Chiral rare earth-nitroxyl radical single-chain magnet and preparation method thereof

A nitrogen-oxygen radical, rare earth technology, applied in magnetic objects, organic chemical methods, chemical instruments and methods, etc., can solve the problems of molecular magnetic chirality chemical chirality synthesis and separation difficulties, etc.

Inactive Publication Date: 2018-08-03
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that molecular magnetic chiral chemistry suffers from conventional chiral synthesis and separation difficulties, and to provide a single-chiral ligand to synthesize chiral rare earth-nitrogen free radical single-chain magnet and its preparation method

Method used

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  • Chiral rare earth-nitroxyl radical single-chain magnet and preparation method thereof
  • Chiral rare earth-nitroxyl radical single-chain magnet and preparation method thereof
  • Chiral rare earth-nitroxyl radical single-chain magnet and preparation method thereof

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Embodiment

[0021] The preparation method of the chiral rare earth-nitroxide radical single-chain magnet comprises the following steps:

[0022] 1) Synthesis of (1R)-(-)-Myrtenal-NIT:

[0023] In a 25mL round-bottomed flask, 20mL of anhydrous methanol was added to dissolve 0.74g (5mmol) of 2,3-dimethyl-2,3-dihydroxyaminobutane, and 0.76mL (0.75g, 5mmol) of (1R) was added after 5 minutes. -(-)-Myrtleenal was stirred at room temperature for two days to obtain a colorless and transparent oily liquid, the solvent was removed under reduced pressure, the oily substance was dissolved in 100 mL of dichloromethane, stirred for 5 minutes in an ice bath, and added 1.1 g of sodium periodate was dissolved in 30 mL of water to prepare a sodium periodate solution, reacted in an ice bath for 25 minutes, and then separated, washed repeatedly, dried, and removed under reduced pressure to remove the solvent, and collected to obtain a blue oil; use petroleum ether The eluent with a volume ratio of ethyl ace...

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Abstract

The invention relates to a chiral rare earth-nitroxyl radical single-chain magnet and a preparation method thereof. A chemical reaction of the single-chain magnet is [Dy(hfac)3((1R)-(-)-Myrtenal-NIT)]n, wherein n is a natural number from 1 to positive infinity. The preparation method comprises the following steps: a hexane solution of hexafluoroacetone dysprosium is backflowed for 2 hours, a dichloromethane solution of (1R)-(-)-Myrtenal-NIT is added for a reaction for several minutes, and room-temperature volatilization is carried out to obtain a target product. A simple chemical synthesis iscarried out to prepare a chiral rare earth-nitroxyl radical complex, the complex presents zero-field slow-magnetic relaxation behavior, and hysteresis loop is realized. The chiral single-chain magnetmaterial has latent application value on high-density information storage, a quantum computer and a spin-electron device, and correlation and mutual influence between chirality and magnetic phenomenoncan be understood for people.

Description

【Technical field】 [0001] The invention belongs to the technical field of functional material preparation, and relates to a chiral rare earth-nitroxide radical complex type single-chain magnet and a preparation method thereof. 【Background technique】 [0002] As one of the most important information storage materials, magnetic storage materials have had a profound impact on human life and production, and the emergence of molecular nanomagnets has greatly promoted the development of this field. It is a superparamagnet based on a single molecule or molecular nanochain, which has the properties of magnetic bistability and hysteresis loop unique to traditional magnets, and can also be used as an information storage material in theory. And unlike traditional magnets, its magnet properties are based on a single molecule or single chain, that is, a molecule or a molecular chain can represent a "0" or "1" state, thus storing one bit of data. Although this field has been developed for...

Claims

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Application Information

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IPC IPC(8): C07F5/00H01F1/00H01F1/42
CPCC07B2200/07C07B2200/13C07F5/003H01F1/0072H01F1/42
Inventor 师唯刘晓庆程鹏
Owner NANKAI UNIV
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