A kind of organic blue light-emitting material and preparation method thereof

A blue light-emitting material and organic technology, applied in the direction of light-emitting materials, organic chemistry, chemical instruments and methods, etc., can solve the problems that limit the development of organic light-emitting diode devices, achieve improved hole transport ability, simple structure, and high luminous efficiency Effect

Active Publication Date: 2020-08-07
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Judging from the current research situation of luminescent materials, in order to achieve full-color display, blue light materials, red light materials and green light materials are all necessary. At present, the research on green light materials and red light materials has been relatively mature, and the corresponding light emitting devices The efficiency of organic light-emitting diodes is also high, but there are few blue light materials with high efficiency, pure chromaticity, and simple structure, which limits the development of organic light-emitting diode devices to a certain extent.

Method used

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  • A kind of organic blue light-emitting material and preparation method thereof
  • A kind of organic blue light-emitting material and preparation method thereof
  • A kind of organic blue light-emitting material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment one: the synthesis of compound 1:

[0036]

[0037] Under nitrogen atmosphere, 476mg (2.0mmol) 2,5-dibromopyrazine, 183mg (0.2mmol) tris(dibenzylideneacetone) dipalladium, 110mg (0.2mmol) 1,1'-bis-diphenyl 768mg (8.0mmol) of phosphinoferrocene and sodium tert-butoxide were added to a pressure-resistant reaction flask. After the gas was pumped twice, 475mg (4.4mmol) of 2-(methylamino)pyridine was also added to the reaction flask under the protection of nitrogen. In the bottle, add toluene (15mL) again and start heating and reflux reaction, the temperature is controlled at 120 ° C, stop the reaction after 20h of reaction, cool to room temperature, remove the insoluble matter in the mixed solution after the reaction by suction filtration, remove the solvent in the obtained filtrate, and The obtained crude product was passed through a silica gel column to obtain 576 mg of compound 1 as a yellow solid, yield: 98%.

Embodiment 2

[0038] Embodiment two: the synthesis of compound 1:

[0039] Under nitrogen atmosphere, 119 mg (0.5 mmol) 2,5-dibromopyrazine, 46 mg (0.05 mmol) tris(dibenzylideneacetone) dipalladium, 28 mg (0.05 mmol) 1,1'-bis-diphenyl Add 192mg (2mmol) of phosphinoferrocene and sodium tert-butoxide into a pressure-resistant reaction flask, and after pumping out the gas twice, add 119mg (1.1mmol) of 2-(methylamino)pyridine to the reaction flask under nitrogen protection Add toluene (10mL) again and start heating to reflux reaction, the temperature is controlled at 100 ° C, stop the reaction after 24 hours of reaction, cool to room temperature, remove the insoluble matter in the mixed solution after the reaction by suction filtration, remove the solvent in the obtained filtrate, and The obtained crude product was passed through a silica gel column to obtain 135 mg of compound 1 as a yellow solid, yield: 93%.

Embodiment 3

[0040] Embodiment three: the synthesis of compound 1:

[0041] Under nitrogen atmosphere, 476mg (2.0mmol) 2,5-dibromopyrazine, 183mg (0.2mmol) tris(dibenzylideneacetone) dipalladium, 110mg (0.2mmol) 1,1'-bis-diphenyl 768mg (8.0mmol) of phosphinoferrocene and sodium tert-butoxide were added to a pressure-resistant reaction flask. After the gas was pumped twice, 475mg (4.4mmol) of 2-(methylamino)pyridine was also added to the reaction flask under the protection of nitrogen. In the bottle, add toluene (20mL) again and start the heating and reflux reaction, the temperature is controlled at 150 ° C, stop the reaction after 48 hours of reaction, cool to room temperature, remove the insoluble matter in the mixed solution after the reaction by suction filtration, remove the solvent in the obtained filtrate, and The obtained crude product was passed through a silica gel column to obtain 560 mg of compound 1 as a yellow solid, yield: 96%.

[0042] 2. Structural analysis

[0043] The H...

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Abstract

The invention discloses an organic blue luminescent material whose general structural formula is shown as I, wherein, Ar 1 and Ar 2 are the same or different aryl groups, R 1 and R 2 same or different, R 1 and R 2 are independently selected from alkyl or aryl. The invention also discloses a preparation method of the organic blue luminescent material. The organic blue luminescent material can be synthesized through a simple one-step C-N coupling reaction, the yield can be as high as 98%, and the luminescent quantum efficiency is 0.43. The prepared organic blue light-emitting material has the characteristics of simple structure, easy preparation, high luminous efficiency and the like. The organic blue luminescent material obtained by the invention has potential applications in fields such as organic electroluminescent devices.

Description

technical field [0001] The invention relates to the field of organic photoelectric materials, in particular to an organic blue light-emitting material and a preparation method thereof. Background technique [0002] Organic light-emitting diode devices have good research and application value due to their many advantages such as self-luminescence, all-solid-state, wide viewing angle, fast response, low driving voltage, low energy consumption, high efficiency, and bendability. [0003] As an important part of organic light-emitting diode devices, luminescent materials still have some defects, such as low luminous efficiency, poor stability or short lifetime of excited states, etc. At present, the luminescent materials used in light-emitting devices are still expensive iridium, platinum, etc. Rare precious metal complex luminescent material. In order to reduce the cost of light-emitting devices, the development of organic small molecule materials with easy preparation and good...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D401/14C07D241/20C09K11/06H01L51/54
CPCC09K11/06C07D241/20C07D401/14C09K2211/1029C09K2211/1011C09K2211/1007C09K2211/1044H10K85/626H10K85/654H10K85/6572
Inventor 吴四海刘接卿马俊杰
Owner HUAQIAO UNIVERSITY
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