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Bifunctional molecular magnet material and its synthesis method

A technology of bifunctional molecules and synthetic methods, applied in the field of preparation of molecular magnetic materials, can solve problems such as stagnation

Inactive Publication Date: 2017-03-08
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, research on this aspect at home and abroad is still stagnant.

Method used

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  • Bifunctional molecular magnet material and its synthesis method
  • Bifunctional molecular magnet material and its synthesis method
  • Bifunctional molecular magnet material and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0051] Example 1 The best reaction molar ratio selection

[0052] According to the synthesis method of the above-mentioned bifunctional molecular magnet, select CoCl 2 •6H 2 O, 4'-(4-chlorophenyl)-2,2':6',2''-terpyridine ligand, Dy 2 o 3 and p-nitrobenzoic acid were weighed at the molar ratios of 1:2:1:8, 1:1:1:8, and 2:1:1:8, respectively, and reacted at 180°C for 4320min. After the reaction, the products obtained under three different ratios were observed under a microscope:

[0053] Purple-red crystals were all precipitated. Compared with the results, the crystals prepared at the ratio of 1:2:1:8 had the best quality, large size, high purity, and high yield (respectively 70%, 55%, and 38%). In summary, this example shows that the optimal reaction molar ratio for the preparation of bifunctional molecular magnets is 1:2:1:8.

example 2

[0054] The selection of example 2 optimal reaction temperature

[0055] According to example 1, select the optimal reaction molar ratio CoCl 2 •6H 2 O: 4'-(4-chlorophenyl)-2,2':6',2''-terpyridine Ligand: Dy 2 o 3 : p-nitrobenzoic acid=1:2:1:8, choose different reaction temperatures 160°C, 180°C, 200°C respectively, and react for 3 days. Colorless transparent needle-like crystals (precipitation of the ligand), the product is not pure; the products obtained at 180°C are all large purple-red crystals, which are phase-pure; at 200°C, the reaction purple-red crystals are small, and there are black impurities on the crystal surface. Comparing the obtained results, 180°C is the optimum reaction temperature of the bifunctional molecular magnet.

example 3

[0056] Example 3 Selection of Optimal Response Time

[0057] According to examples 1 and 2, choose the best reaction ratio 1:2:1:8, the best reaction temperature is 180°C, and choose different reaction times: 2 days, 3 days, and 4 days, and it is found that the crystals obtained after 2 days of reaction The crystals were small and the yield was low at 40%; the crystals obtained after 3 days of reaction were large and very pure with a yield of 70%; after 4 days of reaction, the resulting product was charred, most of which were twins, and could not be tested. Comparing the results, the best response time is 3 days.

[0058] Based on examples 1, 2, and 3, the best preparation condition for bifunctional molecular magnets is CoCl 2 •6H 2 O: 4'-(4-chlorophenyl)-2,2':6',2''-terpyridine Ligand: Dy 2 o 3 : Under the condition of p-nitrobenzoic acid=1:2:1:8, react at 180°C for 3 days.

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Abstract

The invention discloses a bifunctional molecular magnet material, whose structural formula is [Co(4‑Cl‑PH‑terpy)2][Dy3(p‑NO2‑PHCOO)14], wherein Dy is a rare earth metal dysprosium ion, and Co is Transition metal ion, p‑NO2‑PHCOO is p-nitrobenzoic acid anion, 4‑Cl‑PH‑terpy is 4‑(4‑chlorophenyl)‑terpyridine. It integrates two functions of slow relaxation and spin conversion, composed of cobalt dichloride hexahydrate (CoCl2•6H2O), 4'‑(4‑chlorophenyl)‑2,2':6',2'' ‑Terpyridine, dysprosium trioxide (Dy2O3), p-nitrobenzoic acid and other raw materials are synthesized. The bifunctional molecular magnet prepared by the method of the present invention not only retains the good slow relaxation behavior of dysprosium (Dy), but also realizes the high-low spin conversion of cobalt (Co). This type of bifunctional molecular magnet material is unprecedented at home and abroad of.

Description

technical field [0001] The invention relates to a preparation method of a molecular magnetic material, which belongs to the technical field of functional material synthesis. Background technique [0002] The study of molecular magnetic materials has become one of the most active frontier research fields spanning many disciplines such as physics, chemistry, material science, life science and information science. Molecular magnetic materials break through the limitations of traditional magnetic materials in terms of size, and can perform functions such as switching, sensing, and displaying on the microscale, and can also be used as ultra-high-density magnetic storage materials. A class of materials that have made major breakthroughs in the field of advanced materials research. The 12th International Conference on Molecule-Based Magnets organized by the School of Chemistry and Molecular Engineering of Peking University, the Beijing National Laboratory for Molecular Sciences an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/42C07F15/06
Inventor 罗峰罗明标张晓静李建强刘淑娟
Owner EAST CHINA UNIV OF TECH
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