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Polymer blue phosphorescence host material containing anthracene-azole and dibenzofuran units, preparation method and applications thereof

A technology of benzofuran and phosphorescent host is applied in the field of polymer blue phosphorescent host material and its preparation, which can solve the problems of low luminous efficiency and the like, and achieve the effects of high electroluminescent efficiency, novel material structure and good thermal stability.

Inactive Publication Date: 2015-04-15
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminous efficiency of this phosphorescent material is low

Method used

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  • Polymer blue phosphorescence host material containing anthracene-azole and dibenzofuran units, preparation method and applications thereof
  • Polymer blue phosphorescence host material containing anthracene-azole and dibenzofuran units, preparation method and applications thereof
  • Polymer blue phosphorescence host material containing anthracene-azole and dibenzofuran units, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: The polymer blue phosphorescent host material containing anthrazole and dibenzofuran units in this example, that is, poly{2,7-diyl-4,9-diphenylanthrazole-co-3,7 -Diyl-dibenzo[b,d]furan-2,8-bis(triphenylsilane)}(P1) (wherein, n=38), its structural formula is as follows:

[0028]

[0029] The preparation steps of above-mentioned polymer are as follows:

[0030] The reaction formula is as follows:

[0031]

[0032] Under argon protection, 2,7-dibromo-4,9-diphenylanthrazole (98 mg, 0.2 mmol), 3,7-dipinacol borate dibenzo[b,d]furan -2,8-bis(triphenylsilane) (187mg, 0.2mmol) was added to a flask filled with 10ml of toluene solvent, and after fully dissolving, potassium carbonate (2mL, 2mol / L) solution was added to the flask, and vacuum removed Oxygen was filled with argon, then bistriphenylphosphinepalladium dichloride (5.6mg, 0.008mmol) was added; the flask was heated to 100°C for Suzuki coupling reaction for 48h. Subsequently, the polymerization reaction...

Embodiment 2

[0035] Example 2: The polymer blue phosphorescence host material containing anthrazole and dibenzofuran units in this example, that is, poly{2,7-diyl-4,9-diphenylanthrazole-co-2,7 -Diyl-9-(4-(diphenylphosphinooxy)phenyl)-9H-carbazole} (P2) (wherein, n=23), its structural formula is as follows:

[0036]

[0037] The preparation steps of above-mentioned polymer are as follows:

[0038] The reaction formula is as follows:

[0039]

[0040] Under the protection of mixed gas of nitrogen and argon, 2,7-dibromo-4,9-diphenylanthrazole (147mg, 0.3mmol), 3,7-dipinacol borate dibenzo[b, d] Add furan-2,8-bis(triphenylsilane) (281mg, 0.3mmol) and 15mL tetrahydrofuran into a 50mL two-neck flask, fully dissolve and then pass in a mixture of nitrogen and argon to exhaust the air for about 20min. Then tetrakistriphenylphosphinepalladium (4mg, 0.003mmol) was added thereto, and after fully dissolved, sodium bicarbonate (3mL, 2mol / L) solution was added. Then, the mixed gas of nitrogen an...

Embodiment 3

[0042] Example 3: The polymer blue phosphorescent host material containing anthrazole and dibenzofuran units in this example, that is, poly{2,7-diyl-4,9-diphenylanthrazole-co-2,7 -Diyl-9-(4-(diphenylphosphinooxy)phenyl)-9H-carbazole} (P3) (wherein, n=86), its structural formula is as follows:

[0043]

[0044] The preparation steps of above-mentioned polymer are as follows:

[0045] The reaction formula is as follows:

[0046]

[0047] Under nitrogen protection, 2,7-dibromo-4,9-diphenylanthrazole (147mg, 0.3mmol), 3,7-dipinacol borate dibenzo[b,d]furan-2 , 8-bis(triphenylsilane) (309mg, 0.33mmol), palladium acetate (3.5mg, 0.015mmol) and three (o-methylphenyl)phosphine (21mg, 0.06mmol) were added to 12mL of N, In the flask of N-dimethylformamide, add potassium carbonate (3mL, 2mol / L) solution after fully dissolving, then blow nitrogen into the flask and exhaust the air for about 30min; heat the flask to 130°C for Suzuki coupling reaction for 12h. Subsequently, stop the ...

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Abstract

The invention belongs to the field of organic electroluminescent materials, and discloses a polymer blue phosphorescence host material containing anthracene-azole and dibenzofuran units, a preparation method and applications thereof. The structural formula of the host material is represented in the description, and in the formula the n represents an integer in a range of 15 to 86. In the provided host material, the anthracene-azole unit contains two nitrogen atoms, is an excellent electron transmission unit, and moreover, has good rigidity, planarity, and thermal stability. The tetraphenyl silicon is a host material with an ultrahigh energy gap and has an extremely high triplet state energy level. Tetraphenyl-silicon-substituted dibenzofuran is introduced into the anthracene-azole main chain in order to solve the electro-inertia of tetraphenyl silicon, and thus the efficiency of organic electroluminescent devices is improved.

Description

technical field [0001] The invention relates to the field of organic electroluminescence materials, in particular to a polymer blue phosphorescence host material containing anthrazole and dibenzofuran units, a preparation method and application thereof. Background technique [0002] Since 1987, C.W.Tang et al. of Kodak reported for the first time that Alq 3 Since the double-layer device structure of light-emitting materials, organic electroluminescence has received great attention. Organic electroluminescence can be divided into fluorescence and phosphorescence electroluminescence. According to the spin quantum statistical theory, the formation probability ratio of singlet excitons and triplet excitons is 1:3, that is, singlet excitons only account for 25% of the "electron-hole pairs". Therefore, the fluorescence from the radiative transition of singlet excitons only accounts for 25% of the total input energy, while the electroluminescence of phosphorescent materials can u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12C09K11/06H01L51/54
Inventor 周明杰张振华王平黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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