Eu-(TTA)3-1,10-phen/SiO2 core/shell type nano composite fluorescent material

A technology of trifluoroacetylacetone and phenanthroline, which is applied in the field of composite fluorescent material preparation, can solve the problems of weakened fluorescence emission intensity, loss of fluorescence performance, poor stability of photoluminescent materials, etc. Ultraviolet absorption performance, low price effect

Inactive Publication Date: 2009-10-21
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0003] The object of the present invention is to provide a kind of europium-(trifluoroacetylacetonate) 3 -1,10-phenanthroline/silica core/shell nanocomposite fluorescent material, which solves Eu(TTA) 3 Phe

Method used

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  • Eu-(TTA)3-1,10-phen/SiO2 core/shell type nano composite fluorescent material
  • Eu-(TTA)3-1,10-phen/SiO2 core/shell type nano composite fluorescent material
  • Eu-(TTA)3-1,10-phen/SiO2 core/shell type nano composite fluorescent material

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Embodiment Construction

[0016] First, weigh 1 mmol of europium trichloride crystals and 3 mmol of organic ligand trifluoroacetylacetone, and dissolve these two substances in 30 mL of ethanol solution, and filter if there are insoluble impurities. Then, 3 mmol triethylamine was added to the above solution under constant stirring. Finally, 1 mmol of the second ligand 1,10-phenanthroline was added under the condition of constant stirring, and a white precipitate was formed. After stirring continuously for a period of time, the filter cake obtained by suction filtering the precipitate with a sandboard funnel is the product rare earth complex. In order to clean the unreacted raw materials attached to the product, the generated rare earth complex can be washed several times with ethanol or water, then suction filtered, and dried for later use.

[0017] Measure 100mL absolute ethanol, 0.5g Eu(TTA) 3 Put phen and 1.1mL tetraethyl orthosilicate in a beaker, ultrasonically oscillate for 20min, and mix evenly...

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Abstract

The invention relates to an Eu-(TTA)3-1,10-phen/SiO2 core/shell type nano composite fluorescent material belonging to the preparation field of composite fluorescent materials. TTA is used as a first ligand and phen is used as a second ligand to prepare Eu-(TTA)3phen ligand which is the novel photoluminescence material and is hydrolyzed under the function of base catalyst by TEOS, and a layer of SiO2 shell is formed on the surface of a rare-earth composition so as to obtain rare-earth ligand nano particles with stable fluorescence intensity. The invention has the advantages of simple preparation process, low cost of raw materials, reaction at normal temperature and low energy consumption. Because the SiO2 shell is separated from oxygen and water in the air, compared with the Eu-(TTA)3phen fluorescent material, the Eu-(TTA)3phen/SiO2 core/shell type nano composite fluorescent material has greatly improved stability under the ultraviolet irradiation, strengthened fluorescent emission intensity and better UV absorptivity.

Description

technical field [0001] The invention belongs to the field of preparation of composite fluorescent materials, and in particular provides a europium-(trifluoroacetylacetonate) 3 -1,10-phenanthroline / silicon dioxide core / shell nanocomposite fluorescent material. Background technique [0002] Rare earth elements have a unique 4f outer electron layer structure, and their compounds exhibit many excellent optical, electrical, and magnetic properties, especially rare earth elements have spectral properties that cannot be compared with ordinary elements, so the application of rare earth luminescent materials is particularly attractive Attention. Now, rare earth luminescence involves almost the entire field of solid-state luminescence. Rare earth luminescent materials are widely used in the three major fields of lighting, display and detection, forming a huge industrial production and consumer market scale, and are expanding to other emerging technology fields, and the research on t...

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Application Information

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IPC IPC(8): C09K11/06
Inventor 郭广生赵雷
Owner BEIJING UNIV OF CHEM TECH
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