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A tetranuclear rare earth terbium complex and its preparation method and application as a luminescent material

A technology of terbium complexes and luminescent materials, applied in luminescent materials, organic chemical methods, chemical instruments and methods, etc., can solve the problems of poor crystal quality of phosphors, difficulty in controlling particle shape, low luminous efficiency, etc., and achieve good crystallization performance , mild reaction conditions and high purity

Active Publication Date: 2020-10-16
HENGYANG NORMAL UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with the fluorescent materials prepared by traditional methods, the luminous efficiency is low, the gap is large, the crystal quality of the phosphor is inferior, and the shape of the particles is difficult to control.

Method used

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  • A tetranuclear rare earth terbium complex and its preparation method and application as a luminescent material
  • A tetranuclear rare earth terbium complex and its preparation method and application as a luminescent material
  • A tetranuclear rare earth terbium complex and its preparation method and application as a luminescent material

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 0.81 mmol (0.134 g) of phthalic acid and 10 ml of water were added to a 50 mL beaker, and a sodium carbonate solution with a concentration of 1 mol / L was added to adjust the pH of the solution to 5. Add 0.30mmol (0.139g) terbium nitrate hexahydrate to this mixed solution, stir, filter, and transfer the filtrate to a 20ml glass test tube. A mixed solvent composed of water and ethanol (volume ratio 1:2) and an ethanol solution in which 1.497 mmol (0.230 g) of 2,2'-bipyridine was dissolved were added above the filtrate. Cover the mouth of the test tube with a preservative film with small holes, and let it stand at room temperature. After three weeks, a colorless crystal product is obtained, and the yield is about 40.3%.

[0038] Crystal Structure Determination of Tetranuclear Rare Earth Terbium Complex:

[0039] Select a single crystal with a size of 0.22x 0.20x 0.15mm, place it on a Bruker APEX-II CCD single crystal diffractometer for diffraction experiments, use CuKα ra...

Embodiment 2

[0047] Add 0.65 mmol (0.107 g) of phthalic acid and 10 ml of water into a 50 mL beaker, and add a sodium carbonate solution with a concentration of 1 mol / L to adjust the pH of the solution to 6. Add 0.40mmol (0.185g) terbium nitrate hexahydrate to this mixed solution, stir, filter, and transfer the filtrate to a 20ml glass test tube. A mixed solvent composed of water and ethanol (volume ratio 1:2) and an ethanol solution in which 1.497 mmol (0.230 g) of 2,2'-bipyridine was dissolved were added above the filtrate. Cover the mouth of the test tube with a preservative film with small holes, and let it stand at room temperature. After three weeks, a colorless crystal product is obtained, and the yield is about 38.5%.

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Abstract

The invention discloses a four-core rare earth terbium compound as well as a preparation method and application thereof as luminescent materials. The four-core rare earth terbium compound has the following chemical expression of Tb4(2,2'-bipy)2(C8H4O4)6(H2O)4. According to the preparation method, after the pH of a phthalic acid water solution is regulated to 5 to 6, terbium salt is added for reaction; solid-liquid separation is performed; alcohol-water mixed solvents and 2,2'-dipyridinyl alcohol solution are added into the obtained liquid phase after the solid-liquid separation; by using a diffusion method, a four-core rare earth terbium compound crystal is obtained. The four-core rare earth terbium compound has the photoluminescence performance; the characteristics of high luminescence intensity, good monochromaticity, high stability and the like are realized. The preparation method has the advantages that the conditions are mild; the operation is simple; the industrial production isfacilitated.

Description

technical field [0001] The invention relates to a luminescent material, in particular to a tetranuclear rare earth terbium complex and a preparation method thereof, and also relates to the application of the tetranuclear rare earth terbium complex as a photoluminescent material, belonging to the technical field of luminescent materials. Background technique [0002] my country is the country with the most abundant rare earth resources in the world, accounting for 80% of the world's reserves. Rare earth is known as the "gold" of industry. Because of its excellent optical, electrical, magnetic and other physical properties, it can be combined with other materials to form a variety of materials with different properties. new profile material , its most notable function is to substantially improve the quality and performance of other products. [0003] According to the luminescent properties and electronic transition properties of rare earth ions, rare earths can be divided i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00C09K11/06
CPCC07B2200/13C07F5/003C09K11/06C09K2211/182
Inventor 杨颖群
Owner HENGYANG NORMAL UNIV
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