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Eu complex red luminous crystal material containing two ligands and preparation method of Eu complex red luminous crystal material

A technology of red luminescence and crystal materials, which is applied in luminescent materials, compounds containing elements of group 3/13 of the periodic table, chemical instruments and methods, etc., can solve the problems such as the decrease of fluorescence intensity of compounds, and achieve excellent luminescence performance and thermal stability The effect of high stability and easy availability of raw materials

Inactive Publication Date: 2015-11-04
LUOYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for general ligands due to the existence of O–H, C–H chemical bonds in the compound, etc., the energy release ligands caused by non-radiative transitions such as vibrational relaxation, electron transfer, and intersystem jumping will make the compound decrease in fluorescence intensity

Method used

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  • Eu complex red luminous crystal material containing two ligands and preparation method of Eu complex red luminous crystal material
  • Eu complex red luminous crystal material containing two ligands and preparation method of Eu complex red luminous crystal material
  • Eu complex red luminous crystal material containing two ligands and preparation method of Eu complex red luminous crystal material

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Experimental program
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Effect test

Embodiment 1

[0027] a. Dissolve 0.3mmol of organic ligand TFBA in a mixture of 30ml of water and organic solvent (water: DMF=0.2:1) to obtain solution A

[0028] b. Take 0.05mmol of Eu 2 O 3 And 0.1mmol of HMIMDA were added to 20ml of solution A, and after stirring, solution B was obtained;

[0029] c. Stir the solution B prepared in step b with a magnetic stirrer at room temperature and pressure for 20 minutes, and then add dilute HNO 3 , Adjust the pH to 3.0 to obtain the precursor liquid C, for use.

[0030] d. Transfer the precursor liquid C obtained in step c to a hydrothermal reactor lined with polytetrafluoroethylene, add DMF (DMF: water = 1:3), seal the reactor, and put the reactor into the oven , Select the temperature control mode for the reaction, the temperature is controlled at 165℃, after 72 hours of reaction, the reactor is controlled to cool to room temperature at a cooling rate of 5℃ / h, and the colorless crystals appearing at the bottom of the reactor are collected, and then the ...

Embodiment 2

[0040] A preparation method of Eu complex red luminescent crystal material containing two ligands includes the following steps:

[0041] a. Dissolve 0.1 mmol of organic ligand TFBA in a mixture of 40 ml of water and organic solvent (water:ethanol=1:1) to obtain solution A

[0042] b. Take 0.02mmol Eu(NO 3 ) 3 And 0.04mmol of HMIMDA were added to 10ml of solution A, and after stirring evenly, solution B was obtained;

[0043] c. Stir the solution B prepared in step b with a magnetic stirrer at room temperature and pressure for 30 minutes, and then add dilute HNO 3 , Adjust the pH value to 4 to obtain the precursor liquid C, for use.

[0044] d. Transfer the precursor liquid C prepared in step c to a hydrothermal reaction kettle lined with polytetrafluoroethylene, and then add 4 ml of DMF into the sealed reaction kettle, and put the reaction kettle in the oven, select the temperature control mode The reaction is carried out, the temperature is controlled at 140 ℃, after 90 hours of rea...

Embodiment 3

[0046] A preparation method of Eu complex red luminescent crystal material containing two ligands includes the following steps:

[0047] a. Take 0.2mmol of organic ligand 3,4,5,6 tetrafluorophthalic acid and dissolve it in 30ml of water and organic solvent (water:methanol=2:1) ​​to obtain solution A;

[0048] b. Take 0.04mmol of Eu(NO 3 ) 3 .6H 2 O and 0.1mmol of HMIMDA were added to 30ml of solution A, and after stirring, solution B was obtained;

[0049] c. Stir the solution B prepared in step b with a magnetic stirrer at room temperature and pressure for 25 minutes, and then add dilute HNO 3 , Adjust the pH to 3 to obtain the precursor liquid C, for use.

[0050] d. Transfer the precursor liquid C prepared in step c to a hydrothermal reaction kettle lined with polytetrafluoroethylene, seal the reaction kettle, and put the reaction kettle in an oven, select the temperature control mode for reaction, and control the temperature at 180 ℃, after 60 hours of reaction, control the react...

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Abstract

The invention relates to a Eu complex red luminous crystal material containing two ligands and a preparation method of the Eu complex red luminous crystal material. The chemical formula of the luminous material is {[Eu(TFBA)].(HMIMDA)].H2O]}n, wherein n is greater than 1. The material can be motivated by visible lights and emits bright red fluorescence. The Eu complex red luminous crystal material containing two ligands prepared by the invention can emit strong red visible lights to satisfy the display demands of electronic industry, public places, home appliances and the like as well as the display demands of three-primary-color fluorescent lamps and large-screen and high-definition color televisions, and has wide application in the luminous material field such as beacon lights in stations and wharves. The luminous material provided by the invention is simple in synthetic method, the raw materials are cheap and are easily available, and the crystallinity of the product is relatively good. The luminous material is free of toxicity and pollution, high in thermal stability, good in water solubility and excellent in luminous performance.

Description

technical field [0001] The invention relates to the technical field of rare earth luminescent materials, in particular to an Eu complex red luminescent crystal material containing two ligands and a preparation method thereof. Background technique [0002] In the past two decades, rare earth luminescent materials have been widely used in LED lighting, plasma flat panel display, photoluminescence display, clinical monitoring, signal transmission and other fields, and play an important role in military, medical and agricultural fields, Eu 3+ It has characteristic red emission, high luminous intensity and high quantum efficiency, so around Eu 3+ Synthesis of different types of luminescent materials has always been a topic of interest. So far, rare earth trichromatic luminescent materials and their preparation methods have been mainly using europium oxide doped with trivalent Eu ions as red powder, polyaluminate co-doped with trivalent Tb ions and trivalent cerium ions as green ...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07F5/00
Inventor 冯勋白若飞李仕辉李荣芳秦国展王杨
Owner LUOYANG NORMAL UNIV
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