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Dysprosium single-molecule magnet and its synthesis method and application

A technology of single-molecule magnets and molecular magnets, applied in the field of dysprosium single-molecule magnets and their synthesis, can solve the problems of inconvenient control of synthesis, easy decomposition or weathering, and poor repeatability, achieving high purity and yield and high controllability , good stability

Active Publication Date: 2022-07-22
JIANGSU UNIV OF SCI & TECH
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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, with 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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  • Dysprosium single-molecule magnet and its synthesis method and application
  • Dysprosium single-molecule magnet and its synthesis method and application
  • Dysprosium single-molecule magnet and its synthesis method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for synthesizing a dysprosium single-molecule magnet, comprising:

[0029] Step 1. Put DyCl 3 ·6H 2 O (1 mmol) and organic ligand Ph 3 PO (4mmol) was stirred and mixed in 10mL of ethanol solution, and allowed to react for 10min;

[0030] Step 2. HOPhCl 2 NO 2 (3mmol) was dissolved in 9mL acetonitrile, triethylamine (4mmol) was added to it, and it was allowed to react for 5min, and then the mixed solution in step 1 was added to produce a pale yellow precipitate;

[0031] Step 3: Dissolve the yellow precipitate in 4 mL of dichloromethane, transfer it to a test tube, slowly drop 10 mL of n-hexane to form a two-phase layer, and obtain a dysprosium monomolecular magnet crystal after 2 days.

[0032] The yield of dysprosium single-molecule magnets prepared in this example was 61.8%.

Embodiment 2

[0034] A method for synthesizing a dysprosium single-molecule magnet, comprising:

[0035] Step 1. Put DyCl 3 ·6H 2 O (1 mmol) and organic ligand Ph 3 PO (4mmol) was stirred and mixed in 10mL of ethanol solution, and allowed to react for 10min;

[0036] Step 2. HOPhCl 2 NO 2 (3mmol) was dissolved in 9mL of acetonitrile, to which was added triethylamine (2mmol), allowed to react for 5min, and then the mixed solution in step 1 was added to produce a yellow precipitate;

[0037] Step 3: Dissolve the yellow precipitate in 5 mL of dichloromethane, transfer it to a test tube, slowly drop in 15 mL of n-hexane to form a two-phase layer, and obtain the dysprosium monomolecular magnet crystal after 2 days.

[0038] The yield of dysprosium single-molecule magnets prepared in this example was 60.4%.

Embodiment 3

[0040] A method for synthesizing a dysprosium single-molecule magnet, comprising:

[0041] Step 1. Put DyCl 3 ·6H 2 O (1 mmol) and organic ligand Ph 3 PO (3mmol) was stirred and mixed in 10mL of ethanol solution, and allowed to react for 10min;

[0042] Step 2. HOPhCl 2 NO 2 (3mmol) was dissolved in 5mL of acetonitrile, triethylamine (1mmol) was added to it, and it was allowed to react for 5min, and then the mixed solution in step 1 was added to produce a pale yellow precipitate;

[0043] Step 3: Dissolve the yellow precipitate in 6 mL of dichloromethane, transfer it to a test tube, slowly drop in 20 mL of n-hexane to form a two-phase layer, and obtain the dysprosium monomolecular magnet crystal after 2 days.

[0044] The yield of dysprosium single-molecule magnets prepared in this example was 60.8%.

[0045] The characterization of the dysprosium single-molecule magnet prepared in this example is as follows:

[0046] (1) Determination of crystal structure

[0047] Sel...

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Abstract

The invention belongs to the technical field of rare-earth metal coordination chemistry, and relates to a dysprosium single-molecule magnet. The structural formula is: Dy(Ph 3 PO) 3 (OPhCl 2 NO 2 ) 3 , where Ph 3 PO is triphenylphosphine oxide, HOPhCl 2 NO 2 is 2,6-dichloro-4-nitrophenol. Its synthetic method comprises: containing 2,6-dichloro-4-nitrophenol (HOPhCl 2 NO 2 ) in the acetonitrile solution, add triethylamine, stir evenly, and then add to the acetonitrile solution containing dysprosium chloride hexahydrate (DyCl 3 ·6H 2 O), triphenylphosphine oxide (Ph 3 Fully reacted in the ethanol solution of PO), and finally the resulting precipitate was dissolved in dichloromethane, n-hexane was slowly added to it, and it was allowed to stand for two-phase diffusion to obtain a six-coordinated dysprosium monomolecular magnet. The preparation process of the invention is safe and simple, has high controllability and good reproducibility, and the prepared complex has good stability, high purity and high yield, and can show typical slow relaxation behavior under the external magnetic field of 0.04T , has the characteristics of single-molecule magnets, and can be used as molecular-based magnetic materials in new high-density information storage devices, such as optical discs and hard disks.

Description

technical field [0001] The invention belongs to the technical field of rare-earth metal coordination chemistry, and relates to a dysprosium single-molecule magnet and a synthesis method and application thereof. Background technique [0002] Magnetic materials are widely used, and their application market exceeds that of semiconductor materials; among them, information storage is one of the largest application fields of magnetic materials. 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. [0003] Single-molecule...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F19/00H01F1/42H01F41/02
CPCC07F19/00H01F1/42H01F41/02
Inventor 陈磊张春洋谭鹏飞蔡星伟袁爱华
Owner JIANGSU UNIV OF SCI & TECH
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