A dinuclear rare earth europium complex luminescent material and its preparation method and application

A technology of europium complexes and luminescent materials, which is applied in the field of rare earth luminescent materials, can solve the problems of insufficient luminous efficiency and thermal stability of luminescent materials, and achieve the effects of improving luminous efficiency and thermal stability, readily available raw materials, and simple processes

Active Publication Date: 2019-10-29
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The luminous efficiency and thermal stability of rare earth europium 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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  • A dinuclear rare earth europium complex luminescent material and its preparation method and application
  • A dinuclear rare earth europium complex luminescent material and its preparation method and application
  • A dinuclear rare earth europium complex luminescent material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0033] The crystal form rare earth complex Eu 2 L 1 6 L 2 2 (CH 3 Oh) 2 Preparation of single crystals.

[0034] (1) Weigh 0.2mmol of benzoylthiourea p-aminobenzoate and 0.15mmol of potassium hydroxide, add methanol, dichloromethane and n-butanol to dissolve, stir well, and stir at room temperature for 2 hours to obtain a clear solution 1;

[0035] (2) Weigh 0.1 mmol of europium chloride hexahydrate, add it to the above solution 1, and stir at room temperature for 2 hours to obtain a clear solution 2;

[0036] (3) Weigh 0.2 mmol of 1,10-phenanthroline, add it to the above solution 2, stir at room temperature for 2 hours to obtain solution 3, filter it, let it stand, and wait for it to volatilize for three days to obtain a fine crystalline rare earth complex The luminescent material is filtered, washed with ethanol, and dried to obtain the crystalline rare earth complex. Yield: 83.3%.

[0037] It was volatilized for three days to obtain a colorless transparent block c...

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Abstract

A dinuclear rare earth europium complex luminescent material and its preparation method and application, the general structural formula of which is Eu 2 L 1 6 L 2 2 (CH 3 Oh) 2 , where L 1 P-aminobenzoic acid benzoylthiourea derivatives, L 2 It is one of 1,10-phenanthroline, 2,2-bipyridine or 2-thienoyltrifluoroacetone. The binuclear rare earth europium complex of the present invention is a luminescent material with good thermal stability and high luminous efficiency. Its molecular structure is regular, and its fluorescence intensity and quantum yield are very obvious after adding the second auxiliary ligand. Increase. The preparation method has the advantages of simple process, simple equipment, simple and easy-to-obtain raw materials, and low production cost.

Description

technical field [0001] The invention relates to the field of rare earth luminescent materials, in particular to a dinuclear rare earth europium complex luminescent material with 1,10-phenanthroline as a neutral ligand and its preparation and application. Background technique [0002] Lanthanide complexes have the characteristics of clear linear emission spectrum, high quantum yield and long fluorescence lifetime, and their performance is superior to organic fluorescent materials and semiconductor nanoparticle luminescent materials. They have always been a hot spot in the field of luminescent materials research. It has broad application prospects. [0003] Ln in the lanthanide coordination system III The luminescence of the ions is mainly through the indirect sensitization process from the light-harvesting antenna chromophore instead of directly exciting Ln III center to achieve. Typically, the f–f transitions of rare earth complexes have small absorption coefficients, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00C09K11/06H01L51/50H01L51/54
CPCC09K11/06C07F5/003C09K2211/182H10K85/351H10K50/11H10K2101/10
Inventor 李东平王倩胡灿乾胡航娜陈宁宇谢一步李永绣
Owner NANCHANG UNIV
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