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Structure-fine controllable Mn<2+> paramagnetic compound and its preparation method and use

A compound and synthesis method technology, applied in the field of Mn2 type paramagnetic compound and its preparation, can solve the problem of no paramagnetic compound structure and the like, and achieve the effects of low cost, abundant species and mild reaction conditions

Inactive Publication Date: 2013-08-07
KUNMING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many reports on new paramagnetic compounds every year. Although some of these compounds have the same geometric configuration, researchers also hope to find out the rules of their structure changes, but so far, no matter by modifying ligands or Changing the counterion, there is still no clear way to precisely tune the structure of paramagnetic compounds

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  • Structure-fine controllable Mn&lt;2+&gt; paramagnetic compound and its preparation method and use
  • Structure-fine controllable Mn&lt;2+&gt; paramagnetic compound and its preparation method and use
  • Structure-fine controllable Mn&lt;2+&gt; paramagnetic compound and its preparation method and use

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preparation example Construction

[0027] The preparation method of the Mn2 type paramagnetic compound that can finely regulate the structure of the present invention comprises the following steps:

[0028] A, synthesize respectively the Salen ligand Mn-Salen type binuclear compound [Mn(salen)(H) modified by ethylenediamine, 1,2-propylenediamine, 1,3-propylenediamine 2 O)] 2 Na[CrMo 6 (OH) 6 o 18 ]·20H 2 O(1) 、 [Mn(salmen)(H 2 O)] 2 Na[CrMo 6 (OH) 6 o 18 ]·18H 2 O(2), [[Mn(salpn)(H 2 O)] 2 Na[CrMo 6 (OH) 6 o 18 ]·17H 2 O(3);

[0029] B. Dissolve three Mn-Salen type dinuclear compounds in C 2 h 5 OH-CH 3 OH-H 2 In the mixed solvent of O, obtain Mn-Salen solution;

[0030] C, polyanion compound is dissolved in water, obtain polyanion aqueous solution;

[0031] D. Drop the Mn-Salen solution into the polyanion aqueous solution, and stir at a constant speed at 40-50° C. for 4-10 hours to obtain the Mn2 type paramagnetic compound.

[0032]The synthetic route of the Schiff base ligand is as fol...

Embodiment 1

[0045] Dinuclear compound [Mn(salen)(H 2 O)] 2 Na[CrMo 6 (OH) 6 o 18 ]·20H 2 O(1) ： 1.17g (1mmol) of Na 3 [CrMo 6 o 24 h 6 ]·8H 2 O was dissolved in 20ml of distilled water, and then dissolved with freshly prepared 0.88g (1mmol) [Mn(salen)(H 2 O)] 2 (ClO 4 ) 2 ·H 2 O 20ml of a mixed solution of methanol, ethanol and water was quickly added to the above solution, the mixed solution was sealed in an Erlenmeyer flask and stirred for 2 days, after filtration, the filtrate slowly evaporated at room temperature, dark brown flakes Crystalline 1 was formed within one week, and the yield was 35.8% based on Mo.

[0046] [Mn(salmen)(H 2 O)] 2 Na[CrMo 6 (OH) 6 o 18 ]·18H 2 O(2): 1.17g (1mmol) of Na 3 [CrMo 6 o 24 h 6 ]·8H 2 O was dissolved in 20ml of distilled water, and then dissolved with freshly prepared 0.88g (1mmol) [Mn(salmen)(H 2 O)] 2 (ClO 4 ) 2 ·H 2 A mixed solution of 20ml methanol, ethanol and water of O was quickly added to the above solution, a...

Embodiment 2

[0049] Dinuclear compound [Mn(salen)(H 2 O)] 2 Na[CrMo 6 (OH) 6o 18 ]·20H 2 O(1) ： 1.17g (1mmol) of Na 3 [CrMo 6 o 24 h 6 ]·8H 2 O was dissolved in 20ml of distilled water, and then dissolved with freshly prepared 0.88g (1mmol) [Mn(salen)(H 2 O)] 2 (ClO 4 ) 2 ·H 2 O 20ml mixed solution of methanol, ethanol and water was quickly added to the above solution, the mixed solution was sealed in a conical flask and stirred for 2 days, after filtration, the filtrate slowly evaporated at room temperature, dark brown flakes The yield of crystal 1 was 37.8% based on Mo in two weeks.

[0050] [Mn(salmen)(H 2 O)] 2 Na[CrMo 6 (OH) 6 o 18 ]·18H 2 O(2): 1.17g (1mmol) of Na 3 [CrMo 6 o 24 h 6 ]·8H 2 O was dissolved in 20ml of distilled water, and then dissolved with freshly prepared 0.88g (1mmol) [Mn(salmen)(H 2 O)] 2 (ClO 4 ) 2 ·H 2 A mixed solution of 20ml methanol, ethanol and water of O was quickly added to the above solution, and the mixed solution was seale...

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Abstract

The invention discloses a structure-fine controllable Mn<2+> paramagnetic compound and its preparation method and use. A complex precursor ligand is modified and is introduced to the same multi-anion framework so that the structure-fine controllable Mn<2+> paramagnetic compound is obtained. The preparation method comprises synthesizing an Mn-Salen type dual-core compound, preparing an Mn-Salen solution, preparing a multi-anion aqueous solution, dropwisely adding the Mn-Salen solution into the multi-anion aqueous solution, and carrying out constant-speed stirring at a temperature of 40 to 50 DEG C for 4 to 10h to obtain the structure-fine controllable Mn<2+> paramagnetic compound. The structure-fine controllable Mn<2+> paramagnetic compound can be used for molecular magnets. The preparation method realizes fine control of a magnetic complex first and provides a novel approach for magnetic compound controllable synthesis. The preparation method has mild conditions and a low cost, further enriches types of organic and inorganic hybrid materials and provides a novel method for research on properties of a single magnetic molecule.

Description

technical field [0001] The invention belongs to the technical field of chemical material preparation, and in particular relates to a Mn2 type paramagnetic compound whose structure can be finely regulated and its preparation method and application. Background technique [0002] The slow relaxation phenomenon exhibited by single-molecule magnets, etc., is the behavior of a single molecule. From a structural point of view, single-molecule magnets should be discrete and magnetically completely separated, otherwise the interaction between molecules may lead to intermolecular magnetic exchange or changes in magnetic behavior, such as ferromagnetism to antiferromagnetism. Some reported single-molecule magnets, although exhibiting fascinating magnetic behavior, are still affected by interactions between molecules due to the relatively short distance between molecules. Therefore, completely removing the magnetic behavior of intermolecular interactions is still a major challenge in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F13/00
Inventor 吴琼王海
Owner KUNMING UNIV
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