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Pure organic room-temperature phosphorescence material p-bromo aryl aldehyde substituted PPV derivative and preparation method thereof

A technology of room temperature phosphorescence and derivatives, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve problems such as difficulty in realizing room temperature phosphorescence and affecting the use of materials, and achieve the effects of reducing preparation costs, easy film formation, and good photoelectric performance

Inactive Publication Date: 2019-12-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For general pure organic materials, the lifetime of triplet excitons is longer, and without the action of heavy metal atoms, the radiation-free dissipation of triplet excitons at room temperature is difficult to achieve due to the influence of oxygen quenching, molecular rotation vibration, etc. Efficient room-temperature phosphorescence, phosphorescent emission can only be observed in low-temperature inert environments, affecting the practical use of the material

Method used

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  • Pure organic room-temperature phosphorescence material p-bromo aryl aldehyde substituted PPV derivative and preparation method thereof
  • Pure organic room-temperature phosphorescence material p-bromo aryl aldehyde substituted PPV derivative and preparation method thereof
  • Pure organic room-temperature phosphorescence material p-bromo aryl aldehyde substituted PPV derivative and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1) Preparation of 2,5-dibromo-1,4-benzenediol

[0022] Add 5g of hydroquinone and 50mL of glacial acetic acid in a 150mL three-necked bottle, stir and dissolve at room temperature, then add the acetic acid solution of liquid bromine (10g) drop by drop, continue to stir and react overnight at room temperature, and finally the system is cloudy. After the solid was obtained by suction filtration, the solid product was washed with a large amount of water and dried to obtain 2,5-dibromo-1,4-benzenediol.

[0023] 2) Preparation of 2,5-dibromo-1,4-dialkoxyoctylbenzene

[0024] Add 3.1g of 2,5-dibromo-1,4-benzenediol and 3.4g of potassium carbonate in a 150mL three-necked flask, dissolve them in 60mL of DMF, then add 4g of bromooctane, fill with nitrogen for protection, and heat up to 70°C, stirred and reacted for 24 hours. After the reaction was completed, the reaction mixture was naturally cooled to room temperature, and the mixture was poured into a large amount of deionize...

Embodiment 2

[0032] 1) Preparation of 2,5-dibromo-1,4-benzenediol

[0033] Add 5g of hydroquinone and 60mL of glacial acetic acid in a 150mL three-necked bottle, stir and dissolve at room temperature, then add the acetic acid solution of liquid bromine (8g) drop by drop, continue to stir and react overnight at room temperature, and finally the system is cloudy. After the solid was obtained by suction filtration, the solid product was washed with a large amount of water and dried to obtain 2,5-dibromo-1,4-benzenediol.

[0034] 2) Preparation of 2,5-dibromo-1,4-dialkoxyoctylbenzene

[0035] Add 3.1g of 2,5-dibromo-1,4-benzenediol and 3.6g of potassium carbonate to a 150mL three-necked flask, dissolve them in 60mL of DMF, then add 4.65g of bromooctane, fill with nitrogen for protection, and raise the temperature to 80°C, stirred and reacted for 20 h. After the reaction was completed, the reaction mixture was naturally cooled to room temperature, and the mixture was poured into a large amount...

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Abstract

The invention relates to a pure organic room-temperature phosphorescence polymer material p-bromo aryl aldehyde substituted PPV derivative and a preparation method thereof. The structural formula of the room-temperature phosphorescence material is a poly (p-phenylene vinylene) derivative structure shown in the figure as shown in the specification. The obtained polymer has good solubility, is soluble in various common solvents such as trichloromethane, dichloromethane and tetrahydrofuran, and thus can be conveniently spin-coated by a solution method to form a film; the obtained polymer does notcontain rare heavy metals, so that the preparation cost is low; the polymer has good photoelectric property and is suitable for being used as a light-emitting layer material of an organic light-emitting diode (OLED); and in addition, by the obtained polymer material, effective phosphorescence emission can be realized at the room temperature, and the design of the structure of the material provides certain guiding ideas for further developing the pure organic room-temperature phosphorescence polymer material.

Description

technical field [0001] The invention relates to a pure organic room temperature phosphorescent material p-bromoarylaldehyde substituted PPV derivative and a preparation method thereof. Background technique [0002] Organic light-emitting diodes (OLEDs) are devices based on electroluminescence. Due to their unique structure, ultra-thin, light weight, high brightness, low energy consumption, and good flexibility, they have rapidly developed into A new generation of lighting display technology. At present, although OLED devices have been put into actual production and successfully applied to daily life, they still face problems such as low device efficiency, which affects their further expansion of the application market. [0003] As an effective means to improve the external quantum efficiency of devices, improving the internal quantum efficiency of electroluminescent materials has attracted much attention. According to the statistics of quantum spin theory, the ratio of sin...

Claims

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Application Information

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IPC IPC(8): C08G61/02C09K11/06
CPCC08G61/02C08G2261/1332C08G2261/1424C08G2261/1428C08G2261/146C08G2261/18C08G2261/3422C08G2261/412C08G2261/5242C08G2261/64C08G2261/95C09K11/06C09K2211/1425
Inventor 贺英程念何梁家鸿许鑫付佳伟王均安
Owner SHANGHAI UNIV
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