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Polyalkyl-fluorene conjugated polymer and use

A technology of conjugated polymers and polyalkylfluorenes, which is applied in the field of polyalkylfluorene conjugated polymer materials, can solve the problems of difficult manufacturing process and increased device cost, and achieve high quantum efficiency

Inactive Publication Date: 2003-08-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electron transport materials are generally small molecule materials and high vacuum evaporation is required to form an electron transport layer, making the process difficult and increasing the cost of the device.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 Preparation of 3,4-bis(4-bromophenyl)-3-cyclobutene-1,2-dione

[0016] 3,4-bis(4-bromophenyl)-3-cyclobutene-1,2-dione was prepared according to the method disclosed in Polymer Bulletin, 1999, 42, 183-190. In a 100 ml three-necked flask, 3.04 g (26.6 mmol) of squaraine, 6.42 g (54.0 mmol) of thionyl chloride and N,N-dimethylformamide (DMF) (catalytic amount) were added. Heat the reaction mixture to about 65°C and react for about 2 hours. Cool the reaction solution, then add 20 ml of bromobenzene and 8.5 g (63.8 mmol) of anhydrous aluminum trichloride to the mixture, and react at room temperature for about 30 hours. The mixture was poured into 20 ml of water, extracted with ethyl acetate, the extract was dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure to obtain a crude product. The pure product was obtained by recrystallization from ethanol (melting point: 172°C, yield: 46%).

Embodiment 2

[0017] Example 2 Preparation of N-n-dodecyl-3,4-bis(4-bromophenyl)pyrrole-2,5-dione

[0018] N-n-dodecyl-3,4-bis(4-bromophenyl)pyrrole-2,5-dione was prepared according to the method disclosed in Polymer Bulletin, 2001, 46, 29-35.

[0019] 3,4-bis(4-bromophenyl)-3-cyclobutene-1,2-dione 3.92 g (10 mmol), m-chloroperoxybenzoic acid 4.68 g (19 mmol, 70%) Dichloromethane (10 ml) was stirred at room temperature under nitrogen protection for about 14 hours, then 1.0 g of sodium bisulfite was added, and stirring was continued for 1 hour. Use a silica gel column (dichloromethane as eluent) to filter off m-chlorobenzoic acid to obtain crude product, and recrystallize in ethanol to obtain green-yellow crystals.

[0020] With 2.27 grams (5.6 millimoles) of above-mentioned crystals, the toluene (20 milliliters) solution of 1.1 grams (5.9 millimoles) of n-dodecylamine was stirred for about 1 hour, added triethylamine and 20 milliliters of toluene of catalytic amount, continued to stir fo...

Embodiment 3

[0021] Example 3 Preparation of N-n-octyl-3,4-bis(4-bromophenyl)pyrrole-2,5-dione

[0022] The synthesis method refers to Example 2.

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Abstract

The invention refers to a polyalkyl fluorene conjugated polymer whose construction consists of 9,9' double substituted fluorene construction unit and diaryl substituted cubic acid or maleic amino one. The conjugated polymer is used as the luminescent material and can be applicable to make electroluminescent devices.

Description

1. Technical field [0001] The present invention relates to a polyalkylfluorene conjugated polymer material, in particular to a polyalkylfluorene conjugated polymer material containing a squarylium group or a maleamide group. [0002] The invention also relates to the application of the polyalkylfluorene conjugated polymer material in the preparation of light-emitting materials, especially the application in the preparation of light-emitting diodes, light-emitting layers and electron transport layers in flat panel displays. 2. Background technology [0003] Since Burroughes et al. reported the first electroluminescent device based on phenylacetylene conjugated polymer in 1990, the conjugated polymer can be used for ultra-thin, flexible, large-area, multi-color display due to its potential, and in the production of electroluminescence The process of light-emitting devices has the advantages of simple operation and easy industrialization, and has become a research hotspot in th...

Claims

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Application Information

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IPC IPC(8): C08F132/08C09K11/00
Inventor 彭强谢明贵卢志云黄艳蒋青
Owner SICHUAN UNIV
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