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Rare earth based molecular magnet constructed by taking alkylol amine Schiff base generated in situ as ligand and preparation method of rare earth based molecular magnet

A technology of alkanolamine Schiff base and molecular magnet, which is applied in chemical instruments and methods, inductance/transformer/magnet manufacturing, organic material/organic magnetic material magnetism, etc., can solve the problem that there are not many rare earth-based molecular magnets, and achieve Low cost of raw materials, high yield and good repeatability

Inactive Publication Date: 2015-09-30
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are not many examples of rare earth-based molecular magnets based on in-situ generated alkanolamine Schiff base ligands, and no chemical formula [Dy 10 (L 2 ) 4 (HL 2 ) 2 (μ 5 -NO 3 ) 2 (CH 3 COO) 12 ]·8H 2 Related reports on rare earth magnetic materials of O

Method used

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  • Rare earth based molecular magnet constructed by taking alkylol amine Schiff base generated in situ as ligand and preparation method of rare earth based molecular magnet
  • Rare earth based molecular magnet constructed by taking alkylol amine Schiff base generated in situ as ligand and preparation method of rare earth based molecular magnet
  • Rare earth based molecular magnet constructed by taking alkylol amine Schiff base generated in situ as ligand and preparation method of rare earth based molecular magnet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The rare earth-based molecular magnet [Dy 10 (L) 4 (HL) 2 (μ 5 -NO 3 ) 2 (CH 3 COO) 12 ]·8H 2 O, where L stands for 3-[(2-hydroxy-3-ethoxy)-benzylideneamino]-1,2-propanediol with three hydroxyl hydrogen atoms removed and three units of negative charge; HL stands for 3-[(2-Hydroxy-3-ethoxy)-benzylideneamino]-1,2-propanediol has lost two hydroxyl hydrogen atoms and has two units of negative charge.

[0033] The rare earth-based molecular magnet [Dy 10 (L) 4 (HL) 2 (μ 5 -NO 3 ) 2 (CH 3 COO) 12 ]·8H 2 The preparation method of O is:

[0034] Weigh the analytically pure Dy(NO 3 ) 3 ·6H 2 O, Dy(CH 3 COO) 3 ·6H 2 O, 3-ethoxy-2-hydroxybenzaldehyde and 3-amino-1,2-propanediol (where Dy(NO 3 ) 3 ·6H 2 O is 0.05mmol, namely 0.0228g, Dy(CH 3 COO) 3 ·6H 2 O is 0.05mmol, i.e. 0.0248g), placed in a beaker, then added a mixed solvent consisting of 1.0mL of anhydrous methanol and 1.0mL of acetonitrile, dissolved, shaken up, and then adjusted the resulting so...

Embodiment 2

[0044] Repeat Example 1, except that:

[0045] 1) Dy(NO 3 ) 3 ·6H 2 O and Dy(CH 3 COO) 3 ·6H 2 The amount of O was changed to 0.1mmol, that is, 0.0456g and 0.0496g were weighed respectively;

[0046] 2) Change the mixed solvent to consist of 2.0mL absolute ethanol and 1.0mL acetonitrile;

[0047] 3) adjust the pH value of the solution to 7.8;

[0048] 4) The reaction temperature is controlled at 100°C, and the reaction time is controlled at 52h.

[0049] The single crystal structure of the obtained product was characterized and analyzed, and the target product was determined to be a molecular magnet [Dy 10 (L) 4 (HL) 2 (μ 5 -NO 3 )2 (CH 3 COO) 12 ]·8H 2 O, the characterization of the magnetic properties of the product shows that the obtained magnetic material is χ at room temperature M T is 137.5cm 3 Kmol -1 , as the temperature decreases, χ M T gradually decreases, and after 12K, it drops sharply to 2K and reaches the minimum value of 81.6cm 3 Kmol -1 . ...

Embodiment 3

[0051] Example 1 was repeated, except that the pH of the solution was adjusted to 7.2.

[0052] The single crystal structure of the obtained product was characterized and analyzed, and the target product was determined to be a molecular magnet [Dy 10 (L) 4 (HL) 2 (μ 5 -NO 3 ) 2 (CH 3 COO) 12 ]·8H 2 O, the characterization of the magnetic properties of the product shows that the obtained magnetic material is χ at room temperature M T is 137.5cm 3 Kmol -1 , as the temperature decreases, χ M T gradually decreases, and after 12K, it drops sharply to 2K and reaches the minimum value of 81.6cm 3 Kmol -1 . The high temperature part is dominated by the induction effect of temperature on the molar magnetic susceptibility, and the low temperature part is related to the magnetic anisotropy of dysprosium ions in the cluster and the weak antiferromagnetic coupling. Under the joint influence of spin-orbit coupling and electronic interaction, the 4f of dysprosium ions Electroni...

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Abstract

The invention discloses a rare earth based molecular magnet constructed by taking alkylol amine Schiff base generated in situ as a ligand and a preparation method of the rare earth based molecular magnet. The chemical formula of the rare earth based molecular magnet is [Dy10(L)4(HL)2([mu]5-NO3)2(CH3COO)12].8H2O, wherein the L represents that three hydroxyl hydrogen atoms are removed from 3-[(2-hydroxyl-3-oxethyl)-benzylideneamino]-1, 2-propylene glycol; the HL represents that two hydroxyl hydrogen atoms are removed from 3-[(2-hydroxyl-3-oxethyl)-benzylideneamino]-1, 2-propylene glycol. The preparation method of the rare earth based molecular magnet comprises the following steps: taking Dy(NO3)3.6H2O, Dy(CH3COO)3.6H2O, 3-oxethyl-2-hydroxy benzaldehyde and 3-amino-1, 2-propylene glycol, dissolving the materials by using a mixed solvent, adjusting the pH value, carrying out liquid nitrogen refrigeration, vacuumizing, fusion-sealing, and carrying out the heating reaction, so as to obtain the rare earth based molecular magnet. The molecular magnet provided by the invention is integrally paramagnetic.

Description

technical field [0001] The invention relates to a rare-earth-based molecular magnet constructed with an alcoholamine Schiff base generated in situ as a ligand and a preparation method thereof, belonging to the technical field of molecular magnetic materials. Background technique [0002] Schiff base organic ligands, because they contain dynamic covalent bonds such as imine bonds, are chemical bonds stronger than weak interactions such as electrostatic and hydrogen bonds, and the assembled compounds have better stability. Moreover, compared with ordinary covalent bonds, the reaction conditions for forming Schiff base bonds are mild, without by-products, and without destroying the structure of the assembly. Therefore, Schiff bases are easy to synthesize and are very important organic ligands, which are widely used in the synthesis of medicine, macromolecules, optical materials, magnetic materials, and inorganic complexes. Moreover, the complexes constructed by it have a wide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/42H01F41/02C07F5/00
Inventor 邹华红梁福沛
Owner GUANGXI NORMAL UNIV
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