CN111560120A - Preparation method of two-dimensional magnetic coordination polymer based on cyclotriphosphazene derivative - Google Patents
Preparation method of two-dimensional magnetic coordination polymer based on cyclotriphosphazene derivative Download PDFInfo
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Abstract
The invention provides a preparation method of a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative, belonging to the field of metal organic coordination polymers and molecular-based magnetic materials. The invention comprises the following steps: (1) mixing dysprosium salt and cyclotriphosphazene derivative according to a molar ratio of 3-4:1, adding N, N-dimethylformamide and water, and finally adding strong acid to obtain a mixed solution; (2) adding the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining for crystallization at the temperature of 120-130 ℃ to generate crystals; (3) after filtering out the crystal, washing the crystal by reaction mother liquor and ethyl ether in turn, and drying to obtain the crystal. The prepared rare earth coordination polymer not only overcomes the defect of poor thermal stability of the rare earth coordination polymer, shows high thermal stability, can still keep the structural stability at a high temperature close to 400 ℃, but also shows obvious alternating signals under the induction of an external field.
Description
Technical Field
The invention belongs to the field of metal organic coordination polymers and molecular-based magnetic materials, and particularly relates to a preparation method of a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative.
Background
The monomolecular magnet is formed by discrete single molecules with almost no interaction in the magnetic sense, and is a molecular magnet with a nano size in the true sense. The monomolecular magnet has a magnetic bistable state and a slow relaxation mechanism, so that the monomolecular magnet has potential application prospects in the fields of quantum computers, ultrahigh-density storage, spintronic devices and the like. Since the discovery of the first rare earth metal complex monomolecular magnet in 2003, rare earth monomolecular magnets have been rapidly developed, and particularly, rare earth metal dysprosium ions are ideal candidates for constructing novel high-performance monomolecular magnets due to the fact that the rare earth metal dysprosium ions have remarkable anisotropy and large spin ground state.
Currently studied rare earth monomolecular magnets are mainly focused on mononuclear and binuclear rare earth complexes and polynuclear rare earth cluster compounds. Recently, some rare earth coordination polymers are reported to show slow magnetic relaxation behavior of a monomolecular magnet, and the coordination polymers are dominated by a three-dimensional framework structure, have poor thermal stability and are easy to collapse and decompose at higher temperature.
The published Chinese patent with the application number of CN201810771298.4 discloses a preparation method of a mixed manganese cluster molecule-based magnetic material, which is prepared by performing wet ball milling and freeze drying treatment on a magnetic material formed by a manganese cluster nano molecule alloy, silver-sulfur nano cluster molecules, iron oxide, manganese oxide and zirconium oxide and a non-magnetic material formed by barium titanate, magnesium oxide, magnesium silicate, apatite and siliceous sandstone respectively, adding tetraethylene glycol dimethyl ether, benzyl dichlorosilane, sodium tartrate, calcium benzoate, tricarballylic acid, a stabilizer for reaction and the like, and then performing gradient melting, twin-screw extrusion, casting, liquid nitrogen rapid cooling, freeze curing, nitrogen blow-drying, high-temperature steam washing, natural airing and the like respectively. The prepared mixed manganese cluster molecule-based magnetic material has excellent electromagnetic performance, high frequency, saturated magnetic flux density, and better temperature stability and mechanical impact property. The crystal material in the application has poor thermal stability, the structure can be changed at the temperature of more than 400 ℃, and the magnetism disappears.
The polymer in the prior art has poor thermal stability and poor magnetic anisotropy.
Disclosure of Invention
In view of the above, the present invention provides a method for preparing a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative, wherein the two-dimensional layered coordination material is formed by self-assembly coordination of a rare earth metal dysprosium salt and the cyclotriphosphazene derivative, the coordination material exhibits high thermal stability, and the structural stability can be maintained at a high temperature close to 400 ℃. The metal center of the complex molecule has strong magnetic anisotropy, and the coordination material shows obvious alternating current signals under the induction of an external field.
The invention relates to a preparation method of a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative, which comprises the following steps:
(1) mixing dysprosium salt and cyclotriphosphazene derivative according to the molar ratio of 3-4:1, and adding N, N-
Dimethylformamide and water, and finally adding strong acid to obtain a mixed solution; the volume ratio of the N, N-dimethylformamide to the water is 1: 4-5;
(2) adding the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining at the temperature of 120 ℃ and 130 DEG C
Crystallizing to obtain a block colorless crystal with good crystallinity, wherein the crystallization time is 3-4 days (the volume of a stainless steel reaction kettle is 25 mL);
(3) filtering to obtain crystal, washing with reaction mother liquor and ethyl ether, and drying at room temperature to obtain
Crystals of a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative.
