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Binuclear double-ligand rare earth composite fluorescent material and preparation method thereof

A composite fluorescence and rare earth complex technology, applied in the field of fluorescent materials, can solve the problems of poor light and thermal stability, difficult recovery of rare earth complexes, etc.

Pending Publication Date: 2020-03-17
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Fluorescent materials of rare earth complexes have the advantages of unique molecular structure, photoluminescence mechanism, strong fluorescence and good monochromaticity, and are applied in many fields such as industry, agriculture, biology, etc., but their light and thermal stability are slightly poor. Moreover, in recent years, because rare earths have gradually been used as strategic resources, more and more attention has been paid to them. Therefore, the price of rare earths has continued to rise, and it is difficult to recycle rare earth complexes after use, which has led to greater restrictions on the application of rare earth complexes in many aspects limitations

Method used

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  • Binuclear double-ligand rare earth composite fluorescent material and preparation method thereof
  • Binuclear double-ligand rare earth composite fluorescent material and preparation method thereof
  • Binuclear double-ligand rare earth composite fluorescent material and preparation method thereof

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preparation example Construction

[0087] (2) The preparation method of the composite fluorescent material is simple and easy;

[0088] (3) The composite fluorescent material of the present invention is a dual-core double-ligand rare earth composite material, which broadens the scope of rare earth research.

Embodiment 1

[0097] Weigh 0.2747g (0.75mmol) EuCl with an analytical balance 3 ·6H 2 O and 0.28261 g (0.75 mmol) of DyCl 3 ·6H 2 O was placed in a 50mL beaker, and 20.00mL of absolute ethanol solution was added, and at the same time, a magnetic stirrer was added and placed on an electric heating magnetic stirrer and stirred at 35°C until completely dissolved; accurately measure 1.5mmol of acetylacetone ( ACAC), directly added in the above-mentioned beaker, the solution becomes a clear and transparent light yellow liquid, then allow it to react for 30min (recorded as reaction solution I) under the same conditions; Add amine to a 50mL beaker and then dissolve it with 5mL of absolute ethanol, and add triethylamine dropwise to the above-mentioned reacted solution at a rate of 3 seconds per drop with a cleaned rubber dropper; A large amount of white smoke was emitted, after the dropwise addition, the white smoke was no longer emitted, and after the dropwise addition, it was reacted for 1 hou...

Embodiment 2

[0101] This embodiment is the same as the method used in Example 1, the difference is only that the consumption of acetylacetone and o-phenanthroline is different, the consumption of acetylacetone in this embodiment is 3mmol, and the consumption of o-phenanthroline is 3mmol; the product obtained is denoted as Eu 0.5 Dy 0.5 (ACAC) 2 (phen) 2 .

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Abstract

The invention provides a binuclear double-ligand rare earth composite fluorescent material and a preparation method thereof. Rare earth europium ions and dysprosium ions, which are used as luminous bodies, react with acetylacetone and phenanthroline which are used as organic ligands under preset conditions to obtain the rare earth complex composite fluorescent material, and the obtained compositefluorescent material is characterized. The cost of the composite fluorescent material is reduced, and the prepared composite fluorescent material has a high fluorescence intensity and a good fluorescence performance.

Description

technical field [0001] The invention relates to the field of fluorescent materials, in particular to a dual-core, double-ligand rare earth complex composite fluorescent material and a preparation method thereof. Background technique [0002] The luminescence of rare earth metal-organic complexes has the advantages of high luminous intensity, narrow wave peak, bright color, good weather resistance, low light attenuation, and not easy to be oxidized. Therefore, the luminescence research of rare earth organic complexes has very important theoretical significance and application value. The characteristic oxidation state of rare earth elements is +3 valence, so when the lanthanide atoms lose electrons and become ions, the 4f orbitals begin to fill with electrons one by one, because the inner 4f electrons are received by the outer 5s 2 5p 6 The shielding effect of the full shell, so it is less affected by the external electric field, coordination field and magnetic field, which m...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07F5/00
CPCC09K11/06C07F5/003C09K2211/182C09K2211/1029
Inventor 王永忠陶栋梁金凤姜广鹏张琳陈继堂
Owner FUYANG NORMAL UNIVERSITY
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