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Preparation method for monomolecular magnet [Co4(hmb)4(mu3-OMe)4(MeOH)4]

A single-molecule magnet, 3-ome technology, used in magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of difficult to control magnetic exchange angle and intermolecular force, and achieve easy control of chemical composition. , good repeatability, simple process effect

Active Publication Date: 2012-04-25
平邑经济开发区投资发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to control the magnetic exchange angle and intermolecular force by the usual synthetic method.

Method used

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  • Preparation method for monomolecular magnet [Co4(hmb)4(mu3-OMe)4(MeOH)4]
  • Preparation method for monomolecular magnet [Co4(hmb)4(mu3-OMe)4(MeOH)4]
  • Preparation method for monomolecular magnet [Co4(hmb)4(mu3-OMe)4(MeOH)4]

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) 0.36 grams of analytically pure Co(ClO 4 ) 2 ·6H 2 O and 0.15 gram of analytically pure o-vanillin are dissolved in the mixed solution of anhydrous methanol and analytically pure acetonitrile in a volume ratio of 1: 1 in 9 milliliters;

[0018] (2) Slowly add analytically pure triethylamine in the prepared solution of step (1), and constantly stir, adjust the pH value at 8;

[0019] (3) Transfer the solution prepared in step (2) into a polytetrafluoroethylene reactor, react at 80°C for 72 hours, cool down to room temperature, open the kettle, filter, and use a volume ratio of 1:1 without Washing with a mixed solution of water, methanol and analytically pure acetocyanide to obtain a single-crystal grade cobalt-based cluster compound.

Embodiment 2

[0021] (1) 0.38 grams of analytically pure Co(ClO 4 ) 2 ·6H 2 O and 0.2 gram of analytically pure o-vanillin are dissolved in 10 milliliters of anhydrous methanol with a volume ratio of 1: 1 and the mixed solution of analytically pure acetonitrile;

[0022] (2) Slowly add analytically pure sodium hydroxide to the prepared solution of step (1), and constantly stir, and adjust the pH value at 9;

[0023] (3) Transfer the solution prepared in step (2) into a polytetrafluoroethylene reaction kettle, react at 75°C for 70 hours, cool down to room temperature, open the kettle, filter, and use a volume ratio of 1:1 without Washing with a mixed solution of water, methanol and analytically pure acetocyanide to obtain a single-crystal grade cobalt-based cluster compound.

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Abstract

The invention discloses a preparation method for a monomolecular magnet [Co4(hmb)4(mu3-OMe)4(MeOH)4]. The method comprises the following steps of: (1) dissolving 0.3-0.4 g of analytically pure Co(ClO4)2.6H2O and 0.1-0.3 g of analytically pure o-vanillin in 8-12 ml of mixed solution of absolute methanol and analytically pure acetonitrile in volumetric ratio of 1:1; (2) slowly adding analytically pure triethylamine or analytically pure sodium hydroxide into the solution prepared in the step (1), continuously stirring, and adjusting the pH value to be 8-9; and (3) transferring the solution prepared in the step (2) into a reaction kettle of polytetrafluoroethylene, reacting at the temperature of 70-90 DEG C for 60-80 hours, cooling to room temperature, opening the kettle, filtering, and washing with the mixed solution of the absolute methanol and the analytically pure acetonitrile in volumetric ratio of 1:1. The method overcomes the defect of poor repeatability of a solution method, and has the advantages of simple process, low cost, easiness in control over chemical components, superior repeatability, high yield and the like.

Description

technical field [0001] The invention relates to a cobalt-based single-molecule magnet preparation technology, and relates to a salt of an anion (perchlorate) with weak coordination ability and a special reaction system (acetocyanide and methanol mixed system) to adjust a suitable temperature. A preparation method for obtaining cobalt-based single-molecule magnets under solvothermal conditions. Background technique [0002] A single-molecule magnet is a molecular magnet with a true nanometer size (molecular diameter between 1-2nm), that is, the first molecular unit composed of discrete nanometer-sized molecular units that have no interaction in a magnetic sense. A magnet that is not composed of a three-dimensional extended lattice (such as metal, metal oxide, etc.). Single-molecule magnets can be prepared by solution methods from relatively simple reagents and can be easily purified. It has good solubility and can be dissolved in common organic solvents, which just meets th...

Claims

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Application Information

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IPC IPC(8): H01F1/00H01F41/02C07F15/06
Inventor 张淑华肖瑜郭晶晶张义东王寅光刘峥
Owner 平邑经济开发区投资发展有限公司
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