Wherein the dysprosium salt can be dysprosium nitrate hexahydrate, the cyclotriphosphazene derivative is hexa (4-carboxyphenyl) cyclotriphosphazene, and the strong acid is concentrated nitric acid.
The volume ratio of the N, N-dimethylformamide to the concentrated nitric acid is 2-3: 1.
in addition, the crystal of the two-dimensional magnetic coordination polymer based on the cyclotriphosphazene derivative has the molecular formula Dy2(H3L)2(DMF)nIn the molecular formula, a ligand L is deprotonated hexa (4-carboxyphenyl) cyclotriphosphazene, and DMF is N, N-dimethylformamide.
The reaction mechanism of the preparation method of the invention is as follows: the prepared rare earth coordination polymer is a compound which is highly regular and has a certain repeating unit and is formed by connecting dysprosium ions and organic ligands through coordination bonds. The typical coordination reaction adopts a solvothermal method. In the reaction process, hexa (4-carboxyphenyl) ring triphosphonitrile is used as an organic bridging ligand, and dysprosium salt provides central coordination ions; n, N-dimethylformamide is not only used as a solvent, but also participates in coordination with dysprosium ions; the concentrated nitric acid can adjust the pH value in the system, reduce the deprotonation rate, slow down the reaction rate of the system and be beneficial to forming crystals with good crystallinity.
The poor thermal stability of the rare earth coordination polymer is an important factor for restricting the wide application of the material. In the invention, the structure of the selected organic ligand hexa (4-carboxyphenyl) cyclotriphosphazene not only contains high-stability cyclotriphosphazene, but also has six flexible (4-carboxyphenyl) coordination arms, which is favorable for forming a high-stability coordination configuration with rare earth metal ions. The 4f electron orbit of the rare earth metal dysprosium ion has 9 electrons, and the rare earth metal dysprosium ion has different responses to magnetic fields in various directions under the action of strong electron orbit coupling, thereby showing stronger magnetic anisotropy. As dysprosium ions in the material have larger spin electron ground state and strong magnetic anisotropy, and the applied external field can inhibit partial magnetization quantum tunneling effect, the prepared material shows an obvious alternating current signal.
The prepared rare earth coordination polymer not only overcomes the defect of poor thermal stability of the rare earth coordination polymer, shows high thermal stability, can still keep the structural stability at a high temperature close to 400 ℃, but also shows an obvious alternating signal under the induction of an external field, and can be used as a potential molecular-based magnetic material.
Drawings
FIG. 1 is a structural diagram of single crystal diffraction analysis of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer prepared by a preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer according to an embodiment of the present invention;
FIG. 2 is a powder diffraction diagram of a sample of microcrystals of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer prepared by a preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer according to an embodiment of the present invention;
FIG. 3 is an infrared characterization diagram of a sample of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer microcrystal prepared by the preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer according to an embodiment of the present invention;
FIG. 4 is a thermogravimetric analysis diagram of a sample of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer microcrystal prepared by the preparation method of the cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer according to the embodiment of the present invention;
FIG. 5 is a DC susceptibility diagram of a sample of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer microcrystal prepared by the preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer according to an embodiment of the invention at different temperatures;
FIG. 6 is a graph of magnetization intensity of samples of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer microcrystal prepared by the preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer according to an embodiment of the present invention at low temperature under different magnetic fields;
fig. 7 is an ac susceptibility diagram of a sample of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer microcrystal prepared by the preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer in an external field of 1000 Oe at different temperatures.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
In order to better explain the technical solutions and advantages of the present invention, the present invention is further described below by way of embodiments and with reference to the accompanying drawings. It should be noted that the following examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as those skilled in the art will be able to make insubstantial modifications and variations of this invention in light of the above teachings, and will nevertheless fall within the scope of this invention.
Example 1
Please refer to fig. 1 to 7, wherein: FIG. 1 is a single crystal diffraction analysis structural diagram of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer prepared by a preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer provided in this example, (a) is a schematic diagram of a minimum asymmetric unit of the coordination polymer; (b) is a schematic diagram of a two-dimensional layered structure formed by stacking the coordination polymer molecules; FIG. 2 is a powder diffraction pattern of a sample of microcrystals of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer prepared by the method for preparing a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer provided in this example; FIG. 3 is an infrared characterization diagram of a sample of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer microcrystal prepared by the preparation method of the cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer provided in this example; FIG. 4 is a thermogravimetric analysis chart of a microcrystalline sample of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer prepared by the preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer provided in this example; FIG. 5 is a DC susceptibility diagram of samples of microcrystalline two-dimensional magnetic coordination polymer based on cyclotriphosphazene derivative prepared by the preparation method of two-dimensional magnetic coordination polymer based on cyclotriphosphazene derivative provided in this example at different temperatures; FIG. 6 is a graph showing magnetization of samples of microcrystals of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer prepared by the preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer provided in this example under low temperature in different magnetic fields; fig. 7 is a graph of ac magnetic susceptibility of a sample of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer crystallite prepared by the preparation method of a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer provided in this example at different temperatures under an external field of 1000 Oe.
