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Dysprosium complex constructed with 8-hydroxyquinoline acylhydrazone derivative as ligand, and synthesis method and application of same

A technology of hydroxyquinoline acylhydrazone and a synthetic method, which is applied in the field of magnetic materials, can solve problems such as the lack of a unified explanation of the magnetic action mechanism of single-molecule magnets, and achieve the effects of simple synthesis method, low cost, and good repeatability

Active Publication Date: 2017-08-29
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the relevant research has made great progress, there is still no unified explanation for the magnetic mechanism of single-molecule magnets, and the relationship between the structure and magnetism of single-molecule magnets is still the mainstream in the field of single-molecule magnet research at this stage.
With the rapid development of information technology, scientists have put forward higher requirements for the research of nano-magnetic materials and their performance parameters, and more and more magnetic materials with practical value have been synthesized, but there are no such materials. The molecular formula of 8-hydroxyquinoline acylhydrazone derivatives as ligands is C 34 h 27 DyN 6 o 6 Related reports on Dysprosium complexes

Method used

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  • Dysprosium complex constructed with 8-hydroxyquinoline acylhydrazone derivative as ligand, and synthesis method and application of same
  • Dysprosium complex constructed with 8-hydroxyquinoline acylhydrazone derivative as ligand, and synthesis method and application of same
  • Dysprosium complex constructed with 8-hydroxyquinoline acylhydrazone derivative as ligand, and synthesis method and application of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take the ligand 2-formyl-8-hydroxyquinoline benzoylhydrazone (0.025mmol, 7.3mg) and Dy(NO 3 ) 3 ·6H 2 O (0.025mmol, 11.4mg), was added to a Pyrex tube with a length of about 18cm that was closed at one end, and 0.6mL of CH 3 OH and 0.6mLH 2 O, add 2 drops of triethylamine dropwise, shake gently (the pH of the solution at this time = 7.8), seal the other end of the tube under the condition of vacuuming, and then keep it at 80°C for 72 hours, take it out, and use Cotton wool wrapped the Pyrex tube tightly and let it cool down to room temperature slowly, and deep red strip crystals were precipitated, with a yield of about 25% (calculated by Dy). Elemental analysis (%) (C 34 h 27 DyN 6 o 6 ), experimental value: C, 52.42, H, 3.62, N, 10.81; theoretical value: C, 52.48, H, 3.50, N, 10.80.

[0040] The product obtained in Example 1 is characterized:

[0041] 1) Infrared characterization:

[0042] Use American Nicolet 360FT-IR type Fourier transform infrared spectrom...

Embodiment 2

[0062] Repeat Example 1, the difference is:

[0063] 1) The ratio of methanol and water in the mixed solvent is 2:1, and the total amount of the mixed solvent remains unchanged;

[0064] 3) Adjust the pH value of the solution to 7.9.

[0065] Take out the Pyrex tube, wrap the Pyrex tube tightly with cotton wool and let it cool down to room temperature slowly, deep red strip crystals are precipitated at the bottom of the Pyrex tube. Yield 27%.

[0066] Structural characterization of the obtained product was carried out, and the product was determined to be the target product [Dy(HL)(L)]·2H 2 O, where L is 2-formyl-8-hydroxyquinoline benzoylhydrazone deprived of a hydroxyl hydrogen atom and a hydrogen atom on the acylhydrazone nitrogen, with two units of negative charge, HL is 2-formyl-8 -Hydroxyquinoline benzoyl hydrazone removes the hydrogen atom of the hydroxyl group, with a unit of negative charge. Characterization of the magnetic properties of the obtained product shows...

Embodiment 3

[0068] Repeat Example 1, the difference is:

[0069] 1) The ratio of methanol and water in the mixed solvent is 1:3, and the total amount of the mixed solvent remains unchanged;

[0070] 2) adjust the pH value of the solution to 8.0;

[0071] 3) Change the reaction temperature to 60°C and the reaction time to 80h.

[0072] Take out the Pyrex tube, wrap the Pyrex tube tightly with cotton wool and let it cool down to room temperature slowly, deep red strip crystals are precipitated at the bottom of the Pyrex tube. Yield 26%.

[0073] Structural characterization of the obtained product was carried out, and the product was determined to be the target product [Dy(HL)(L)]·2H 2O, where L is 2-formyl-8-hydroxyquinoline benzoylhydrazone deprived of a hydroxyl hydrogen atom and a hydrogen atom on the acylhydrazone nitrogen, with two units of negative charge, HL is 2-formyl-8 -Hydroxyquinoline benzoyl hydrazone removes the hydrogen atom of the hydroxyl group, with a unit of negative ...

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Abstract

The invention discloses a dysprosium complex constructed with a 8-hydroxyquinoline acylhydrazone derivative as a ligand, and a synthesis method and an application of same. The chemical formula of the complex is [Dy(HL)(L)].2H2O, wherein the L refers to 2-formyl-8-hydroxyquinoline benzoylhydrazone with a hydrogen atom on a hydroxyl group and a hydrogen atom on acylhydrazone nitrogen eliminated and with two units of negative charges; and the HL refers to 2-formyl-8-hydroxyquinoline benzoylhydrazone with a hydrogen atom on a hydroxyl group eliminated and with one unit of negative charge. The synthesis method of the complex includes the steps of: dissolving Dy(NO3)3.6H2O and the 2-formyl-8-hydroxyquinoline benzoylhydrazone in a mixed solvent, regulating the pH of the solution to 7.5-8.1; carrying out a reaction to the mixed solution under a heating condition, cooling a reaction product until a crystal is separated out to obtain the product, wherein the mixed solvent is a composition of methanol / water. The complex, at low temperature, shows a field-induced slow-relaxation magnetic behavior.

Description

technical field [0001] The invention relates to a dysprosium complex constructed with 8-hydroxyquinoline acylhydrazone derivatives as a ligand, a synthesis method and application thereof, and belongs to the technical field of magnetic materials. Background technique [0002] In recent years, with the rapid development of quantum computing and information technology revolution, nanomagnetic materials have attracted more and more attention from chemical researchers. Originating from the potential application of single-molecule magnets in high-density information processing and storage, quantum computers, and molecular spintronics, the design and synthesis of single-molecule magnets has become the focus of physics, chemistry, and materials science in the past two decades. research object. Among them, rare earth-based single-molecule magnets have become a research hotspot in the field of single-molecule magnets because of the relatively large number of single electrons and sign...

Claims

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Application Information

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IPC IPC(8): C07F5/00C07D215/26H01F1/42
CPCC07B2200/13C07D215/26C07F5/003H01F1/42
Inventor 邹华红黎玲玲梁福沛
Owner GUANGXI NORMAL UNIV
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