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Beta-diketone rare earth complex red fluorescent material

A technology of rare earth complexes and red fluorescence, applied in luminescent materials, compounds containing elements of group 3/13 of the periodic table, chemical instruments and methods, etc., can solve the problem of insufficient luminous efficiency and thermal stability of rare earth complex luminescent materials problem, to achieve the effect of improving luminous efficiency and thermal stability, low production cost, and simple process

Inactive Publication Date: 2014-04-02
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 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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  • Beta-diketone rare earth complex red fluorescent material
  • Beta-diketone rare earth complex red fluorescent material
  • Beta-diketone rare earth complex red fluorescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Rare earth complex polycrystalline powder Eu(BTA) 3 Preparation of (DFA):

[0029] A. Weigh 1mmol of Eu(NO 3 ) 3 ·6H 2 0 and 3mmol of benzoyltrifluoroacetone were added to dissolve in 15ml of acetonitrile, and 6ml of 0.5mol / L sodium hydroxide solution was added dropwise, fully stirred to obtain a clear solution 1;

[0030] B. Weigh 1mmol of 4,5-diazafluorene, add 7ml of acetonitrile to dissolve, and obtain a colorless and clear solution 2;

[0031] C. Slowly add solution 2 dropwise to solution 1, and stir at room temperature for 1 hour to obtain solution 3;

[0032] D. Evaporate solution 3 under reduced pressure, wash with water, and dry to obtain powdery rare earth complex luminescent material Eu(BTA) 3 (DFA), yield 83%.

[0033] For rare earth complexes Eu(BTA) 3 (DFA) phase-pure powders were subjected to a series of performance tests. For the rare earth Eu of the present invention 3+ The steady-state fluorescence test of the polycrystalline powder of the lum...

Embodiment 2

[0035] Rare earth complex Eu(BTA) 3 (DFA) single crystal acquisition and characterization:

[0036] Take a small amount of rare earth complex Eu(BTA) 3(DFA) The solid product was dissolved with acetonitrile to obtain a saturated solution A, and deionized water, deionized water and acetonitrile buffer solution, and solution A were added successively in a test tube. After standing still for several days, a colorless and transparent block crystal was obtained. A single crystal with a size of 0.32x0.23x0.20mm was selected for X-ray single crystal diffraction, and Eu(BTA) was obtained by analysis. 3 (DFA) 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 beta-diketone rare earth complex red fluorescent material as well as a preparation and an application thereof. The rare earth complex is a luminous material with excellent performance and has a molecular structure of Eu(BTA)3(DFA), wherein BTA is benzoyltrifluoroacetone; DFA is 4,5-diazafluoren. The luminous material is prepared by carrying out a coordination reaction among europium nitrate, BTA and DFA. The specific preparation method comprises the following steps: reacting the europium nitrate, BTA and DFA in a mixed solution of acetonitrile and water according to a stoichiometric ratio of 1:3:1, adding a proper amount of sodium hydroxide to remove a proton of BTA, performing reduction vaporization, washing and drying to obtain a target product. The complex is high in dissolution performance, high in luminous efficiency and high in heat stability and can be applied to 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] China has the most abundant rare earth resources in the world, and the variety is complete, which provides a huge guarantee for the application of rare earth luminescent materials. At present, the research and development of rare earth luminescent materials has covered the entire luminescent field, and a certain industrial production scale and market have been formed. Rare earth luminescent materials have become the leading luminescent materials. 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 electron la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07F5/00
Inventor 柴文祥张小丽洪明卫夹国华秦来顺史宏声舒康颖徐凯杰陈孝炯黄绵吉赵毅田园
Owner CHINA JILIANG UNIV
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