Mononuclear dysprosium magnetic complex as well as preparation method and application thereof
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A complex, mononuclear technology, applied in the fields of organic chemistry methods, chemical instruments and methods, and magnetism of organic materials/organic magnetic materials, etc. High purity and yield, high controllability and good stability
Pending Publication Date: 2021-02-09
JIANGSU UNIV OF SCI & TECH
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However, the synthesis of these high-performance dysprosium-based single-ion magnets often needs to be carried out under the extreme conditions of anhydrous and oxygen-free, so it is incon
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Embodiment 1
[0027] The synthetic method of mononuclear dysprosium magnetic complex comprises the following steps:
[0028] Step 1, DyCl 3 ·6H 2 O (0.2mmol) and organic ligand TPA (0.2mmol) were stirred and mixed in 4mL of anhydrous methanol solution, and allowed to react for 10min;
[0029] Step two, HOPhCl 2 NO 2 (0.4mmol) was dissolved in 12mL of acetonitrile, triethylamine (0.8mmol) was added thereto, allowed to react for 5min, and then the mixed solution in step 1 was added to produce a yellow precipitate;
[0030] Step 3: Dissolve the yellow precipitate in step 2 in 4 mL of dichloromethane, transfer it to a test tube, slowly drop in 10 mL of n-hexane to form a two-phase layer, and let it stand for 2 days to obtain the crystal of the mononuclear dysprosium-based magnetic complex.
[0031] The yield of the mononuclear dysprosium magnetic complex prepared in this example was 57.8%.
Embodiment 2
[0033] The synthetic method of mononuclear dysprosium magnetic complex comprises the following steps:
[0034] Step 1, DyCl 3 ·6H 2 O (0.2mmol) and organic ligand TPA (0.2mmol) were stirred and mixed in 6mL absolute ethanol solution, and allowed to react for 10min;
[0035] Step two, HOPhCl 2 NO 2 (0.4mmol) was dissolved in 5mL acetonitrile, triethylamine (0.6mmol) was added thereto, allowed to react for 5min, and then the mixed solution in step 1 was added to produce a yellow precipitate;
[0036] Step 3. Dissolve the yellow precipitate in step 2 in 5 mL of dichloromethane, transfer it to a test tube, slowly drop in 15 mL of n-hexane to form two-phase separation, and obtain the crystal of the mononuclear dysprosium-based magnetic complex after 2 days.
[0037] The yield of the mononuclear dysprosium magnetic complex prepared in this example was 58.4%.
[0038] The characterization of the mononuclear dysprosium magnetic complex prepared in this example is as follows:
[...
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Abstract
The invention belongs to the technical field of rare earth metal coordination chemistry, and relates to a mononuclear dysprosium magnetic complex with a simple structural formula of Dy(TPA)(OPhCl2NO2)3, wherein TPA is tris(2-pyridylmethyl)amine, and HOPhCl2NO2 is 2, 6-dichloro-4-nitrophenol. The preparation method comprises the following steps: adding triethylamine into an acetonitrile solution containing 2, 6-dichloro-4-nitrophenol (HOPhCl2NO2), performing uniform stirring, adding the mixture into anhydrous alcohol containing dysprosium chloride hexahydrate (DyCl3.6H2O) and TPA, performing full reacting, completely dissolving the generated yellow precipitate into dichloromethane, slowly adding n-hexane, standing, and carrying out two-phase diffusion to obtain the seven-coordination mononuclear dysprosium complex. The preparation process is safe, simple, high in controllability and good in reproducibility, and the prepared complex is good in stability and high in purity and yield. Typical slow relaxation behaviors can be shown under an external magnetic field of 0.15 T, and the magnetic material has the characteristics of a single-molecule magnet and can be used as a molecular-based magnetic material in novel high-density information storage equipment (such as an optical disk and a hard disk).
Description
technical field [0001] The invention belongs to the technical field of rare earth metal coordination chemistry, and relates to a mononuclear dysprosium magnetic complex and a preparation method and application thereof. Background technique [0002] With the development of information technology, people demand that the number of integrated electronic devices increases exponentially while the size of the devices decreases continuously. The continuous development of this integration and miniaturization is limited by the processing technology and cost, which creates an insurmountable obstacle for the integration technology of modern electronic devices. A single-molecule magnet is a molecular magnet with a nanometer size in the true sense. Compared with traditional magnetic materials, each molecule of a single-molecule magnet is an isolated "magnetic domain". Therefore, the single-molecule magnet has a tiny size, which breaks through the size-constrained problem of traditional m...
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