A preparation method of a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative is characterized by comprising the following steps:
(1) in this example, 12 mg of dysprosium nitrate hexahydrate and 6 mg of ligand hexa (4-carboxyphenyl) cyclotriphosphazene were added into 1mL of N, N-dimethylformamide and 4 mL of water, 0.5 mL of concentrated nitric acid was added dropwise, and after uniform mixing, the mixed solution was transferred into a stainless steel reaction kettle with a polytetrafluoroethylene lining;
(2) crystallizing in an oven at 130 deg.C for 3 days, cooling to room temperature for 12 hr to obtain colorless bulk crystal;
(3) filtering, washing the reaction mother liquor and ethyl ether in sequence, and drying to obtain the final product.
The yield was about 56% (based on metallic dysprosium). Referring to fig. 1 to 7, the crystal has the following elemental analysis results: call for C87H54N7O37P6Dy2H2.37%, C45.43%, N4.26%; found H2.17%, C46.71%, N4.52%. This example performed single crystal diffraction experiments on the prepared colorless bulk crystal and analyzed the data, and the result showed that the obtained coordination material has a two-dimensional layered structure (as shown in fig. 1), in which dysprosium ion is coordinated with seven oxygen atoms, five carboxylate groups provide six oxygen atoms, and solvent molecule DMF provides one oxygen atom. It is worth mentioning that the ligand hexa (4-carboxyphenyl) cyclotriphosphazene has only three carboxyl groups at one end involved in the coordination and three carboxyl groups at the other end not.
This example carried out thermogravimetric analysis experiments on the colorless bulk crystals prepared. As shown in FIG. 4, the results show that the obtained complex material has excellent thermal stability. The structure can still be kept stable at high temperature close to 400 ℃, which is very rare in rare earth metal coordination polymers.
This example carried out a magnetic test experiment on the prepared colorless bulk crystal. As shown in fig. 5 to 7, the results show that the metal ions show weak antiferromagnetic interaction in the temperature range of 5 to 300K, and show ferromagnetic interaction at 5K or less. The complex has stronger magnetic anisotropy in molecules. In addition, the complex shows a relatively obvious alternating current signal under an external field of 1000 Oe.
The coordination polymer belongs to the monoclinic system. The complex is prepared by adopting a solvothermal method under the strong acid condition, and has the advantages of higher yield, good reproducibility and high thermal stability. Magnetic tests show that metal ions in the complex molecules mainly have antiferromagnetic interaction, and the complex molecules show obvious alternating current signals under the induction of an external field, namely the slow magnetic relaxation behavior of a monomolecular magnet, and can be used as a molecular-based magnetic material.
Example 2
A preparation method of a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative is characterized by comprising the following steps:
(1) in this example, 9 mg of dysprosium nitrate hexahydrate and 6 mg of ligand hexa (4-carboxyphenyl) cyclotriphosphazene were added to 1mL of N, N-dimethylformamide and 4.5 mL of water, and 0.3 mL of concentrated nitric acid was added dropwise and mixed uniformly;
(2) transferring the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, crystallizing for 3 days in an oven at 130 ℃, and cooling to room temperature for 12 hours to obtain colorless blocky crystals;
(3) filtering and washing by reaction mother liquor and ethyl ether in turn to obtain the final product.
The yield in this example was 63%, and the structural characterization and experimental results of the obtained target product were the same as those in example 1.
Example 3
A preparation method of a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative is characterized by comprising the following steps:
(1) in this example, 10mg of dysprosium nitrate hexahydrate and 6 mg of ligand hexa (4-carboxyphenyl) cyclotriphosphazene were added to 1mL of N, N-dimethylformamide and 5 mL of water, and 0.4 mL of concentrated nitric acid was added dropwise and mixed uniformly;
(2) transferring the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, crystallizing the mixed solution in an oven at the temperature of 130 ℃ for 3 days, and cooling the mixed solution to room temperature after 12 hours to obtain colorless blocky crystals;
(3) filtering and washing by reaction mother liquor and ethyl ether in turn to obtain the final product.
The yield in this example was 59%, and the structural characterization and experimental results of the obtained target product were the same as those in example 1.
