Blue light-emitting electroluminescent polyfluorene material and its prepn process

A polymer material and luminescent technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the practical gap, restrict the problems of polymer luminescent display screens, etc., and achieve the effect of enhancing luminescence

Active Publication Date: 2005-07-13
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, red light and green light polymer materials have met the requirements of practical application, while the indicators of blue light polymer materials, including efficiency and lifespan, are still far from practical application. One of the main bottlenecks in the industrialization of display screens

Method used

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  • Blue light-emitting electroluminescent polyfluorene material and its prepn process
  • Blue light-emitting electroluminescent polyfluorene material and its prepn process
  • Blue light-emitting electroluminescent polyfluorene material and its prepn process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: 2,7-dibromo-9-decyl-9-(2-(4-amino-1,8-naphthalimide-9-)ethyl-1-)fluorene

[0057] Under the protection of a nitrogen atmosphere, 2.12g (10.0mmol) of 4-amino-1,8-naphthalimide was dissolved in 60ml of dimethyl sulfoxide, and then 0.84g (15.0mmol) of powdered Potassium hydroxide, react at 50°C for ten minutes under electromagnetic stirring, then gradually add 3.426g (6.0mmol) 2,7-dibromo-9-decyl-9-(2-bromoethyl-1-) to the system fluorene. Reacted for 14 hours, washed repeatedly after chloroform extraction, dried, filtered, and column chromatography separated the product to obtain the pure intermediate product 2,7-dibromo-9-decyl-9-(2-(4-amino-1,8-naphthalene Imide-9-)ethyl-1-)fluorene 2.99g, yield 71%.

Embodiment 2

[0058] Example 2: 2,7-dibromo-9-decyl-9-(2-(4-dimethylamino-1,8-naphthalimide-9-)ethyl-1-)fluorene

[0059] Under the protection of nitrogen atmosphere, 0.351g (0.5mmol) 2,7-dibromo-9-decyl-9-(2-(4-amino-1,8-naphthalimide-9-)ethyl- 1-) Dissolve fluorene in 10 ml of dimethyl sulfoxide, then add 0.040 g (1 mmol) of 60% sodium hydride to the solution, react at 0°C for 10 minutes under electromagnetic stirring, and then add 0.71 g (5.0 mmol) to the system Iodomethane, reacted for 3 hours, washed repeatedly after chloroform extraction, dried, filtered, and the product was separated by column chromatography to obtain pure intermediate product 2,7-dibromo-9-decyl-9-(2-(4-dimethylamino -1,8-Naphthoimide-9-)ethyl-1-)fluorene 0.356 g, yield 92%.

Embodiment 3

[0060] Example 3: 2,7-dibromo-9,9-(10-(4-amino-1,8-naphthalimide-9-)decyl-1-)fluorene

[0061] Under the protection of a nitrogen atmosphere, 2.12g (10.0mmol) of 4-amino-1,8-naphthalimide was dissolved in 60ml of dimethyl sulfoxide, and then 0.56g (10.0mmol) of powdered Potassium hydroxide, reacted at 150°C for ten minutes under electromagnetic stirring, then gradually added 0.381g (5.0mmol) 2,7-dibromo-9,9-(10-bromodecyl-1-)fluorene to the system, and reacted After 14 hours, chloroform was extracted and washed repeatedly, dried, filtered, and the product was separated by column chromatography to obtain the pure intermediate product 2,7-dibromo-9,9-(10-(4-amino-1,8-naphthalimide- 9-)decyl-1-)fluorene 2.867g, yield 56%.

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Abstract

The present invention relates to blue electroluminescent polymer material and its preparation process. Based on the thought that deep blue polymer molecule can transfer energy effectively to blue light or blue-green light fluorescent dye molecule, the present invention adopts polyfluorene as deep blue mother body and naphthyl imide with high blue light or blue-green light fluorescence quantum efficiency as doped object unit, and grafts the doped unit onto the mother body to disperse the doped unit inside the mother body in molecule level. By means of regulating the content of the blue light or blue-green light fluorescent dye, the present invention realizes the energy transfer from the blue polymer molecule to the blue light or blue-green light fluorescent dye partially or completely and the pure blue electroluminescence, and constitutes one kind of molecularly dispersed blue polymer electroluminescence material.

Description

technical field [0001] The invention relates to a blue electroluminescence polymer polyfluorene material and a preparation method thereof. technical background [0002] Since the Cavendish Laboratory of the University of Cambridge reported the electroluminescent diode of conjugated polymer for the first time in 1990, polymer electroluminescent materials and devices have outstanding characteristics such as simple process, low cost, and easy realization of large-screen display and flexible display. It has received extensive attention and competing investment from academia and industry. In order to realize the full-color display of polymer luminescence, it is necessary to develop electroluminescent polymer materials that can emit the three primary colors of red, green and blue. At present, red light and green light polymer materials have reached the requirements of practical application, while the indicators of blue light polymer materials, including efficiency and lifespan, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F32/08C08G61/00C09K11/06
Inventor 王利祥刘俊程延祥耿延候
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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