophthalic acid, cobalt source, rare earth salt, strong base and inorganic solvent to coordinate organic ligands and metal ions The process of generating a skeleton structure.

[0036] In the present invention, the 5-(1-H-tetrazolium)-isophthalic acid can provide organic ligands and 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, more preferably Co(NO 3 ) 2 ·6H 2 O. In the present i...

Embodiment 1

[0052] The Co(NO 3 ) 2 ·6H 2 O(0.1mmol), Gd(NO 3 ) 3 ·6H 2 O (0.1 mmol), 5-(1-H-tetrazolium)-isophthalic acid (0.18 mmol), sodium hydroxide (0.1 mmol) and water (7 mL) were mixed well (ie 5-(1-H- tetrazolium)-isophthalic acid, cobalt ions in cobalt sources, rare earth ions in rare earth salts, and OH in strong bases - The ratio of the amount of the substances is 9:5:5:5), conduct a hydrothermal reaction (the temperature of the hydrothermal reaction is 150°C, and the time is 72h), and finally cool to 30°C at a cooling rate of 2.5°C / hour, filter and washing to obtain light yellow bulk crystals, which are MOFs materials, the chemical formula is Co 3 Gd 4 (TZI) 6 ·9H 2 O, yield 78%.

Embodiment 2

[0054] The Co(NO 3 ) 2 ·6H 2 O(0.1mmol), Sm(NO 3 ) 3 ·6H 2 O (0.1 mmol), 5-(1-H-tetrazolium)-isophthalic acid (0.18 mmol), sodium hydroxide (0.1 mmol) and water (7 mL) were mixed well (ie 5-(1-H- tetrazolium)-isophthalic acid, cobalt ions in cobalt sources, rare earth ions in rare earth salts, and OH in strong bases - The ratio of the amount of the substances is 9:5:5:5), conduct a hydrothermal reaction (the temperature of the hydrothermal reaction is 150°C, and the time is 72h), and finally cool to 30°C at a cooling rate of 2.5°C / hour, filter and washing to obtain light yellow bulk crystals, which are MOFs materials, the chemical formula is Co 3 Sm 4 (TZI) 6 ·9H 2 O, yield 77%.

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Abstract

The invention provides a MOFs material, the chemical formula of the MOFs material is Co 3 RE 4 (TZI) 6 9H 2 O, the RE includes at least one of Gd, Sm, Eu, Tb and Dy, and the Co 3 RE 4 (TZI) 6 9H 2 TZI in O 3‑ It is the trivalent anion of 5‑(1‑H‑tetrazolium)‑isophthalic acid. In the present invention, Co and 4f rare earth metals are used as magnetic central atoms, and 5-(1-H-tetrazolium)-isophthalic acid is used as a ligand to obtain the MOFs material in three-dimensional space. The symmetrical unit is "hourglass-shaped", the Co ion interacts with the adjacent rare earth metal ion to spontaneously magnetize, and the electronic magnetic moments are arranged in the same direction, while the spontaneous magnetization of the other asymmetric unit in the same unit cell is equal to the former, and the direction On the contrary, the net magnetic moment of the entire unit cell is zero, and the entire crystal magnetic moment is in an ordered state, which is antiferromagnetic.

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 known as secondary structural units or SBUs) and organic linkers. Due to the diverse selectivity of metal nodes in the synthesis of MOFs and the modifiability of organic ligands, the structure and function of the synthesized MOFs can be tunable, making them widely used in the fields of adsorption and separation, luminescence, conductivity, and magnetism. One of the fastest growing fields. [0003] Although MOFs materials can be widely used in the field of magnetism, they are all due to the ferromagnetism of magnetic MOFs, that is, the magnetic MOFs are released in a designated position, which is easy to separate from the complex matrix, and can be localized and colle...

Claims

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Application Information

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Patent Type & Authority Patents(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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