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3d-4f heteronuclear metal magnetic complex and preparing method and application thereof

A 3d-4f, metal complex technology, applied in the recording/reproducing, magnetic recording, instruments and other directions by optical methods, can solve the problems of weak magnetic anisotropy, difficult to improve the energy barrier of single-molecule magnets, etc., to achieve reproduction The effect of good performance, high yield, high thermal stability and phase purity

Inactive Publication Date: 2014-10-15
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, however, researchers have found that 3 d Although transition metal clusters can obtain larger ground state spins, their magnetic anisotropy is often weak, which makes it difficult to increase the energy barrier of single-molecule magnets.

Method used

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  • 3d-4f heteronuclear metal magnetic complex and preparing method and application thereof
  • 3d-4f heteronuclear metal magnetic complex and preparing method and application thereof
  • 3d-4f heteronuclear metal magnetic complex and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 3 with slow relaxation behavior d -4 f Synthesis of heteronuclear metal magnetic complex A:

[0031] m-Toluic acid (0.25 mmol, 34.0 mg), o-phenanthroline (0.1 mmol, 19.8 mg) and dysprosium acetate hexahydrate (0.2 mmol, 82.3 mg) and nickel nitrate hexahydrate (0.1 mmol, 29.1 mg) was dissolved in double-distilled water (6.0 mL) and methanol (4.0 mL), and the pH of the solution was adjusted to 5 with solid sodium hydroxide, stirred for several minutes, and sealed in a hydrothermal kettle. After being incubated at 140°C for three days, at 3.0°C·h –1 The rate program cooled down to room temperature to obtain green blocky crystals, which were then washed with twice distilled water and dried in air.

Embodiment 2

[0033] 3 with slow relaxation behavior d -4 f Synthesis of heteronuclear metal magnetic complex B:

[0034] m-Toluic acid (0.2 mmol, 27.2 mg), o-phenanthroline (0.1 mmol, 19.8 mg) and dysprosium acetate hexahydrate (0.2 mmol, 82.3 mg) and ferrous sulfate heptahydrate (0.1 mmol , 27.8 mg) was dissolved in twice distilled water (6.0 mL) and methanol (4.0 mL), and the pH of the solution was adjusted to 5 with solid sodium hydroxide, and sealed in a hydrothermal kettle after stirring for several minutes. After being incubated at 160°C for three days, at 3.0°C·h –1 The rate program cooled down to room temperature to obtain red blocky crystals, which were then washed with twice distilled water and dried in air.

Embodiment 3

[0036] 3 with slow relaxation behavior d -4 f Synthesis of heteronuclear metal magnetic complex C:

[0037] m-Toluic acid (0.2 mmol, 27.2 mg), o-phenanthroline (0.1 mmol, 19.8 mg) and dysprosium acetate hexahydrate (0.25 mmol, 102.9 mg) and copper nitrate trihydrate (0.1 mmol, 24.1 mg) was dissolved in double-distilled water (4.0 mL) and methanol (6.0 mL), and the pH of the solution was adjusted to 4 with solid sodium hydroxide, stirred for several minutes, and then sealed in a hydrothermal kettle. After being incubated at 120°C for three days, at 3.0°C·h –1 The rate program cooled down to room temperature to obtain blue blocky crystals, which were then washed with twice distilled water and dried in air.

[0038] (Example 1-3, A-C) prepared by the present invention has slow relaxation behavior 3 d -4 f The structural characterization of the heteronuclear metal magnetic complex is as follows:

[0039] (1) Crystal structure determination ( figure 1 )

[0040] Select a s...

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Abstract

The invention relates to a 3d-4f heteronuclear metal magnetic complex with slow relaxation effect and a preparing method and application thereof. The chemical general formula of the complex is [DyM(H2O)(phen)(L)5], wherein M is a transitional metal ion Ni (II), Fe (II) or Cu (II); phen is phenanthroline; L is m-Toluic acid monovalent anion; a solvothermal method is adopted to prepare the complex, the productivity is higher and the reproducibility is good; the results of a magnetic test show that the AC magnetic susceptibility of the complex in the low-temperature space presents remarkable frequency dependence, that is, the slow magnetic effect of relaxation, therefore, the heteronuclear metal magnetic complex can be used as molecule-based magnetic materials in the high-density information storage equipment and the like and the application value is great.

Description

[0001] Statement Regarding Funding Research or Development [0002] The application for this invention has been funded by the National Natural Science Foundation of China (fund numbers: 21171129 and 21173157) and the Tianjin Higher Education Science and Technology Development Fund Project (fund number: 2012ZD01). technical field [0003] The invention relates to the technical field of metal-organic coordination compounds and their molecular-based magnetic materials, especially 3 with slow relaxation behavior d -4 f The preparation method and application of the heteronuclear metal magnetic complex, whose magnetic properties make it widely used as a molecular-based magnetic material in the field of material science. Background technique [0004] In recent years, with the continuous development of magnetic materials and magnetic theory, the research on molecular-based magnetic materials with special functions, that is, molecular-based magnets, has increasingly become the focus...

Claims

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Application Information

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IPC IPC(8): C07F19/00G11B5/62G11B7/241
Inventor 赵小军杨恩翠李言余佳纹
Owner TIANJIN NORMAL UNIVERSITY
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