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Mononuclear dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline as a ligand and its preparation method and application

A technology of hydroxyquinoline and complexes, which is applied in the field of magnetic materials, and achieves the effects of low cost, simple preparation method and good repeatability

Active Publication Date: 2019-03-12
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] With the in-depth study of the relaxation mechanism of single-molecule magnets by scientific researchers and the rapid development of characterization technology, more and more rare-earth single-molecule magnets with practical value have been synthesized, but no chemical formula [ Dy(C 10 h 6 NOBr 2 ) 3 (H 2 O)] related reports on magnetic materials

Method used

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  • Mononuclear dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline as a ligand and its preparation method and application
  • Mononuclear dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline as a ligand and its preparation method and application
  • Mononuclear dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline as a ligand and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 45 mg (about 0.2 mmol) ligand 2-methyl-5,7-dibromo-8-hydroxyquinoline and 46 mg (about 0.1 mmol) Dy(NO 3 ) 3 ·6H 2 Add O to a Pyrex tube with one end closed and about 18 cm in length, add 2 mL of CHCl 3 and H 2 A mixed solvent composed of O (CHCl 3 and H 2 The volume ratio of O is 1:1), add 2 drops of triethylamine dropwise (at this time the pH value of the solution is 7.2), vacuumize the Pyrex tube, and seal the other end. Place the sealed Pyrex tube at 80°C for 72 hours of heat preservation, take it out, and cool it down to room temperature naturally. Yellow strip crystals can be observed at the bottom of the Pyrex tube. Yield 62%.

[0033] Characterize the product obtained above:

[0034] 1) Crystal structure analysis:

[0035]The yellow strip crystal with perfect surface structure was measured by single crystal diffraction to determine its crystal structure. The obtained crystal structure data is shown in the aforementioned Table 1, and the bond length and b...

Embodiment 2

[0049] Repeat Example 1, the difference is: CHCl in the mixed solvent 3 and H 2 The volume ratio of O was changed to 1:1, and the amount of mixed solvent added was 1 mL.

[0050] After the Pyrex tube was taken out and naturally cooled to room temperature, yellow strip crystals were precipitated at the bottom of the Pyrex tube. Yield 65%.

[0051] Structural characterization of the resulting product was determined to be the target complex [Dy(L) 3 (H 2 O)]. Characterization of the magnetic properties of the obtained product shows that the obtained product exhibits slow relaxation magnetic behavior at low temperature.

Embodiment 3

[0053] Repeat Example 1, the difference is: CHCl in the mixed solvent 3 and H 2 The volume ratio of O was changed to 2:1.

[0054] After the Pyrex tube was taken out and naturally cooled to room temperature, yellow strip crystals were precipitated at the bottom of the Pyrex tube. Yield 60%.

[0055] Structural characterization of the resulting product was determined to be the target complex [Dy(L) 3 (H 2 O)]. Characterization of the magnetic properties of the obtained product shows that the obtained product exhibits slow relaxation magnetic behavior at low temperature.

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Abstract

The invention discloses a single-core dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline serving as a ligand as well as a preparation method and application of the single-core dysprosium complex. The complex has a chemical formula of [Dy(L)3(H2O)], wherein L is 2-methyl-5,7-dibromo-8-hydroxyquinoline with hydrogen atoms of hydroxyl being removed and is charged with a unit of negative charge. The complex belongs to a monoclinic system with C2 / c space groups. The preparation method of the complex disclosed by the invention comprises the following steps: taking Dy(NO3)3.6H2O and 2-methyl-5,7-dibromo-8-hydroxyquinoline, dissolving with a mixed solvent, regulating the pH value of the obtained solution to be 6.5-7.8, reacting the obtained mixed solution under heating conditions, thereby obtaining the product, wherein the mixed solvent refers to a combination of chloroform or deuterated chloroform and water. The complex provided by the invention is simple in preparation method, low in cost and high in repeatability, presents a slow relaxation magnetic behavior at low temperature and can be used for preparing magnetic materials.

Description

technical field [0001] The invention relates to a mononuclear dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline as a ligand, a preparation method and application thereof, and belongs to the technical field of magnetic materials. Background technique [0002] Due to the special structure, single-molecule magnets exhibit unique magnetic phenomena such as slow relaxation, quantum tunneling, and quantum interference effects, which make them have potential application prospects in quantum computers and ultra-high-density information storage materials. [0003] With the in-depth study of the relaxation mechanism of single-molecule magnets by scientific researchers and the rapid development of characterization technology, more and more rare-earth single-molecule magnets with practical value have been synthesized, but no chemical formula [ Dy(C 10 h 6 NOBr 2 ) 3 (H 2 O)] related reports on magnetic materials. Contents of the invention [0004] The technical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00H01F1/42
CPCC07F5/003H01F1/42
Inventor 邹华红陈琦梁福沛
Owner GUANGXI NORMAL UNIV
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