Rare earth complex coated with silicon dioxide and preparation method of rare earth complex

A technology of rare earth complexes and silica, applied in the field of rare earth complexes, can solve problems such as affecting the fluorescence properties of rare earth complexes, and achieve the effects of solving stability, improving stability and improving stability

Inactive Publication Date: 2011-08-17
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires the selection of appropriate ligands, because acrylic acid monomers determine its spatial structure and must select appropriate ligands to form complexes.
Generally speaking, it is difficult for ligands with relatively large molecular weight to form rare earth complexes with them, which affects the fluorescence properties of the final rare earth complexes to a certain extent.

Method used

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  • Rare earth complex coated with silicon dioxide and preparation method of rare earth complex
  • Rare earth complex coated with silicon dioxide and preparation method of rare earth complex
  • Rare earth complex coated with silicon dioxide and preparation method of rare earth complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Rare earth complex Eu(TTA) 3 Preparation of phen

[0034] Will Eu 2 o 3 (purity 99.99%) dissolved in dilute hydrochloric acid, cooled after slow evaporation, white crystal EuCl precipitated 3 ·6H 2 O, put into desiccator after filtering and dry for subsequent use. 1mmol EuCl 3 .6H 2 O and 3 mmol of 2. Thiophene trifluoroacetylacetone (TTA) was dissolved in 20 mL of absolute ethanol. Then, 3 mmol of triethylamine (0.42 mL) was added. Finally, 1 mmol of phenanthroline (phen) was added, and a white precipitate was formed. After stirring for 0.5 h, the precipitate was suction-filtered, washed with absolute ethanol for several times, and then suction-filtered again, and put into a desiccator to dry for later use.

[0035] The 2 elemental analysis results of the sample are shown in Table 1, and Eu(TTA) 3 The theoretical value calculated by phen is consistent; its emission spectrum at an excitation wavelength of 383nm is as follows figure 1 As shown, the excitation ...

Embodiment 2

[0039] SiO2 Coated Rare Earth Complex SiO 2 / Eu(TTA) 3 Preparation of phen

[0040] 0.2g of Eu(TTA) 3 phen and 2 mL of TEOS were dispersed in 20 mL of isopropanol. The solution was placed in a sonicator for ultrasonic treatment for 1 h, then the solution was transferred to a flask for electric stirring, and the stirring rate was maintained at 3000 n / min. Add 1 mL of ammonia water (28%), 1 mL of deionized water and 5 mL of isopropanol mixture into the flask at one time, continue to stir for 20 h, then centrifuge the product and wash it several times with isopropanol. The product was dried at 80°C for 12 hours to obtain the final product.

[0041] The mass of the final product was weighed to be 0.3 g. This shows that about 0.1g is due to the silica coated in Eu(TTA) 3 phen surface results.

[0042] The secondary elemental analysis results of this final product are shown in Table 2, and its C, H, N element content ratio Eu(TTA) 3 The corresponding value in phen has been r...

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Abstract

The invention provides a rare earth complex coated with silicon dioxide and a preparation method of the rare earth complex, wherein the rare earth complex is a particle product formed by using the rare earth complex as a nuclear body and using the silicon dioxide generated after a silicon dioxide precursor is hydrolyzed as a surface coating object. A fluorescence test shows that the fluorescence intensity of the coated rare earth complex is obviously strengthened. Meanwhile, the obtained rare earth complex has the characteristic that the rare earth complex coated with the silicon dioxide is insoluble in an organic solvent. By adopting the method, the cost of rare earth can be reduced to the great extent.

Description

technical field [0001] The invention provides a silicon dioxide-coated rare earth complex, which is a granular substance formed by using the rare earth complex as a nucleus, and the silicon dioxide formed after the hydrolysis of a silicon dioxide precursor as a surface coating, and its Preparation. Fluorescence test shows that the fluorescence intensity of the coated rare earth complex has been enhanced. The obtained rare earth complex has the characteristic of being insoluble in organic solvents. Background technique [0002] my country is rich in rare earth resources, and the deep processing of rare earth resources to produce new functional materials with high added value has important scientific value and practical significance. Rare earth complexes have unique advantages as luminescent materials, such as high internal quantum efficiency, emission peak width at half maximum of about 10nm, and high color purity. Rare earth complexes have special applications in anti-cou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00C09K11/06H01L33/26G01N21/64G09F3/00
Inventor 陶栋梁崔玉民徐怡庄
Owner FUYANG NORMAL UNIVERSITY
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