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Red rare earth fluorescence material and preparation method thereof

A rare earth fluorescent material and rare earth technology, applied in the fields of luminescent materials, carboxylate preparation, carboxylic acid amide preparation, etc., can solve the problems of reduced fluorescence quantum efficiency, no light emission, etc., and achieve easy separation and purification, high energy level matching degree, The effect of reducing energy loss

Active Publication Date: 2016-02-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current red light materials, there are strong charge transfer characteristics and strong π-π interaction, and the concentration quenching effect is easy to occur in the thin film state or at a high concentration, resulting in a decrease in fluorescence quantum efficiency or even no light emission. Further research is needed. Improve and increase fluorescence intensity

Method used

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  • Red rare earth fluorescence material and preparation method thereof
  • Red rare earth fluorescence material and preparation method thereof
  • Red rare earth fluorescence material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh 0.2583g of europium chloride and dissolve it in 10ml of 95% absolute ethanol solution.

[0022] (2) According to the stoichiometric ratio, 0.4565 g of o-methoxybenzoic acid was weighed and dissolved in 15 ml of 95% absolute ethanol solution.

[0023] (3) According to the stoichiometric ratio, weigh 0.2580 g of 1.0 GPAMAM and dissolve it in 10 ml of 95% absolute ethanol solution.

[0024] (4) Add the solution obtained in (2) dropwise into the solution obtained in (3) under electromagnetic stirring, and continue stirring for 10 min to obtain a ligand mixed solution.

[0025] (5) Configure 10% sodium ethylate solution.

[0026] (6) Under the condition of electromagnetic stirring, the ethanol solution of europium chloride obtained in (1) was added dropwise at a rate of 1 drop / s to the ligand mixture obtained in (4), and a precipitate was formed. Use 10% sodium ethoxide solution to adjust the pH value to 7. At this time, a large amount of white precipitates are p...

Embodiment 2

[0030] (1) Weigh 0.2583g of europium chloride and dissolve it in 10ml of 95% absolute ethanol solution.

[0031] (2) According to the stoichiometric ratio, 0.4565 g of o-methoxybenzoic acid was weighed and dissolved in 15 ml of 95% absolute ethanol solution.

[0032] (3) According to the stoichiometric ratio, weigh 0.1935 g of 1.0 GPAMAM and dissolve it in 10 ml of 95% absolute ethanol solution.

[0033] (4) Add the solution obtained in (2) dropwise into the solution obtained in (3) under electromagnetic stirring, and continue stirring for 10 min to obtain a ligand mixed solution.

[0034] (5) Configure 10% sodium ethylate solution.

[0035] (6) Under the condition of electromagnetic stirring, the ethanol solution of europium chloride obtained in (1) was added dropwise at a rate of 1 drop / s to the ligand mixture obtained in (4), and a precipitate was formed. Use 10% sodium ethoxide solution to adjust the pH value to 7. At this time, a large amount of white precipitates are p...

Embodiment 3

[0039] (1) Weigh 0.2583g of europium chloride and dissolve it in 10ml of 95% absolute ethanol solution.

[0040] (2) According to the stoichiometric ratio, 0.4565 g of o-methoxybenzoic acid was weighed and dissolved in 15 ml of 95% absolute ethanol solution.

[0041] (3) According to the stoichiometric ratio, weigh 0.3870 g of 1.0 GPAMAM and dissolve it in 15 ml of 95% absolute ethanol solution.

[0042] (4) Add the solution obtained in (2) dropwise into the solution obtained in (3) under electromagnetic stirring, and continue stirring for 10 min to obtain a ligand mixed solution.

[0043] (5) Configure 10% sodium ethylate solution.

[0044] (6) Under the condition of electromagnetic stirring, the ethanol solution of europium chloride obtained in (1) was added dropwise at a rate of 1 drop / s to the ligand mixture obtained in (4), and a precipitate was formed. Use 10% sodium ethoxide solution to adjust the pH value to 7. At this time, a large amount of white precipitates are p...

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Abstract

The invention relates to a preparation method of a red rare earth fluorescence material, and belongs to the field of luminescent materials. The method comprises the steps that rare earth europium is taken as a luminescent central ion, o-methoxybenzoic acid which is high in rigidity and good in conjugacy is adopted as a first ligand, and polyamide-amine dendrimer which is good in energy transfer effect and is of a three-dimensional structure is taken as a second ligand; the first ligand and the second ligand are matched with trivalent europium ions according to the mole ratio of 3:0.5 and react with the trivalent europium ions in a 95% absolute ethyl alcohol solution with the PH value of 6.5-7.5, ageing is performed for 4-5 hours, and then the solid red luminescent material is synthesized. According to the prepared material, the luminescent intensity is 2.5 times of that of binary complexes of the PAMAM under the same testing conditions and is 1.3 times of that of ternary complexes of phenanthroline serving as the second ligand under the same testing conditions.

Description

Technical field: [0001] The invention belongs to the field of luminescent materials, and in particular relates to a red rare earth organic-inorganic complex fluorescent material and a preparation method thereof. Background technique: [0002] The various energy level structures and transition modes of rare earth ions make them attract special attention in the field of luminescence. Rare earth luminescent materials are used in many areas of life, such as trichromatic fluorescent lamps, X-ray sensitive paper, color display screens, and white fluorescent lamps. Rare earth photoluminescent materials are the hotspots of current international frontier research. In the current red light materials, there are strong charge transfer characteristics and strong π-π interaction, and the concentration quenching effect is easy to occur in the thin film state or at a high concentration, resulting in a decrease in the fluorescence quantum efficiency or even no light emission. Further resear...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07F5/00C07C237/10C07C231/12C07C65/21C07C51/347
Inventor 陈灵芝叶亚平王明文陶坤王一旭周厚博
Owner UNIV OF SCI & TECH BEIJING
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