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Novel light-emitting beta-diketone rare earth complex crystal form material

A technology of rare earth complexes and luminescent materials, which is applied in the direction of luminescent materials, compounds containing elements of group 3/13 of the periodic table, electrical components, etc., and can solve the problems of insufficient luminous efficiency and thermal stability of rare earth complex luminescent materials, Achieve the effects of improving luminous efficiency and thermal stability, low production cost, and simple process

Inactive Publication Date: 2015-04-15
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the luminous efficiency and thermal stability of rare earth complex luminescent materials are not high enough, which is still a key problem restricting their application in important fields such as organic electroluminescence.

Method used

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  • Novel light-emitting beta-diketone rare earth complex crystal form material
  • Novel light-emitting beta-diketone rare earth complex crystal form material
  • Novel light-emitting beta-diketone rare earth complex crystal form material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] New Crystalline Rare Earth Complex Polycrystalline Powder Eu(BTA) 3 Preparation of (DFA):

[0028] A. Weigh 1mmol of Eu(NO 3 ) 3 ·6H 2 0 and 3mmol of benzoyltrifluoroacetone were added to dissolve in 15ml of acetonitrile, and 6ml of 0.5mol / L sodium hydroxide solution was added dropwise, fully stirred to obtain a clear solution 1;

[0029] B. Weigh 1mmol of 4,5-diazafluorene, add 7ml of acetonitrile to dissolve, and obtain a light-colored clear solution 2;

[0030] C. Slowly add solution 2 to solution 1 dropwise, and stir at room temperature for 1 hour to obtain solution 3;

[0031] D. Add deionized water to solution 3, white powder is precipitated, and continue to stand for one day. After filtering, washing with water and drying, a new crystal form of rare earth complex luminescent material Eu(BTA) was obtained. 3 Crystalline powder product of (DFA), yield 89%.

[0032] For rare earth complexes Eu(BTA) 3 (DFA) phase-pure powders were subjected to a series of per...

Embodiment 2

[0034] New Crystal Form of Rare Earth Complex Eu(BTA) 3 (DFA) single crystal acquisition and characterization:

[0035]Add deionized water, deionized water, acetonitrile buffer solution, and the saturated solution 3 in Example 1 to the test tube in turn, and wait for several days to obtain colorless transparent block crystals. Choose one with a size of 0.26×0.23×0.18 The single crystal of mm is used for X-ray single crystal diffraction, and Eu(BTA) is obtained by analysis 3 (DFA) molecular structure. The molecular structure of the compound is shown in the attached figure 1 .

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Abstract

The invention discloses a novel light-emitting beta-diketone rare earth complex crystal form material. The novel light-emitting beta-diketone rare earth complex crystal form material is prepared from europium nitrate and BTA (benzoyltrifluoroacetone) and DFA (4,5-Diazafluoren) by complexing reaction, and has the molecular formula of Eu (BTA)3(DFA), wherein, BTA is benzoyltrifluoroacetone, and DFA is 4, 5-Diazafluoren. The preparation method of the light-emitting material comprises the following steps: reacting europium nitrate, BTA and DFA in a mixed solution of acetonitrile and water according to the stoichiometric ratio of 1:3:1, adding a proper amount of sodium hydroxide to remove protons of BTA, adding deionized water, further reacting the separated product in a mother liquor for a period of time, filtering, washing, and drying so as to obtain a target product. The complex is good in solubility property, high in light-emitting efficiency and good in thermal stability, and can be applied to the field of red light photoluminescence or electroluminescence.

Description

technical field [0001] The invention relates to the field of rare earth luminescent materials, in particular to the field of rare earth complex luminescent materials. Background technique [0002] Materials are one of the three pillars of the development of modern society, and luminescent materials are very important functional materials. Rare earth ions have some unique properties due to their special outer electron structure, so they are widely used in the fields of optics, electricity, and magnetism, and are known as a treasure house of new materials. In recent years, the research on rare earth complexes has become more and more mature, its application fields have become more and more extensive, and new applications have emerged continuously. The application of rare earths in my country has spread to all fields of the national economy, and the economic benefits are remarkable. Therefore, actively developing high-tech rare earth products and transforming my country's rare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00C09K11/06H01L51/54
Inventor 柴文祥张小丽洪明卫夹国华秦来顺史宏声唐高舒康颖徐凯杰陈孝炯黄绵吉赵毅田园
Owner CHINA JILIANG UNIV