Method for preparing metal crown ether single-molecular magnets

A technology of single-molecule magnets and crown ethers, which is applied in the field of preparation of single-molecule magnets, can solve the problems of low yield, achieve high yield, solve the effects of low synthesis yield and strong repeatability

Inactive Publication Date: 2019-05-03
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low yield in the existing method for synthesizing metal crown ether rare earth complex single-molecule magnets, and to provide a preparation method of metal crown ether single-molecule magnets

Method used

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  • Method for preparing metal crown ether single-molecular magnets
  • Method for preparing metal crown ether single-molecular magnets
  • Method for preparing metal crown ether single-molecular magnets

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specific Embodiment approach 1

[0020] Embodiment 1: This embodiment is a method for preparing a metal crown ether single-molecule magnet, which is specifically completed according to the following steps:

[0021] Dissolve salicylic hydroxamic acid, dysprosium nitrate and gallium nitrate in methanol, sonicate until the solution is clarified to obtain solution A; in the solution A, the mass ratio of salicylic hydroxamic acid, dysprosium nitrate and gallium nitrate is 4:1:4 ; The volume ratio of the quality of the salicylic hydroxamic acid to methanol is 0.0021g~0.0022g:1mL; Pyrazine is added in the solution A, sonicated until the solution is clear, then stirred at room temperature for 10h~14h to obtain the solution B; the substance ratio of the pyrazine to the salicylhydroxamic acid in the solution A is 12:4; add pyridine to the solution B, and stir at room temperature for 10min to 20min to obtain a preform; the volume of the pyridine and methanol The ratio is 1:20; the preform is subjected to solvent volatil...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the volume ratio of the mass of salicylic hydroxamic acid to methanol is 0.00214g:1mL. Others are the same as the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that pyrazine is added to solution A, ultrasonicated until the solution is clear, and then stirred at room temperature for 12 hours to obtain solution B. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing metal crown ether single-molecular magnets, and relates to a method for preparing single-molecular magnets. The invention aims to solve the problem of alow yield of a method for synthesizing metal crown ether rare earth complex single-molecular magnets in the prior art. The preparation method comprises the steps: dissolving salicyl hydroxamic acid, dysprosium nitrate and gallium nitrate in methanol so as to obtain a solution A, adding pyrazine to the solution A, performing stirring for a reaction so as to obtain a solution B, then adding pyridine, performing stirring at room temperature so as to obtain a preform, volatilizing the solvent of the preform so as to obtain the metal crown ether single-molecular magnets {Dy<3+>[Ga(III)MCshi]}. Themethod has the advantages that (1) the metal crown ether single-molecular magnets are single-molecular magnets with good antiferromagnetism, and (2) the preparation method is simple, and has high repeatability and a high yield which can reach 50% or above. The method is mainly applied to preparation of the metal crown ether single-molecular magnets {Dy<3+>[Ga(III)MCshi]}.

Description

technical field [0001] The invention relates to a preparation method of a single-molecule magnet. Background technique [0002] Single-molecular magnets (Single–Molecular Magnets, SMMs) are new materials between molecular-based magnets and nanomagnetic materials; they refer to those single molecules that can be magnetized under a magnetic field and can still maintain magnetism when the magnetic field is removed. Hysteresis loops appear on the curve of the magnetization against the external magnetic field. The first single-molecule magnet [Mn 12 o 12 (OCMe) 16 (H 2 O) 4 ] The discovery of clusters opened up a new field of magnetism. With the deepening of the research, the researchers found that these single-molecule magnets exhibit the temperature of the magnetic relaxation effect (blocking temperature T B ) is generally low, which greatly limits its application. Therefore, researchers expect to increase the blocking temperature by synthesizing other types of single-m...

Claims

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Application Information

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IPC IPC(8): C07F5/00H01F1/42
Inventor 高婷孙鸥闫鹏飞李洪峰
Owner HEILONGJIANG UNIV
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