Cobalt-naphthalene ring nitrogen-oxygen free radical molecular magnet material with 6.3T coercive force and preparation method of molecular magnet material

A nitroxide radical, molecular magnet technology, applied in the fields of organic material/organic magnetic material magnetism, chemical instruments and methods, organic chemistry, etc., can solve the problems of poor sample stability, complicated operation, difficult characterization, etc. Stability, simple preparation method, and the effect of reducing information loss

Inactive Publication Date: 2019-03-26
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a stable naphthalene ring nitroxide free radical for some disadvantages presented by the current method of building a molecular magnet with a large coercive field, such as complicated operation, poor sample stability, and difficult characterization. Molecular magnet with high coercive field as ligand and preparation method thereof

Method used

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  • Cobalt-naphthalene ring nitrogen-oxygen free radical molecular magnet material with 6.3T coercive force and preparation method of molecular magnet material
  • Cobalt-naphthalene ring nitrogen-oxygen free radical molecular magnet material with 6.3T coercive force and preparation method of molecular magnet material
  • Cobalt-naphthalene ring nitrogen-oxygen free radical molecular magnet material with 6.3T coercive force and preparation method of molecular magnet material

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Experimental program
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Embodiment 1

[0020] The preparation method of described cobalt-naphthalene ring nitroxide free radical molecular magnet material comprises the following steps:

[0021] 1) Synthesis of EtONapNIT:

[0022] Add 0.74g (5mmol) of 2,3-dimethyl-2,3-dihydroxyaminobutane into a 25mL round bottom flask, then add a mixed solvent of 10mL methanol and 10mL dichloromethane to dissolve, stir for 10 minutes and then add 1.00g (5mmol) of 2-ethoxy-1-naphthaldehyde was stirred for two days at 45°C under the protection of argon to obtain a light yellow oily liquid, which was evaporated under reduced pressure and dissolved in 80mL of chloroform, and placed in an ice bath Stir vigorously at low temperature for 10 minutes, add 30mL aqueous solution containing 1.1g sodium periodate to it, continue to stir in an ice bath for about 30 minutes, then carry out liquid separation, wash the water phase, dry the organic phase, and distill under reduced pressure to finally obtain deep purple Oily matter; select sherwood...

Embodiment 2

[0027] The preparation method of described cobalt-naphthalene ring nitroxide free radical molecular magnet material comprises the following steps:

[0028] 1) Synthesis of EtONapNIT:

[0029] Add 0.45g (3mmol) of 2,3-dimethyl-2,3-dihydroxyaminobutane into a 25mL round bottom flask, then add a mixed solvent of 8mL methanol and 5mL dichloromethane to dissolve, stir for 5 minutes and then add 0.65g (3.2mmol) of 2-ethoxy-1-naphthaldehyde was stirred at 30°C for 36 hours under the protection of argon to obtain a light yellow oily liquid, which was dissolved in 50mL of dichloromethane and stirred for 5 minutes under ice bath , add 30mL containing the aqueous solution of 0.65g sodium periodate wherein, continue ice-bath reaction 25 minutes, carry out liquid separation, wash water phase, dry organic phase, vacuum distillation subsequently, finally obtain dark purple oily substance; Use sherwood oil and A solvent with a volume ratio of ethyl acetate of 3:1 was used as an eluent, and t...

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Abstract

The invention relates to a cobalt-naphthalene ring nitrogen-oxygen free radical molecular magnet material with 6.3T coercive force and a preparation method of the molecular magnet material. The chemical formula of a molecular magnet is [Co(hfac)2(EtONapNIT)]n, wherein n is a natural number from 1 to positive infinity. The preparation method of the molecular magnet material comprises the followingsteps: enabling normal hexane suspension liquid of cobalt hexafluoroacetylacetonate to reflux for more than two hours, cooling and adding dichloromethane solution of EtONapNIT to react, and volatilizing for several days at room temperature to obtain a target product. The the molecular magnet material is simple in preparation method, mild in reaction conditions and high in yield, and has very goodair stability. The complex shows slow magnetic relaxation behavior in a zero field, and has a very large hysteresis loop at 2K, and the coercive field is close to 6.3T. The molecular magnet material with a large coercive field can effectively reduce the information loss conditions of an information storage device in environmental perturbation, and thus has a very high potential application value in the field of high-density information storage.

Description

【Technical field】 [0001] The invention belongs to the technical field of preparation of functional materials, and relates to a cobalt-nitrogen radical magnet with a coercive force of 6.3T and a preparation method thereof. 【Background technique】 [0002] Molecular magnets are an important potential magnetic storage material due to their ability to exhibit magnetic relaxation and / or hysteresis loops at low temperatures, and thus have attracted extensive attention from scientists. In view of the great potential of molecular magnets in the field of high-density storage, scientists are committed to studying how to realize the practical application of molecular magnets as soon as possible. Although a large number of molecular magnets with excellent performance have been reported, the properties of most molecular magnets are still not comparable to those of traditional magnets, so it is difficult to meet the practical application. The synthesis of molecular magnets with high block...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/06H01F1/42
CPCC07F15/065H01F1/42
Inventor 师唯刘晓庆程鹏
Owner NANKAI UNIV
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