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Dinuclear europium complex luminescent material and preparation and application of dinuclear europium complex luminescent material

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, easy availability of raw materials, and simple equipment

Active Publication Date: 2018-02-23
NANCHANG UNIV
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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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  • Dinuclear europium complex luminescent material and preparation and application of dinuclear europium complex luminescent material

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Embodiment 1

[0033] The crystalline rare earth complex Eu 2 L 1 6 L 2 2 (CH 3 OH) 2 Single crystal preparation.

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

[0036] (3) Weigh 0.2mmol of 1,10-phenanthroline, add it to the above solution 2, stir at room temperature for 2 hours to obtain solution 3, filter, stand still, 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. The yield: 83.3%.

[0037] It volatilizes for three days to obtain colorless and transparent massive crystals. A single cry...

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Abstract

The invention relates to a dinuclear europium complex luminescent material and a preparation and application of the dinuclear europium complex luminescent material. The structural general formula of the dinuclear europium complex luminescent material is Eu2L16L22(CH3OH)2, wherein L1 is a p-aminobenzoic acid benzoyl thioureas derivatives; and L2 is one of 1,10-phenanthroline, 2,2-dipyridyl or 2-thenoyltrifluoroacetone. The dinuclear europium complex is a luminescent material with good thermal stability and high luminous efficiency; the molecular structure of the dinuclear europium complex is regular, and after a second auxiliary ligand is added in the dinuclear europium complex luminescent material, the fluorescence intensity and the quantum yield of the dinuclear europium complex luminescent material are improved quite obviously. The preparation method has the advantages of simplicity and convenience in process, simple used equipment, simple and easily obtained 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 clear linear emission spectra, high quantum yield and long fluorescence lifetime, and their performance is better than organic fluorescent materials and semiconductor nano-particle luminescent materials. They have always been a hot spot in the field of luminescent materials. It has a wide range of application prospects. [0003] Ln in lanthanide coordination system III The luminescence of the ion is mainly through the indirect sensitization process from the chromophore of the light-trapping antenna instead of directly exciting Ln III Center to achieve. Normally, the f-f transition of rare earth coordination has a small absorption coefficient, and the radiation lifetime of th...

Claims

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Application Information

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Patent Type & Authority Applications(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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