Rare earth europium (III) organic complex light-emitting material and preparation method thereof

A technology of organic complexes and luminescent materials, applied in the field of synthesis of new rare earth luminescent materials, can solve the problems of inferior crystal quality of phosphors, difficult to control particle shape, low luminous efficiency, etc., and achieve easy separation and purification, simple device, fine and uniform particles Effect

Inactive Publication Date: 2014-07-16
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with the traditional method, the luminous efficiency is low, the gap is lar

Method used

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  • Rare earth europium (III) organic complex light-emitting material and preparation method thereof
  • Rare earth europium (III) organic complex light-emitting material and preparation method thereof
  • Rare earth europium (III) organic complex light-emitting material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] Eu(C 14 h 9 o 3 ) 2 (Phen) 2 (NO 3 ) Synthesis of materials:

[0031] Add 0.47mmol (0.106g) of 2-benzoylbenzoic acid, 0.43mmol (0.086g) of 1.10-phenanthroline and 0.21mmol (0.093g) of europium nitrate hexahydrate into a 100mL round-bottomed flask, and use 7mL of A mixed solvent (2:5 by volume) composed of water and N,N'-dimethylformamide was dissolved, and 0.05 mL of a sodium hydroxide solution with a concentration of 1 mol / L was added to the mixed solution. Install a reflux condenser, heat in a water bath with a magnetic constant temperature water bath, control the temperature at 50°C, and react with constant temperature stirring for 8 hours. After the solution is cooled, filter it, cover the filtrate with a layer of microporous fresh-keeping film, place it at room temperature to volatilize naturally, and obtain a colorless crystal product after five weeks. The yield is about 43.1%.

Embodiment 2

[0033] Eu(C 14 h 9 o 3 ) 2 (Phen) 2 (NO 3 ) Synthesis of materials:

[0034]Add 0.40mmol (0.090g) of 2-benzoylbenzoic acid, 0.40mmol (0.080g) of 1.10-phenanthroline and 0.20mmol (0.088g) of europium nitrate hexahydrate into a 100mL round-bottomed flask, and use 8mL of A mixed solvent (volume ratio of 3:5) composed of water and N,N'-dimethylformamide was dissolved, and 0.05 mL of a sodium hydroxide solution with a concentration of 0.8 mol / L was added to the mixed solution. Install a reflux condenser, heat with a magnetic constant temperature water bath, control the temperature at 45°C, and stir at a constant temperature for 9 hours. After the reaction is completed, wait for the solution to cool, filter, and cover a layer of perforated plastic wrap on the mouth of the beaker containing the filtrate. , placed at room temperature to volatilize naturally, and a colorless transparent crystal was obtained after five weeks with a yield of 41%.

Embodiment 3

[0036] Eu(C 14 h 9 o 3 ) 2 (Phen) 2 (NO 3 ) Synthesis of materials:

[0037] Add 0.40mmol (0.090g) of 2-benzoylbenzoic acid, 0.40mmol (0.080g) of 1.10-phenanthroline and 0.18mmol (0.080g) of europium nitrate hexahydrate into a 100mL round-bottomed flask, and use 6mL from A mixed solvent (1:5 by volume) composed of water and N,N'-dimethylformamide was dissolved, and 0.04 mL of a sodium hydroxide solution with a concentration of 1.2 mol / L was added to the mixed solution. Install a reflux condenser, heat with a magnetic constant temperature water bath, control the temperature at 55°C, and stir at a constant temperature for 7 hours. After the reaction is completed, wait for the solution to cool, filter, and cover the mouth of the beaker containing the filtrate with a layer of microporous fresh-keeping The thin film was placed at room temperature to volatilize naturally, and colorless transparent crystals were obtained after five weeks with a yield of 39%.

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Abstract

The invention discloses a rare earth europium (III) organic complex light-emitting material and a preparation method thereof. The material has the following chemical expression formula: Eu(C14H9O3)2(Phen)2(NO3), is of a monoclinic system and has the space group of P2(1)/c and the cell parameters shown in the specification. The material is synthesized of 2-benzoyl benzoic acid, 1.10-phenanthroline and europium nitrate hexahydrate by a one-pot process and is obtained by solvent self-volatilizing and crystallizing The preparation method is simple to operate and mild in reaction condition. The obtained product is high in yield and uniform in crystal particle, can emit strong red fluorescence under the irradiation of ultraviolet light, and can be widely applied to preparation of light emitting devices.

Description

technical field [0001] The invention relates to a rare earth europium (III) organic complex luminescent material and a preparation method thereof, and belongs to the field of synthesis of novel rare earth luminescent materials. Background technique [0002] Rare earth luminescent materials have the advantages of high luminous brightness, long afterglow time, adjustable emission wavelength, no radiation and no pollution, etc. that other luminescent materials do not have. It is an indispensable basic material in the production of plant growth, ultraviolet disinfection, medical care, luminous display and simulated natural light full-spectrum light source, etc.). Rare earth luminescent materials have been widely used in color TV phosphors, phosphors for trichromatic lamps, medical imaging phosphors, computer monitors, nuclear physics, radiation fields, and military affairs. The research on rare earth luminescent materials plays a very important role in transforming the advantag...

Claims

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Application Information

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IPC IPC(8): C07F5/00C09K11/06
Inventor 唐斯萍杨颖群
Owner HENGYANG NORMAL UNIV
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