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Preparation of purple light-excited tri-stimulus composite white light complexes

A complex and three-color technology, which is applied in the field of preparation of three-color composite white light complexes, can solve the problems of high price and poor light stability, and achieve the effect of simple preparation method, high stability and high thermal stability

Inactive Publication Date: 2013-12-18
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

β-diketone, o-phenanthroline, bipyridine, etc. are bidentate ligands, which can form stable six-membered ring chelates with rare earth ions, and have efficient energy transfer with central ions, and are rare earth luminescent complexes. Good ligands, but most species are expensive and have poor photostability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 0.534 g (3.0 mmol) of p-tert-butylbenzoic acid, add 50 mL of distilled water, and stir magnetically at 60 °C to dissolve it. Slowly add 1 mol / L NaOH solution under stirring until the pH value of the solution is 7.0, and continue stirring and saponification at 60°C for 0.5 hour. Add 10 mL 0.1 mol / L Eu(NO 3 ) 3 Solution, there is white precipitate, continue to stir and react at 60 ℃ for 2 hours, and let it stand at room temperature for 12 hours. The white solid product is filtered by suction, washed 3 times with water, dried at 90 ℃, and rolled into powder to obtain red light compound things.

[0023] Weigh 0.366 g (3.0 mmol) of benzoic acid, add 50 mL of distilled water, and stir magnetically at 60 °C to dissolve it. Slowly add 1 mol / L NaOH solution under stirring until the pH value of the solution is 7.5, and continue stirring and saponification at 60°C for 0.5 hour. Add 10 mL 0.1 mol / L Tb(NO 3 ) 3 Solution, there is white precipitate, continue to stir and r...

Embodiment 2

[0027] Weigh 0.366 g (3.0 mmol) of benzoic acid, add 50 mL of distilled water, and stir magnetically at 65 °C to dissolve it. Slowly add 2 mol / L NaOH solution under stirring until the pH value of the solution is 7.5, and continue stirring and saponification at 65°C for 0.5 hour. Then dropwise add 5 mL 0.1 mol / L Eu(NO 3 ) 3 and 5 mL 0.1 mol / L La(NO 3) 3 The mixed solution of , with white precipitates, was stirred and reacted at 65°C for 1.5 hours, and then left to stand at room temperature for 18 hours. The white solid product was filtered with water, washed 3 times with water, dried at 100°C, and rolled into powder to obtain Red complexes.

[0028] Weigh 0.456 g (3.0 mmol) of p-methoxybenzoic acid, add 50 mL of distilled water, and stir magnetically at 65 °C to dissolve it. Slowly add 2 mol / L NaOH solution under stirring until the pH value of the solution is 7.5, and continue stirring and saponification at 65°C for 0.5 hour. Then dropwise add 5 mL 0.1 mol / L Tb(NO 3 ) 3...

Embodiment 3

[0032] Weigh 0.534 g (3.0 mmol) of p-tert-butylbenzoic acid, add 60 mL of 50% ethanol, and stir magnetically at 70 °C to dissolve it. Slowly add 1.5 mol / L NaOH solution under stirring until the pH value of the solution is 7.0, and continue stirring and saponification at 70°C for 0.5 hour. Then add 4 mL 0.1 mol / L EuCl dropwise 3 solution and 6 mL 0.1 mol / L LaCl 3 The mixed solution of the mixed solution produced a white precipitate. Continue to stir the reaction at 70°C for 1 hour, and let it stand at room temperature for 12 hours. The white solid product is filtered by suction, washed 3 times with water, dried at 90°C, and rolled into a powder to obtain a red Photocomplexes.

[0033] Weigh 0.534 g (3.0 mmol) of p-tert-butylbenzoic acid, add 60 mL of 50% ethanol, and stir magnetically at 60 °C to dissolve it. Slowly add 1.5 mol / L NaOH solution under stirring until the pH value of the solution is 7.0, and continue stirring and saponification at 60°C for 0.5 hour. Add 4 mL 0....

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Abstract

The invention belongs to the technical fields of a luminescent material and displaying, and particularly relates to preparation of purple light-excited tri-stimulus composite white light complexes. The preparation comprises the following steps: by utilizing non-fluorescent rare earth-co-doped rare earth Eu and Tb, and taking aromatic carboxylic acid or aromatic carboxylic acid and beta-diketone combination as ligands; respectively preparing a red-light complex and a green-light complex; simultaneously preparing a blue-light complex by taking aromatic carboxylic acid lanthanum as a blue-light component; mixing the red-light complex, the green-light complex and the blue-light complex according to the weight ratio of (0.5-4):(1):(1-5), so as to obtain the tri-stimulus composite white light complexes. The tri-stimulus composite white light complexes emit white lights under excitation of the purple light; the compound ratio of the tri-stimulus complexes is properly changed; chromaticity coordinates of the complexes also can be regulated according to the requirements. The preparation disclosed by the invention is simple in preparation method, mild in preparation condition, high in thermal stability, excellent in luminescence property, and low in price, is a rare-earth organic luminescent material with a great prospect, and can be applied to the fields of lighting and displaying.

Description

[0001] technical field [0002] The invention belongs to the technical field of luminescent materials and displays, and in particular relates to the preparation of a three-primary-color composite white-light complex excited by purple light. Background technique [0003] Rare earth has a special outer electronic structure, which makes it have unique optical, electrical, magnetic and other properties, especially luminous performance. The field has a wide range of applications. White light emission can be achieved by combining several luminescent materials with complementary color luminescence, the most commonly used is the combination of the three primary colors of red, green and blue or the combination of yellow and blue. Emitters with rare earth ions as activators (luminescent centers) are the most important type of luminescent materials, and the most important rare earth ions as activators are red-emitting Eu 3+ Ionic, green-emitting Tb 3+ ions and blue-emitting Eu 2+ i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07F5/00
Inventor 林美娟凌启淡王文
Owner FUJIAN NORMAL UNIV
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