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Dentritic pattern compound, preparation method and application

A compound and dendritic technology, applied in the field of dendritic compounds, can solve problems such as reducing carrier transport performance, and achieve good application prospects, high luminous brightness and efficiency, and high yield

Inactive Publication Date: 2007-07-25
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dendritic polyphenyl group has a large steric hindrance, which can effectively prevent the aggregation of molecules, but at the same time it will reduce the carrier transport performance

Method used

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  • Dentritic pattern compound, preparation method and application
  • Dentritic pattern compound, preparation method and application
  • Dentritic pattern compound, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The synthetic routes of the three compounds involved in the present invention are shown in the following formula

[0057]

[0058] First prepare the precursor 4,4'-bis(2,3,4,5-tetraphenyl)-phenylbenzophenone

[0059] Response i:

[0060] 4,4'-dibromodiphenyl diketone (3.68g, 0.01mol), trimethylsilylacetylene (2.36g, 0.024mol), catalyst Pd (PPh 3 ) 2 Cl 2 (10%) and CuI (5%) toluene / triethylamine (1:1) 40ml, stirred at 60° C. for 12 hours under a nitrogen atmosphere, and after the reaction was completed, the solvent was distilled off under reduced pressure. The obtained solid product was purified by a silica gel column, and the yellow solid obtained after removing the solvent was 4,4'-bis-(trimethylsilylethynyl)-phenylbenzophenone. 4,4'-bis-(trimethylsilylethynyl)-phenylbenzophenone (2.01g, 0.005mol) and K 2 CO 3 (6.9g, 0.05mol) was stirred in 50mL of dichloromethane at room temperature for 6 hours. After the reaction was completed, it was washed with water, and th...

Embodiment 2

[0072] Preparation of OLEDs devices:

[0073] The first step: cleaning of tin indium oxide (ITO) glass

[0074] The ITO glass was washed with detergent, tap water, deionized water, acetone, and absolute ethanol in sequence, and then dried in an oven.

[0075] The second step: vapor deposition of organic semiconductor layer

[0076] Place the cleaned ITO glass slide in a vacuum chamber at 4×10 -4 Under the vacuum of Pa, each organic layer was vapor-deposited at a rate of 2 mm / s. The total thickness of the organic semiconducting layers in the device is ~100 nm.

[0077] Step 3: Cathode Preparation

[0078] An Al cathode is evaporated on the ITO substrate on which the organic layer has been evaporated, with a thickness of 100 nm.

[0079] The fabricated device structure is shown in Figure 3.

[0080] Step 4: Testing of Device Performance

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Abstract

This invention discloses three kinds of dentritic compounds based on cyano-substituted phenylquinoxaline, methyl-substituted phenylquinoxaline, and cyano-substituted phenylpyrazine. The preparation method comprises: reacting 4, 4'-dibromo dipheny ethanedione with trimethylsilico acetylene, reacting with tetraphenyl cyclopentanone to obtain a precursor, and reacting with 1, 2-diamino-4, 5-dicyanobenzene, 1, 2-diamino-4, 5-dimethylbenzene and 2, 3-diaminobutanedinitrile, respectively, to obtain corresponding dentritic compounds. The dentritic compounds can be used as luminescent and electron-transfer material to prepare OLED with high luminescent brightness and efficiency.

Description

technical field [0001] The present invention relates to a dendrimer. [0002] The present invention also relates to the preparation method of the above compound. [0003] The present invention also relates to the use of the above compounds. Background technique [0004] Organic light-emitting diodes (OLEDs) have made great progress since they were reported in 1987 (C.W.Tang, S.A. VanSlyke, Appl. Phys. Lett. 1987, 51, 913). Due to the advantages of low cost, wide viewing angle, high efficiency, and flexible display, OLEDs are generally considered to be the next generation of mainstream display and lighting devices. In the past two decades, researchers have synthesized many novel electroluminescent materials to improve the luminous efficiency, brightness, stability, and color purity of OLEDs. Although most of these materials have a high fluorescence quantum yield in solution, the quantum yield in the thin film state is not high. This is because the material molecules are ea...

Claims

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Application Information

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IPC IPC(8): C07D241/24C07D241/42C09K11/06
Inventor 于贵徐新军陈仕艳刘云圻狄重安邱文丰朱道本
Owner INST OF CHEM CHINESE ACAD OF SCI
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