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Bipolar green light-based organic electroluminescent material and preparation method thereof

A luminescent, bipolar technology, applied in the field of bipolar green organic electroluminescent materials and their preparation, can solve the problem of low carrier transport efficiency, and achieve the ability to promote injection and transport, electron injection and transport The effect of enhancing and improving the effect of the device

Pending Publication Date: 2020-09-15
万志豪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a bipolar green light organic electroluminescent material and a preparation method thereof, which solves the technical problem of low carrier transport efficiency of the existing green light organic electroluminescent material

Method used

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  • Bipolar green light-based organic electroluminescent material and preparation method thereof
  • Bipolar green light-based organic electroluminescent material and preparation method thereof
  • Bipolar green light-based organic electroluminescent material and preparation method thereof

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Effect test

Embodiment 1

[0025] Add 2-aminobenzaldehyde (4.8g, 40mmol) and 50mL of acetone into a 250mL round-bottomed flask, stir in an ice bath for 30min, then add 6% sodium hydroxide solution (120mL) dropwise to the system, and remove Ice bath, stirring at room temperature for 12 hours; then transfer the system to a 1000mL beaker, add an appropriate amount of ice water, 8% dilute hydrochloric acid solution to adjust the pH of the system to 5.5, a large number of yellow solids precipitated, suction filtered, and recrystallized with ethanol / water = 2:1 , to obtain compound (5.15, yield 80%) shown in formula (III), its chemical reaction equation is:

[0026]

Embodiment 2

[0028] To a 500 mL flask was added 4,7-dibromo-2,1,3-benzothiadiazole (2.95 g, 10 mmol), potassium carbonate (4 g, 30 mmol) and 80 mL of acetonitrile. After stirring and dissolving under argon, add the compound (4.8g.30mmol) shown in formula (III), stir and reflux at 85°C, TLC detects the reaction process; after the reaction is over, filter potassium carbonate, and remove the solvent under reduced pressure to obtain The crude product was purified by silica gel chromatography using petroleum / ethyl acetate=10 / 1 as eluent. Then the product is recrystallized in ethanol to obtain compound (6.54g, yield 72%) shown in formula (IV), and its chemical reaction equation is:

[0029]

Embodiment 3

[0031] Add compound (4.54g, 10mmol) shown in formula (IV) in the single port reaction bottle of 250ml, then add chloroform solvent until raw material dissolves completely (100ml), NBS powder (7.12g, 40mmol) is dissolved in 30ml three Chloromethane solution was added dropwise into the reaction flask, and reacted in the dark for 24 hours. Extract three times with DCM, wash once with water, collect organic phase, spin dry DCM, then purify with THF recrystallization, obtain compound (11.3g, productive rate 92%) shown in formula (II), its chemical reaction equation is:

[0032]

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Abstract

The invention belongs to the technical field of photoelectric display devices, and particularly relates to a bipolar green light organic electroluminescent material and a preparation method thereof. According to the bipolar green light organic electroluminescent material, the structural formula of the bipolar green light organic electroluminescent material is shown as a formula (I). The inventionalso provides the preparation method of the bipolar green light organic electroluminescent material. The preparation method comprises the steps: 3, 10-dibromo-14-(3-(5-phenyl-1, 3, 4-oxadiazole-2-yl)phenyl)-14H-bis (S, S-dioxo-dibenzothiophene) pyrrole, 2-(3-(3, 10-bis (4, 4, 5, 5-tetramethyl-1, 3, 2-dioxaboridine-2-yl)-14H-bis (S, S-dioxo-dibenzothiophene) pyrrolo-5-phenyl-1, 3, 4-oxadiazole andthe compound shown in the formula (II) are subjected to Suzuki coupling reaction to obtain the polymer shown in formula (I).The invention provides the bipolar green light organic electroluminescent material and the preparation method thereof, and solves the technical problem of low carrier transport efficiency of the existing green light organic electroluminescent material.

Description

technical field [0001] The invention belongs to the technical field of photoelectric display devices, and in particular relates to a bipolar green light organic electroluminescence material and a preparation method thereof. Background technique [0002] The phenomenon of organic electroluminescence was accidentally discovered by G. Destriau's research group in the course of experiments in 1936. The original report was that the M. Pope research group applied DC high voltage (below 400V) to observe the blue light emission phenomenon on both sides of 10-20m single crystal anthracene. The large-scale development of international organic electroluminescent materials and equipment began in 1987, and Kodak of the United States designed an organometallic complex (Alq 3 ) is an interlayer thin-film electroluminescent device with a light-emitting layer, which has set off an upsurge of scientists studying organic light-emitting diodes. Compared with the current mainstream LCD (liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C09K11/06
CPCC08G73/0273C08G73/0253C08G73/0233C09K11/06C09K2211/1483C09K2211/1475
Inventor 万志豪
Owner 万志豪
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