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Rare earth aromatic carboxylic acid organic complex and preparation thereof

A technology of organic complexes and aromatic carboxylic acids, which is applied in the field of rare earth aromatic carboxylic acid complexes and their synthesis, can solve the problems of narrow application range, single luminous color of luminescent complexes, poor solubility of rare earth organic complexes, etc., and achieve Good stability and luminous performance, simple and easy process route, good thermal stability

Inactive Publication Date: 2008-11-12
BEIJING UNIV OF CHEM TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Document 1, Lin Qin, Fu Lianshe, Liang Yujun. Synthesis of novel rare earth aromatic carboxylic acid complexes and their photoluminescent and electroluminescent properties [J]. Chinese Journal of Rare Earth, 2003, 21(1): 19-23. Introduction rare earth (Eu 3+ , Tb 3+ ) Aromatic carboxylic acid solid complexes are a class of luminescent materials with high stability and high luminous intensity, but the enhancement effect of photoluminescence and electroluminescence intensity is not obvious, and the solubility of the synthesized rare earth organic complexes is not good.
[0005] Document 2, Qian Guodong, Wang Minquan. Rare earth (Eu 3+ , Tb 3+ ) Synthesis, characterization and fluorescence properties of nitrogen-containing heterocyclic complexes[J]. Chinese Journal of Luminescence, 1998, 19(1): 60. 3+ , Tb 3+ ) synthesis, characterization and fluorescence properties of nitrogen-containing heterocyclic complexes. So far, the research work in this direction is still extensively carried out, but the main problem in the study of this kind of rare earth aromatic carboxylic acid luminescent complexes is that rare earth aromatic carboxylic acid luminescence The thermal stability, sublimation, and solubility of the complex itself affect the brightness of its photoluminescence and electroluminescence devices. At the same time, the light-emitting color of rare earth aromatic carboxylic acid light-emitting complexes is relatively single, and the application range is narrow

Method used

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  • Rare earth aromatic carboxylic acid organic complex and preparation thereof
  • Rare earth aromatic carboxylic acid organic complex and preparation thereof
  • Rare earth aromatic carboxylic acid organic complex and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A Press RE(3,5-DNBA) 3 Phen expression theoretical measurement, respectively take 0.1mol.L -1 EuCl 3 Add 0.1mol.L of ethanol solution 10ml under stirring -1 10ml of 1,10-Phen ethanol solution;

[0028] B. Then heat in a 60°C water bath, and slowly drop in 0.1mol.L under constant stirring -1 3,5-DNBA ethanol solution 30ml;

[0029] C. Adjust the pH value to 6.5 with triethylamine to produce a white precipitate. Let the above reactant stand at room temperature for 24 hours, let it mature, filter it with suction, and wash the precipitate with 95% ethanol until there is no Cl - , dried in a 70°C oven to obtain a white solid rare earth organic complex Eu(3,5-DNBA) 3 Phen.

[0030] In the rare earth organic complex Eu(3,5-DNBA) 3 Doped Nano TiO in Phen 2 , to improve the luminous intensity of rare earth organic complexes. The first is to prepare the light-emitting layer of the device, that is, the rare earth complex Eu(3,5-DNBA) 3 Phen, polymer PVK (polyvinylcarbaz...

Embodiment 2

[0032] A Press RE(3,5-DNBA) 3 Phen expression theoretical measurement, respectively take 0.2mol.L -1 TbCl 3 Ethanol solution 10ml, add 0.2mol.L under stirring -1 10ml of 1,10-Phen ethanol solution;

[0033] B. Heat to a constant temperature in a water bath at 62°C, and slowly add 0.2mol.L dropwise under constant stirring -1 m-NBA ethanol solution 30ml;

[0034] C. Adjust the pH value to 6.8 with triethylamine to produce a white precipitate. Let the above reactant stand at room temperature for 20 hours, let it mature, filter it with suction, and wash the precipitate with 95% ethanol until there is no Cl - , dried in an oven at 65°C to obtain the white solid rare earth organic complex Tb(3,5-DNBA) 3 Phen.

Embodiment 3

[0036] A Press RE(3,5-DNBA) 3 Phen expression theoretical measurement, respectively take 0.25mol.L -1 EuCl 3 Ethanol solution 10ml, add 0.25mol.L under stirring -1 10ml of 1,10-Phen ethanol solution;

[0037] B. Heat to a constant temperature in a water bath at 62°C, and slowly drop in 0.25mol.L under constant stirring -1 m-NBA ethanol solution 30ml;

[0038] B Use triethylamine to adjust the pH value to 7.0 to produce a white precipitate, let the above reactant stand at room temperature for 23 hours, let it mature, filter it with suction, and wash the precipitate with 95% ethanol until there is no Cl - , dried in an oven at 66°C to obtain a white solid rare earth organic complex Eu(3,5-DNBA) 3 Phen.

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Abstract

The invention relates to rare earth aromatic carboxylic acid organic complexes. The structural general formula of the complexes is shown in formula (I), wherein RE is equal to Eu<3+> or Tb<3+>; 1 represents 1, 10-o-phenanthroline (1, 10-Phen); and 2 represents 3, 5-dinitrobenzoic acid (3, 5-DNBA). The chemical name of formula (I) is europium or terbium 3, 5-dinitrobenzoic acid-o-phenanthroline organic complexes, and the chemical formula of the organic complexes is RE (3, 5-DNBA)3 Phen; moreover, the rare earth organic complexes has excellent thermal stability. In addition, the invention also relates to a method for making the rare earth aromatic carboxylic acid organic complexes, and the technological line for making the organic complexes is simple and easy to carry out.

Description

technical field [0001] The invention relates to the technical field of rare earth organic luminescent materials, in particular to a rare earth aromatic carboxylic acid complex and a synthesis method thereof. The rare earth aromatic carboxylic acid complex has photoluminescence and electroluminescence properties. Background technique [0002] Rare earth luminescent materials can be divided into photoluminescence, cathodoluminescence, X-ray luminescence, and electroluminescence materials, etc., and have great application value in the fields of laser, photoluminescence, and electroluminescence complexes. [0003] Organic carboxylic acids mainly refer to various aromatic carboxylic acids, among which benzoic acid and its various derivatives are the main ones. Because carboxylic acid complexes have many similarities, there have been many reports on their synthesis and properties at home and abroad. Its application research is also increasing day by day. Rare earth (Eu 3+ , Tb ...

Claims

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Application Information

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IPC IPC(8): C07F5/00C09K11/06
Inventor 张敬畅吕玉光曹维良
Owner BEIJING UNIV OF CHEM TECH
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