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Blue phosphorescence iridium complexes, preparing method thereof and organic electroluminescent device

An iridium metal complex, blue phosphorescence technology, applied in luminescent materials, electro-solid devices, organic chemistry, etc., can solve the problems of poor luminescence performance and development lag of light-emitting devices, reduce interaction force, increase solubility, reduce The effect of self-quenching

Inactive Publication Date: 2014-12-03
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with red light and green light materials, the development of blue light materials is relatively lagging behind. Improving the efficiency and color purity of blue light materials has become the breakthrough point of people's research. There are bottleneck problems in terms of efficiency and device efficiency attenuation, which makes the luminous performance of organic electroluminescent devices poor

Method used

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  • Blue phosphorescence iridium complexes, preparing method thereof and organic electroluminescent device
  • Blue phosphorescence iridium complexes, preparing method thereof and organic electroluminescent device
  • Blue phosphorescence iridium complexes, preparing method thereof and organic electroluminescent device

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preparation example Construction

[0040] see figure 1 , the preparation method of the blue phosphorescence iridium metal complex of an embodiment, comprises the steps:

[0041] Step S110: In a protective gas atmosphere, dissolve compound F and 2,4-bis(trifluoromethyl)phenylboronic acid in a molar ratio of 1:1 to 1.5 in the first solvent, and add an organopalladium catalyst and carbonic acid The aqueous solution of salt is subjected to Suzuki coupling reaction for 10 to 15 hours, and compound A is obtained after separation and purification, and the structural formula of compound F is , the structural formula of compound A is , wherein R is an alkoxy group having 1 to 20 carbon atoms.

[0042] The protective gas is argon, helium or neon.

[0043] The first solvent is toluene or N,N-dimethylformamide (DMF). The amount of the first solvent is suitable for fully dissolving compound F and 2,4-bis(trifluoromethyl)phenylboronic acid. Preferably, the concentration of compound F in the first solvent is 0.07-0.11 ...

Embodiment 1

[0072] Blue Phosphorescent Bis(2-(4',6'-bis(trifluoromethyl)phenyl)-5-methoxypyrimidine-N,C 2 Synthesis of ')(5-(2'-pyridyl)-1,2,3,4-tetrazole)iridium complexes

[0073] Blue Phosphorescent Bis(2-(4',6'-bis(trifluoromethyl)phenyl)-5-methoxypyrimidine-N,C 2 ')(5-(2'-pyridyl)-1,2,3,4-tetrazole) iridium complex has the following structural formula:

[0074]

[0075] (1) Synthesis of 2-(2',4'-bis(trifluoromethyl)phenyl)-5-methoxypyrimidine

[0076]

[0077] Under nitrogen protection, 0.94g (5mmol) 2-bromo-5-methoxypyrimidine, 1.55g (6mmol) 2,4-bis(trifluoromethyl)phenylboronic acid and 0.29g (0.25mmol) tetrakis(triphenyl) Phosphorus) palladium was dissolved in 30mL of DMF, and then 15mL of an aqueous solution containing 1.27g (12mmol) of sodium carbonate was added dropwise to the reaction system. Heated and stirred under reflux for 10h. After the reaction solution was cooled to room temperature, it was extracted with dichloromethane, separated, washed with water until ne...

Embodiment 2

[0099] Blue Phosphorescent Bis(2-(4',6'-bis(trifluoromethyl)phenyl)-4-hexyloxypyrimidine-N,C 2 Synthesis of ')(5-(2'-pyridyl)-1,2,3,4-tetrazole)iridium complexes

[0100] Blue Phosphorescent Bis(2-(4',6'-bis(trifluoromethyl)phenyl)-4-hexyloxypyrimidine-N,C 2 ')(5-(2'-pyridyl)-1,2,3,4-tetrazole) iridium complex has the following structural formula:

[0101]

[0102] (1) Synthesis of 2-(2',4'-bis(trifluoromethyl)phenyl)-4-hexyloxypyrimidine

[0103]

[0104] Under nitrogen protection, 1.30g (5mmol) 2-bromo-4-hexyloxypyrimidine, 1.93g (7.5mmol) 2,4-bis(trifluoromethyl)phenylboronic acid and 0.21g (0.3mmol) dichlorobis( Triphenylphosphine)palladium was dissolved in 30mL of toluene, and then 15mL of an aqueous solution containing 1.38g (10mmol) of potassium carbonate was added dropwise to the reaction system. Heated and stirred under reflux for 12h. After the reaction solution was cooled to room temperature, it was extracted with dichloromethane, separated, washed with wa...

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Abstract

The invention relates to blue phosphorescence iridium complexes, a preparing method thereof and an organic electroluminescent device. The blue phosphorescence iridium complexes are characterized in that: the structure formula of the complexes is shown in the specification, wherein R is alkoxy of C1-C20. The blue phosphorescence iridium complexes can improve electroluminescent properties of the organic electroluminescent device.

Description

technical field [0001] The invention relates to the technical field of electroluminescent materials, in particular to a blue phosphorescent material iridium metal complex, a preparation method thereof and an organic electroluminescent device. Background technique [0002] Organic electroluminescence refers to a luminescence phenomenon in which organic materials directly convert electrical energy into light energy under the action of an electric field. In the early days, the research on organic electroluminescence was stagnant because of the high driving voltage and low luminous efficiency of organic electroluminescent devices. Until 1987, people such as Tang of American Kodak Company invented 8-hydroxyquinoline aluminum (Alq 3 ) is a light-emitting material, and a uniform and dense high-quality thin film is made with aromatic diamines, and an organic electroluminescent device with low operating voltage, high brightness, and high efficiency is prepared, which opens a new pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
Inventor 周明杰王平张娟娟张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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