Mononuclear dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline as a ligand and its preparation method and application
A technology of hydroxyquinoline and complexes, which is applied in the field of magnetic materials, and achieves the effects of low cost, simple preparation method and good repeatability
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Embodiment 1
[0032] 45 mg (about 0.2 mmol) ligand 2-methyl-5,7-dibromo-8-hydroxyquinoline and 46 mg (about 0.1 mmol) Dy(NO 3 ) 3 ·6H 2 Add O to a Pyrex tube with one end closed and about 18 cm in length, add 2 mL of CHCl 3 and H 2 A mixed solvent composed of O (CHCl 3 and H 2 The volume ratio of O is 1:1), add 2 drops of triethylamine dropwise (at this time the pH value of the solution is 7.2), vacuumize the Pyrex tube, and seal the other end. Place the sealed Pyrex tube at 80°C for 72 hours of heat preservation, take it out, and cool it down to room temperature naturally. Yellow strip crystals can be observed at the bottom of the Pyrex tube. Yield 62%.
[0033] Characterize the product obtained above:
[0034] 1) Crystal structure analysis:
[0035]The yellow strip crystal with perfect surface structure was measured by single crystal diffraction to determine its crystal structure. The obtained crystal structure data is shown in the aforementioned Table 1, and the bond length and b...
Embodiment 2
[0049] Repeat Example 1, the difference is: CHCl in the mixed solvent 3 and H 2 The volume ratio of O was changed to 1:1, and the amount of mixed solvent added was 1 mL.
[0050] After the Pyrex tube was taken out and naturally cooled to room temperature, yellow strip crystals were precipitated at the bottom of the Pyrex tube. Yield 65%.
[0051] Structural characterization of the resulting product was determined to be the target complex [Dy(L) 3 (H 2 O)]. Characterization of the magnetic properties of the obtained product shows that the obtained product exhibits slow relaxation magnetic behavior at low temperature.
Embodiment 3
[0053] Repeat Example 1, the difference is: CHCl in the mixed solvent 3 and H 2 The volume ratio of O was changed to 2:1.
[0054] After the Pyrex tube was taken out and naturally cooled to room temperature, yellow strip crystals were precipitated at the bottom of the Pyrex tube. Yield 60%.
[0055] Structural characterization of the resulting product was determined to be the target complex [Dy(L) 3 (H 2 O)]. Characterization of the magnetic properties of the obtained product shows that the obtained product exhibits slow relaxation magnetic behavior at low temperature.
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