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8- hydroxy quinoline bryhtening blue light and preparation method

A hydroxyquinoline aluminum, hydroxyquinoline technology, applied in the field of research and preparation of organic electroluminescent materials, can solve the problems of difficult to popularize and use in the industrial field, difficult to extract high purity, difficult to synthesize and extract, etc. The effect of easy industrial preparation, low synthesis cost and great difficulty

Inactive Publication Date: 2005-03-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 8-Hydroxyquinoline aluminum is the most commonly used green-emitting material in organic electroluminescent devices. It has good film-forming properties. It can form tens of Nano-thick film with good stability, high luminous efficiency, high luminous brightness, high glass transition temperature, easy preparation, simple synthesis process, low cost, high yield, good color and purity, is a research comparison It is a mature organic electroluminescent material that can be prepared and produced industrially, but it is only limited to green light, and 8-hydroxyquinoline aluminum that emits blue light is still a scientific research blank
[0004] Among the existing blue-blue organic electroluminescent materials, there are mainly: organometallic chelates, rare earth complexes, triphenylamine derivatives and polymers, such as: 8-hydroxyquinoline lithium, N, N '-Diphenyl-N, N'-bis(3-methylphenyl) 1,1'-biphenyl 4,4'-diamine (abbreviation: TPD), N, N'-diphenyl-N , N'-bis(1-naphthyl) 1,1'-biphenyl 4,4'-diamine (abbreviation: NPB), the synthesis and extraction of these blue-emitting materials are very difficult, the yield is very low, and the purity is high. The extraction is more difficult, the cost is high, and it is difficult to be widely used in the industrial field

Method used

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  • 8- hydroxy quinoline bryhtening blue light and preparation method
  • 8- hydroxy quinoline bryhtening blue light and preparation method
  • 8- hydroxy quinoline bryhtening blue light and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Compound reaction and extraction of green-emitting 8-hydroxyquinoline aluminum:

[0086] ①Combination reaction: low purity extraction

[0087] Place the round-bottom four-necked flask on the electric heating mantle, add the 8-hydroxyquinoline methanol solution into the four-necked flask through the filling port, then place the separatory funnel on the four-necked flask, and separate the aluminum acetate methanol solution from The funnel is slowly dripped into the four-necked flask at a rate of 2-3 drops per second, and then stirred with an electric stirrer, while stirring while dripping; at the same time, insert a gas pipe into the other port of the four-necked flask and input nitrogen for nitrogen protection , Prevent the oxygen in the air from entering, use a gas flow meter to control the nitrogen flow rate, the nitrogen gas flow rate is 20-40 ml / min; insert a methanol gas reflux tube into the other mouth of the four-necked flask, after the electric heating mantle is turn...

Embodiment 2

[0096] ①Extraction of low-purity 8-hydroxyquinoline aluminum that emits blue light:

[0097] The extraction of the blue-emitting aluminum quinolinol is performed after the purification of the green-emitting aluminum 8-quinolinol.

[0098] Vacuum heating method:

[0099] Place the round-bottomed single-necked flask on the heating mantle, put the high-purity green-emitting aluminum 8-hydroxyquinoline powder in the single-necked flask, and use the glass tube with a sealing rubber stopper on the single-necked flask to pass through the rubber tube and the vacuum pump Connect, then tighten the sealing rubber stopper, turn on the vacuum pump, keep the single-neck flask in a vacuum state, keep the vacuum degree ≤0.1 MPa, and start heating at the same time, so that the temperature in the single-neck flask rises to 370°-390°C, and keep the temperature for 30 minutes. , Then turn off the heating mantle, stop heating, strictly control the maximum temperature not to exceed, to prevent scorchin...

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Abstract

A 8-hydroxyquinolyl aluminium able to emit blue light is prepared from 8-hydroxyquinoline crystal, anhydrous aluminium acetate, absolute methanol, acetone, pyridine and NN-dimethylformamide through reaction, washing, filtering, baking, vacuum heating, constant temp, cooling, N2 protection recrystallizingand test analysing.

Description

Technical field [0001] The invention relates to a blue-emitting 8-hydroxyquinoline aluminum and a preparation method thereof, and belongs to the technical field of research and preparation methods of organic electroluminescent materials. Background technique [0002] Organic electroluminescent material is a new type of luminescent material in the electronics industry. It is often used in organic electroluminescent devices. It has simple preparation process, low power consumption, rich display colors, autonomous light emission, flat panel display, small size, thin thickness, and low Voltage direct current drive, full curing, wide viewing angle, large area display, etc., and high luminous efficiency, good brightness and long service life. [0003] 8-Hydroxyquinoline aluminum is one of the most commonly used materials that emit green light in organic electroluminescent devices. It has good film-forming properties. Using vacuum thermal evaporation film technology, it can form dozens ...

Claims

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Application Information

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IPC IPC(8): C07D215/24C07F5/06
Inventor 许并社王华郝玉英周禾丰李洁阮莉敏
Owner TAIYUAN UNIV OF TECH
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