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Inorganic-organic hybrid gadolinium-based molecular-based low-temperature magnetic refrigeration material and preparation method thereof

A technology of low-temperature magnetic refrigeration and organic hybridization, applied in the fields of organic chemistry, magnetism of organic materials/organic magnetic materials, organic chemistry, etc. Problems such as reporting or use, to achieve the effect of simple method, easy access to raw materials, and simple raw materials

Inactive Publication Date: 2017-08-15
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no public report or application of inorganic-organic hybrid gadolinium-based molecular-based magnetic refrigeration materials.

Method used

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  • Inorganic-organic hybrid gadolinium-based molecular-based low-temperature magnetic refrigeration material and preparation method thereof
  • Inorganic-organic hybrid gadolinium-based molecular-based low-temperature magnetic refrigeration material and preparation method thereof
  • Inorganic-organic hybrid gadolinium-based molecular-based low-temperature magnetic refrigeration material and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0028] In this embodiment, 0.08g gadolinium chloride, 0.05g oxalic acid and 0.2mL hypophosphorous acid are added to 10mL polytetrafluoroethylene as the lining stainless steel reaction kettle and dissolved with 6mL water, then the stainless steel reaction kettle with the reaction solution is sealed, and Crystallize in an oven at 80°C for 3 days. After the reaction is completed, take out the stainless steel reactor and let it cool naturally at room temperature. Remove the crystals generated in the stainless steel reactor and wash them repeatedly with deionized water for 5 times. Dry at room temperature to obtain a colorless blocky crystals.

[0029] The single crystal diffraction data analysis of the colorless blocky crystal prepared in this example shows that the obtained complex has a 2D layer structure, wherein the inorganic ligand hypophosphorous acid adopts η 1 :η 1 :μ 2Mode bridging two gadolinium atoms, organic ligand oxalic acid adopts η 1 :η 1 :η 1 :η 1 :μ 2 The ...

Embodiment 2

[0031] In this embodiment, 0.08g gadolinium chloride, 0.05g oxalic acid and 0.3mL hypophosphorous acid are added to 10mL polytetrafluoroethylene as the lining stainless steel reaction kettle and dissolved with 6mL water, then the stainless steel reaction kettle with the reaction solution is sealed, and After crystallization in an oven at 80° C. for 3 days, colorless massive crystals were obtained. After cooling, filtering, washing and drying as in Example 1, the characteristics and results of the target product obtained were the same as those in Example 1.

Embodiment 3

[0033] In this embodiment, 0.08g gadolinium chloride, 0.05g oxalic acid and 0.4mL hypophosphorous acid are added to 10mL polytetrafluoroethylene as the lining stainless steel reaction kettle and dissolved with 6mL water, then the stainless steel reaction kettle with the reaction solution is sealed, and After crystallization in an oven at 80° C. for 3 days, colorless massive crystals were obtained. After cooling, filtering, washing and drying as in Example 1, the characteristics and results of the target product obtained were the same as those in Example 1.

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Abstract

The invention belongs to the technical field of low-temperature magnetic refrigeration materials and relates to an inorganic-organic hybrid gadolinium-based molecular-based low-temperature magnetic refrigeration material and a preparation method thereof. By assembly study on hypophosphorous acid as an inorganic ligand, oxalic acid as an organic ligand and gadolinium chloride, the inorganic-organic hybrid gadolinium-based molecular-based low-temperature magnetic refrigeration material is prepared. A molecular formula of the prepared low-temperature magnetic refrigeration material is [Gd(C2O4)(H2PO2)(H2O)2], the molecular weight is 346.29, crystallographic data is described in the description, Z is equal to 4, and a space group is P21 / n. The inorganic-organic hybrid gadolinium-based molecular-based low-temperature magnetic refrigeration material and the preparation method thereof are simple and available in raw materials, simple in method, convenient to operate and good in repeatability.

Description

Technical field: [0001] The invention belongs to the technical field of low-temperature magnetic refrigeration materials, and in particular relates to an inorganic-organic hybrid gadolinium-based molecular-based low-temperature magnetic refrigeration material and a preparation method thereof. Background technique: [0002] Refrigeration technology provides great convenience for people to preserve food, scientific research and have a comfortable living space. However, as energy and environmental issues become increasingly prominent, refrigeration technology is also facing a new revolution. In terms of room temperature refrigeration technology, although Freon substitutes no longer destroy the atmospheric ozone layer, the refrigeration efficiency is low, energy consumption is large, and produces a greenhouse effect; in terms of low-temperature refrigeration technology, because liquid helium is becoming more and more scarce and expensive, the recycling rate is low. Moreover, mos...

Claims

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Application Information

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IPC IPC(8): C07F5/00C09K5/14H01F1/42
CPCC07B2200/13C07F5/003C09K5/14H01F1/42
Inventor 韩松德王国明潘杰魏丽薛镇镇
Owner QINGDAO UNIV
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