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Rare earth complex luminescent material and preparation method thereof

A technology of rare earth complexes and luminescent materials, applied in the field of rare earth luminescent materials and rare earth complex luminescent materials, can solve the problems of insufficient luminous efficiency and thermal stability of rare earth complex luminescent materials, and achieve improved luminous efficiency and thermal stability, The effect of low production cost and simple raw materials

Inactive Publication Date: 2013-03-13
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the luminous efficiency and thermal stability of rare earth complex luminescent materials are not high enough, which is still a key problem restricting their application in important fields such as organic electroluminescence.

Method used

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  • Rare earth complex luminescent material and preparation method thereof
  • Rare earth complex luminescent material and preparation method thereof
  • Rare earth complex luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Rare earth complex Eu(BTA) 3 The preparation of (PBO) is realized by following four steps:

[0028] A. Weigh 0.5mmol of Eu(NO 3 ) 3 ·6H 2 0 and 1.5mmol of benzoyltrifluoroacetone, add 10ml of acetonitrile for dissolving, and add 7.5ml of 0.2mol / L sodium hydroxide solution dropwise, fully stir to obtain clear solution 1;

[0029] B. Weigh 0.5mmol 2-(2-benzoxazole)pyridine, add 5ml acetonitrile to dissolve, and obtain light-colored clear solution 2;

[0030] C. Slowly add solution 2 dropwise to solution 1, and stir at room temperature for 1 hour to obtain solution 3;

[0031] D. Remove the solvent by rotary evaporation of solution 3 under reduced pressure to obtain a powdery product, which is finally washed with deionized water and dried at 50°C to obtain the rare earth complex luminescent material Eu(BTA) 3 (PBO), yield 84%.

[0032] For the complex Eu(BTA) 3 (PBO) phase-pure powder samples were subjected to a series of performance tests. Thermogravimetric analys...

Embodiment 2

[0034] Obtaining and characterization of rare earth complex Eu(BTA)3(PBO) single crystal:

[0035] Take a small amount of rare earth complex Eu(BTA) 3 (PBO) solid product is dissolved with acetonitrile to obtain a saturated solution, then add n-butanol (the volume ratio of n-butanol and acetonitrile is 1: 1) to the solution, leave it for several days to obtain a colorless transparent block crystal, Select a single crystal with a size of 0.20×0.18×0.13mm for X-ray single crystal diffraction, and analyze Eu(BTA) 3(PBO) molecular structure. The molecular structure of the compound is shown in the attached figure 1 .

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Abstract

The invention relates to a novel rare earth ternary complex. The rare earth complex is a rare earth luminescent material with high performance; and the molecular formula of the complex is Eu(BTA)3(PBO)[BTA is benzoyltrifluoroacetone, and PBO is 2-(2-benzoxazole) pyridine]. The compound is prepared by performing complexing reaction on nitrate of tervalence rare earth ion Eu<3+> and three-time equivalent benzoyltrifluoroacetone ligand and one-time equivalent 2-(2-benzoxazole) pyridine ligand. The preparation method comprises the following steps of: reacting the rare earth nitrite, benzoyltrifluoroacetone and 2-(2-benzoxazole) pyridine in an acetonitrile solvent according to a chemical metering ratio of 1: 3: 1; dipping a sodium hydroxide solution to regulate a PH value; and rotationally evaporating, washing and drying to obtain a product. The rare earth complex is good in dissolubility, high in luminescence efficiency and good in heat stability, and can be applied to red light luminescent materials in the field of photoluminescence or electroluminescence.

Description

technical field [0001] The invention relates to the field of rare earth luminescent materials, in particular to the field of rare earth complex luminescent materials. Background technique [0002] my country's rare earth mineral resources are very rich, the total reserves account for more than 40% of the world, and the variety is complete, which provides a huge guarantee for the application of rare earth compounds. Rare earth compounds are widely used, and they have very important applications in agriculture, industry, and medicine. Therefore, actively developing high-tech rare earth products and transforming my country's rare earth resource advantages into technological competitive advantages are of great significance for promoting my country's industrial transformation and upgrading, as well as enhancing international competitiveness. [0003] Due to their special electronic shell structure, rare earth ions exhibit many unique properties, so they are widely used in the fi...

Claims

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Application Information

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IPC IPC(8): C07F5/00C09K11/06H01L51/54
Inventor 柴文祥张小丽夹国华郭驾宇史宏声秦来顺陈达范美强舒康颖
Owner CHINA JILIANG UNIV
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