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High-energy barrier dysprosium single-ion magnet as well as preparation method and application thereof

A single-ion, magnet technology, applied in organic chemistry methods, chemical instruments and methods, inductance/transformer/magnet manufacturing and other directions, can solve the problems of low yield, easy decomposition or weathering, instability, etc., and achieves safe and simple process. Good reproducibility and stability

Pending Publication Date: 2022-05-31
JIANGSU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of these high-performance dysprosium-based single-ion magnets often needs to be carried out under extreme conditions of anhydrous and oxygen-free, so it is inconvenient to control the synthesis process, poor reproducibility, and low yield
And some of these materials are unstable at room temperature and air, and are easy to decompose or weather

Method used

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  • High-energy barrier dysprosium single-ion magnet as well as preparation method and application thereof
  • High-energy barrier dysprosium single-ion magnet as well as preparation method and application thereof
  • High-energy barrier dysprosium single-ion magnet as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of high energy barrier dysprosium single ion magnet, comprising: 2,6-bis(bis(2-pyridylmethyl)amino)picoline (BPA-TPA) (1mmol) and DyCl 3 ·6H 2 O (1 mmol) was dissolved in 15 mL of methanol, heated to reflux for 2 h, and a yellow clear solution was obtained. Then sodium trimethylsiliconate (2 mmol) was added, and reflux was continued for 2 h. A very small amount of yellow precipitate appeared, cooled to room temperature, and a small amount of insoluble matter was removed by filtration. , to which NaBPh was added 4 (4mmol), after stirring for 30min, a large amount of pale yellow precipitate was produced, filtered, and the precipitate was dissolved in 5mL of dichloromethane, and then 15mL of n-hexane was slowly added to it, left standstill, and two-phase diffusion was carried out for 2 days to obtain the dysprosium monoion magnet.

[0025] The yield of dysprosium single-molecule magnets prepared in this example was 66.4%.

Embodiment 2

[0027] The preparation method of high energy barrier dysprosium single ion magnet, comprising: 2,6-bis(bis(2-pyridylmethyl)amino)picoline (BPA-TPA) (1.5mmol) and DyCl 3 ·6H 2 O (1 mmol) was dissolved in 20 mL of methanol, heated to reflux for 2 h, and a yellow clear solution was obtained. Then sodium trimethylsiliconate (2.5 mmol) was added, and reflux was continued for 2 h. A very small amount of yellow precipitate appeared, cooled to room temperature, and a small amount of insoluble was removed by filtration. , to which NaBPh was added 4 (4.5mmol), after stirring for 30min, a large amount of pale yellow precipitates were produced, the precipitates were filtered out, dissolved in 8mL of dichloromethane, transferred to a test tube, 20mL of n-hexane was slowly added to it, and allowed to stand for two-phase diffusion for 3 days. That is, the dysprosium single ion magnet is obtained.

[0028] The yield of dysprosium single-molecule magnet prepared in this example was 69.2%.

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Abstract

The invention discloses a high-energy barrier dysprosium single-ion magnet and a preparation method and application thereof, the simple formula of the structure of the single-ion magnet is [Dy (BPA-TPA) (CH3O)] (BPh4) 2. CH2Cl2, and BPA-TPA is 2, 6-bis (bis (2-pyridyl methyl) amino) methylpyridine. Compared with the prior art, the dysprosium single-ion magnet has the following advantages: (1) the dysprosium single-ion magnet can show typical slow relaxation behavior in a zero field, has the characteristics of a single-molecule magnet, has an energy barrier higher than 1600K, and can be used as a molecule-based magnetic material in novel high-density information storage equipment (such as an optical disk, a hard disk and the like); (2) the dysprosium single-ion magnet is not weathered in air and has good stability; and (3) the method is safe and simple in process, high in controllability and good in reproducibility.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and relates to a single-molecule magnet material, in particular to a high-energy barrier dysprosium single-ion magnet and a preparation method and application thereof. Background technique [0002] With the development of information technology, the integration number of electronic devices is required to increase exponentially and the size of the devices is continuously reduced. The continuous development of this integration and miniaturization will be limited by processing technology and cost, resulting in an insurmountable obstacle for modern electronic device integration technology. Therefore, the research and development of molecular-based magnetic materials has become the focus of scientists' attention. Single-molecule magnets (SMMs) are an important field of molecular-based magnetic materials research. Moreover, it has great application potential in the fields of high-density i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C07F5/00H01F1/42H01F41/02
CPCC07F5/003C07F5/027H01F1/42H01F41/02C07B2200/13
Inventor 陈磊程志杰杨亦谋景蓉赵颖娟蔡星伟郑绍军
Owner JIANGSU UNIV OF SCI & TECH
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