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Process for preparing green light emitting materials polyalkyl fluorene

An emission material, a technology of polyalkylfluorene, which is applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of reducing the luminous efficiency of materials, and achieve the effects of simplifying the preparation technology, reducing environmental pollution, and eliminating complex reaction steps

Inactive Publication Date: 2006-10-11
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fluorenone units in the ground state can be re-excited to the singlet state, and then emit green light back to the ground state, so a small amount of fluorenone units is enough to make the polymer a green light-emitting material; and too much fluorenone will reduce the luminescence of the material efficiency

Method used

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  • Process for preparing green light emitting materials polyalkyl fluorene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 0.67 g of 9,9-dihexylfluorene and 0.33 g of anhydrous ferric chloride into a mortar, mix them uniformly, and grind at 20°C. After grinding for 20 minutes, add 0.33 g of anhydrous ferric chloride to continue grinding. After 20 minutes, 0.33 g of anhydrous ferric chloride was added again for grinding. The reaction was stopped after a total of 1 hour of trituration. Wash the product in the mortar with industrial methanol, and separate the solid and liquid by centrifugation to remove ferric chloride and unreacted monomers. After repeated washing, the product is dried in a constant temperature oven (50°C). After drying, dissolve the product completely with a small amount of chloroform, add methanol with a volume four to five times the amount of chloroform to precipitate the polymer, and centrifuge again to separate the solid from the liquid. Then the solid product was extracted with methanol for 24 hours in a Soxhlet extractor so that the amount of residual ferric c...

Embodiment 2

[0029] Weigh 0.56 g of dibutylfluorene and 0.33 g of anhydrous ferric chloride into a mortar, mix them evenly, and grind at 20°C. After grinding for 20 minutes, add 0.33 g of anhydrous ferric trichloride and mix with the original reactant, and continue grinding. After 20 minutes, add 0.33 g of anhydrous ferric trichloride again and grind. The reaction was stopped after a total of 1 hour of trituration. Wash the product in the mortar with industrial ethanol, and separate the solid and liquid by centrifugation to remove ferric chloride and unreacted monomers. After repeated washing, the product is dried in a constant temperature oven (50°C). After drying, dissolve the product completely with a small amount of chloroform, add ethanol with a volume four to five times the amount of chloroform to precipitate the polymer, and centrifuge again to separate the solid from the liquid. The solid product is then extracted with methanol for 24 hours in a Soxhlet extractor to reduce the r...

Embodiment 3

[0031]Weigh 0.44 g of diethylfluorene and 0.33 g of anhydrous ferric chloride into a mortar, mix them evenly, and grind at 20°C. After grinding for 20 minutes, add 0.33 g of anhydrous ferric chloride again and mix with the original reactant, continue grinding for 20 minutes, add 0.33 g of anhydrous ferric chloride again, and grind. The reaction was stopped after a total of 1 hour of trituration. Wash the product in the mortar with industrial ethanol, and separate the solid and liquid by centrifugation to remove ferric chloride and unreacted monomers. After repeated washing, the product is dried in a constant temperature oven (50°C). After drying, the product is completely dissolved with a small amount of tetrahydrofuran, and the polymer is precipitated by adding ethanol whose volume is four to five times the amount of tetrahydrofuran, and centrifuged again to separate the solid from the liquid. The solid product is then extracted with methanol for 24 hours in a Soxhlet extra...

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Abstract

The invention relates to a method for preparation of green light-emitting material of polyalkyl fluorenes, which consists of grinding dialkyl fluorenes monomer and oxidant of anhydrous ferric chloride which is 1-4 times of the monomer (mol) with solid phase at 0 DEG C-35 DEG C for 30-60 min, purifying and drying to obtain the green light-emitting material of polyalkyl fluorenes. The invention selects active hydrogen on fluorenyl ring as reaction function group to carry out polymerization reaction, does not need to introduce bifunction group onto monomer and leaves out complex reaction steps for preparing monomer, which simplifies the preparative steps for materials; directly obtains green light-emitting material by one-step reaction, which saves the copolymerization reaction; avoids adopting noble metal such as palladium complex or agent such as boric acid ester, which reduces the cost. The invention is of short response time and high production efficiency; the prepared polymer is of good locational regularity; and the invention reduces the environmental contamination no toxic and organic solvents such as nitrobenzene and chloroform and is an environment-friendly green chemical technique.

Description

technical field [0001] The invention relates to a method for preparing a green light-emitting material whose main chain is polymerized by dialkylfluorene, and belongs to the field of organic macromolecule photoelectric functional materials, or the field of organic conductors and organic semiconductors. In particular, it relates to organic semiconductor materials as active light-emitting layers in organic electroluminescent devices and organic thin-film transistors. Background technique [0002] Since Burroughes et al first reported electroluminescent devices based on phenylacetylene conjugated polymers in 1990, conjugated polymers can be used for ultra-thin, flexible, large-area, multi-color displays due to their potential, and they are also used in the production of electroluminescent devices. The process of the luminescent device has the advantages of simple operation and easy industrialization, and has become a research hotspot in the field of flat panel display. Among t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
Inventor 詹才茂陈知远白卫斌
Owner WUHAN UNIV
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