Example 4
A preparation method of a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative is characterized by comprising the following steps:
(1) in this example, 12 mg of dysprosium nitrate hexahydrate and 6 mg of ligand hexa (4-carboxyphenyl) cyclotriphosphazene were added to 1mL of N, N-dimethylformamide and 4 mL of water, and 0.5 mL of concentrated nitric acid was added dropwise and mixed uniformly;
(2) transferring the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, crystallizing for 3 days in an oven at 130 ℃, and cooling to room temperature for 12 hours to obtain colorless blocky crystals;
(3) filtering and washing by reaction mother liquor and ethyl ether in turn to obtain the final product.
The yield in this example was 65%, and the structural characterization and experimental results of the obtained target product were the same as those in example 1.
The prepared rare earth coordination polymer not only overcomes the defect of poor thermal stability of the rare earth coordination polymer, shows high thermal stability, can still keep the structural stability at a high temperature close to 400 ℃, but also shows an obvious alternating signal under the induction of an external field, and can be used as a potential molecular-based magnetic material.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.
Claims (8)
1. A preparation method of a two-dimensional magnetic coordination polymer based on a cyclotriphosphazene derivative is characterized by comprising the following steps:
(1) mixing dysprosium salt and cyclotriphosphazene derivative according to the mass ratio of 1.5-2:1, adding N, N-dimethylformamide and water, and finally adding strong acid to obtain a mixed solution;
(2) adding the mixed solution into a reaction kettle for crystallization at the temperature of 120-130 ℃ to generate crystals;
(3) washing the reaction mother liquor and ethyl ether in sequence, and drying to obtain the crystal of the two-dimensional magnetic coordination polymer based on the cyclotriphosphazene derivative.
2. The method for preparing the two-dimensional magnetic coordination polymer based on the cyclotriphosphazene derivative according to claim 1, wherein the volume ratio of the N, N-dimethylformamide to the water is 1: 4-5.
3. The method for preparing the two-dimensional magnetic coordination polymer based on the cyclotriphosphazene derivative according to claim 2, characterized in that the dysprosium salt is dysprosium nitrate hexahydrate.
4. The method for preparing a cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer according to claim 3, characterized in that the cyclotriphosphazene derivative is hexa (4-carboxyphenyl) cyclotriphosphazene.
5. The method for preparing the two-dimensional magnetic coordination polymer based on the cyclotriphosphazene derivative according to claim 4, characterized in that the strong acid is concentrated nitric acid.
6. The method for preparing the two-dimensional magnetic coordination polymer based on the cyclotriphosphazene derivative according to claim 5, wherein the volume ratio of the N, N-dimethylformamide to the concentrated nitric acid is 2-3: 1.
7. the method for preparing the cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer according to claim 6, wherein the molecular formula of the crystal of the cyclotriphosphazene derivative-based two-dimensional magnetic coordination polymer is Dy2(H3L)2(DMF)nIn the molecular formula, a ligand L is deprotonated hexa (4-carboxyphenyl) cyclotriphosphazene, and DMF is N, N-dimethylformamide.
8. The method for preparing the two-dimensional magnetic coordination polymer based on the cyclotriphosphazene derivative according to claim 7, wherein the crystallization time is 3-4 days.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105086996A (en) * | 2015-08-26 | 2015-11-25 | 重庆理工大学 | Luminescent material with cyclotriphosphazene cross-linked rare-earth complexes and method for preparing luminescent material |
| CN108704621A (en) * | 2018-06-05 | 2018-10-26 | 东华理工大学 | A kind of amidoxime group core-shell structure magnetic poly phosphazene nanoparticle and its preparation and the application as uranium absorption agent |
-
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105086996A (en) * | 2015-08-26 | 2015-11-25 | 重庆理工大学 | Luminescent material with cyclotriphosphazene cross-linked rare-earth complexes and method for preparing luminescent material |
| CN108704621A (en) * | 2018-06-05 | 2018-10-26 | 东华理工大学 | A kind of amidoxime group core-shell structure magnetic poly phosphazene nanoparticle and its preparation and the application as uranium absorption agent |
Non-Patent Citations (4)
| Title |
|---|
| DEY, ATANU等: "Heterometallic Heptanuclear [Cu(5)Ln(2)] (Ln = Tb, Dy, and Ho) Single-Molecule Magnets Organized in One-Dimensional Coordination Polymeric Network", 《INORGANIC CHEMISTRY》 * |
| ERIC W. AINSCOUGH等: "Metal-Metal Communication in Copper(II) Complexes of Cyclotetraphosphazene Ligands", 《INORGANIC CHEMISTRY》 * |
| WEN-JING YU等: "Lanthanide coordination polymers with hexacarboxylate ligands derived from cyclotriphosphazene as bridging linkers: synthesis, thermal and luminescent properties", 《CRYSTENGCOMM》 * |
| 胡鹏等: "高性能稀土单分子磁体", 《人工晶体学报》 * |
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