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Dy (III)-Cu (II) eutectic monomolecular magnet and preparation method thereof

A single-molecule magnet and a technology for molecular magnets are applied in the field of Dy-Cu eutectic single-molecule magnets and their preparation, and achieve the effects of high yield, broad application prospects and simple process.

Active Publication Date: 2020-05-08
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the true eutectic of metal coordination compounds, that is, the eutectic molecules are only composed of metal complexes as reactants has not been reported in the literature.

Method used

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  • Dy (III)-Cu (II) eutectic monomolecular magnet and preparation method thereof
  • Dy (III)-Cu (II) eutectic monomolecular magnet and preparation method thereof
  • Dy (III)-Cu (II) eutectic monomolecular magnet and preparation method thereof

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Experimental program
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Embodiment 1

[0024] The preparation method of the Dy(III)-Cu(II) eutectic single-molecule magnet in this embodiment, the steps are as follows:

[0025] (1) Add 0.1 mmol of Dy(hfac) 3 (H 2 O) 2 Dissolve in 10 mL of methanol and stir for 25 minutes;

[0026] (2) Add 0.1 mmol of Cu(acac) 2 Dissolve in 15 mL of dichloromethane and stir for 10 minutes;

[0027] (3) Dy(hfac) will be dissolved 3 (H 2 O) 2 The methanol solution was added to the dissolved Cu(acac) 2 In dichloromethane solution, continue to stir at room temperature for 15 minutes, then filter, the resulting clear solution volatilizes naturally, after 3 days, dark green crystals are obtained, filter, wash with a small amount of methanol, and dry at room temperature to obtain Dy(III)-Cu(II) Eutectic molecular material with a calculated yield of 92% (calculated as Dy).

[0028] Perkin-Elmer 2400 elemental analyzer was used to analyze the content of C and H in the Dy(III)-Cu(II) eutectic molecular material, according to the mol...

Embodiment 2

[0034] The Dy(III)-Cu(II) eutectic single-molecule magnet [Dy(hfac) 3 (H 2 O) 2 ]-[Cu(acac) 2 ] The preparation method, the steps are as follows:

[0035] (1) Dy(hfac) 3 (H 2 O) 2 Dissolve in methanol and stir for 20 minutes to obtain Dy(hfac) with a concentration of 0.007 mol / L 3 (H 2 O) 2 methanol solution;

[0036] (2) Add Cu(acac) 2 Dissolved in dichloromethane, stirred for 15 minutes to obtain Cu(acac) with a concentration of 0.005 mol / L 2的 Dichloromethane solution;

[0037] (3) According to the volume ratio = 15:18, Dy(hfac) will be dissolved 3 (H 2 O) 2 The methanol solution was added to the dissolved Cu(acac) 2 In dichloromethane solution, continue to stir at room temperature for 20 minutes, filter, the resulting clear solution volatilizes naturally, after 3 days, dark green crystals are obtained, filter, wash with a small amount of methanol, and dry at room temperature to obtain Dy(III)-Cu(II) Eutectic molecular magnets.

Embodiment 3

[0039] The Dy(III)-Cu(II) eutectic single-molecule magnet [Dy(hfac) 3 (H 2 O) 2 ]-[Cu(acac) 2 ] The preparation method, the steps are as follows:

[0040] (1) Dy(hfac) 3 (H 2 O) 2 Dissolve in methanol and stir for 30 minutes to obtain Dy(hfac) with a concentration of 0.008 mol / L 3 (H 2 O) 2 methanol solution;

[0041] (2) Add Cu(acac) 2 Dissolve in dichloromethane and stir for 12 minutes to obtain Cu(acac) with a concentration of 0.006 mol / L 2的 Dichloromethane solution;

[0042] (3) According to the volume ratio = 15:20, Dy(hfac) will be dissolved 3 (H 2 O) 2 The methanol solution was added to the dissolved Cu(acac) 2 In dichloromethane solution, continue to stir at room temperature for 18 minutes, filter, the resulting clear solution volatilizes naturally, after 3 days, dark green crystals are obtained, filter, wash with a small amount of methanol, and dry at room temperature to obtain Dy(III)-Cu(II) Eutectic molecular magnets.

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Abstract

The invention discloses a Dy (III)-Cu (II) eutectic monomolecular magnet and a preparation method thereof. The chemical formula of the Dy (III)-Cu (II) eutectic monomolecular magnet is [Dy(hfac)3(H2O)2]-[Cu(acac)2], wherein hfac is a hexafluoroacetylacetone anion, and acac is an acetylacetone anion. The preparation method comprises the following steps: adding a methanol solution dissolved with Dy(hfac)3(H2O)2 into a dichloromethane solution dissolved with Cu(acac)2, performing room-temperature stirring for 15-20 min, filtering to obtain a clear solution, naturally volatilizing the clear solution for 3 d to obtain dark green crystals, filtering, and washing and drying the dark green crystals to obtain the Dy (III)-Cu (II) eutectic monomolecular magnet. The Dy (III)-Cu (II) eutectic molecular material has the performance of a single-molecule magnet, and has a wide application prospect in the aspects of high-density information storage equipment, quantum chemical calculation, spintronicsand the like as a molecular-based magnetic material.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of molecular-based magnetic materials, and in particular relates to a Dy(III)-Cu(II) eutectic single-molecule magnet and a preparation method thereof. Background technique [0002] Single-molecule magnets are composed of independent single molecules that have almost no interaction in the magnetic sense. Each molecule can be regarded as a magnetic unit. At the blocking temperature T B The following exhibit superparamagnetic behavior. Single-molecule magnets have the characteristics of magnetic bistability, and can exhibit the hysteresis and slow magnetic relaxation behavior of traditional macroscopic magnets, so they have potential applications in ultra-high-density information storage, quantum computing, and molecular spintronics. ; On the other hand, single-molecule magnets usually exhibit the quantum tunneling effect (QTM effect) of microscopic particles at low temperature,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/92C07C45/77C07C45/81H01F1/42
CPCC07C49/92H01F1/42C07B2200/13
Inventor 李郤里周立明王爱玲崔明会
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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