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Blue-phosphorescence pyrimidine iridium complex and preparation method thereof

A technology of phosphorescent pyrimidine iridium and iridium complexes, applied in indium organic compounds, platinum group organic compounds, chemical instruments and methods, etc., can solve the problems of low luminous efficiency and achieve the effect of easy raw materials and low production costs

Inactive Publication Date: 2015-04-22
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with phosphorescent materials of other colors, the luminous efficiency of blue electrophosphorescent materials is usually lower, and there are relatively few blue phosphorescent iridium complexes with high color purity reported in the literature, so the synthesis of highly efficient saturated blue phosphorescent Iridium complexes are badly needed

Method used

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  • Blue-phosphorescence pyrimidine iridium complex and preparation method thereof
  • Blue-phosphorescence pyrimidine iridium complex and preparation method thereof
  • Blue-phosphorescence pyrimidine iridium complex and preparation method thereof

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Effect test

Embodiment 1

[0027] A blue phosphorescent pyrimidine iridium complex is characterized in that it has the following structural formula:

[0028] its CH 2 Cl 2 The solution can emit blue phosphorescence under the excitation light of 350nm, the maximum emission peak is at 461nm, CIEx, and the y chromaticity coordinates are (0.14, 0.17), and can be used as a luminescent material, a guest material and a doping material for making blue electrophoresis. Luminescent devices.

Embodiment 2

[0030] A preparation method of blue phosphorescent pyrimidine iridium complex, comprising the following steps:

[0031] B. Preparation of ring metal ligand: 4,6-dimethyl-2-chloropyrimidine and 2,4-difluorophenylboronic acid are added to triphenylphosphine, ethylene glycol dimethyl ether and saturated potassium carbonate solution Add palladium acetate and heat to reflux under nitrogen protection for 10-24 hours, cool and separate the layers, separate to obtain the first organic phase, extract the aqueous phase with ethyl acetate, and separate the layers to obtain the second organic phase Combine the first organic phase and the second organic phase and wash with distilled water and saturated brine and separate to obtain the third organic phase, the third organic phase is dried with anhydrous magnesium sulfate and filtered, and the filtrate is concentrated and then added to the silica gel column to Dichloromethane and acetone mixed solvent are eluent elution, obtain eluent, disti...

Embodiment 3

[0038] In a 100ml three-necked flask, add 3.9961g (25mmol) 2-chloro-4,6-dimethylpyrimidine, 4.7453g (30mmol) 2,4-difluorophenylboronic acid, 25ml ethylene glycol dimethyl ether, 0.6557 g (2.5mmol) triphenylphosphine, 34ml saturated potassium carbonate solution. Under nitrogen protection, 0.14g (0.625mmol) palladium acetate was added, heated to reflux for 18h, cooled to room temperature, the organic phase was separated, and the aqueous phase was extracted with ethyl acetate (60ml×4). After the organic phases were combined, they were washed with 80 ml of distilled water and 80 ml of saturated brine, dried over anhydrous magnesium sulfate, filtered, and the filtrate was concentrated, and carried out silica gel column chromatography with dichloromethane and acetone mixed solvent (10:1) as eluent , to obtain 4,6-dimethyl-2-(2,4-difluorophenyl)pyrimidine as light yellow solid, named as MDFPPM, with a yield of 78%. 1 HNMR (CDCl 3 , 400MHz) δ: 8.01(t, 1H), 6.95(t, 3H), 2.51(m, 6H). ...

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Abstract

The invention provides a blue-phosphorescence pyrimidine iridium complex and a preparation method thereof, and relates to the technical field of electro-phosphorescence material. The preparation method comprises the steps of cyclometalated ligand preparation, chloro-bridged iridium complex preparation, and iridium complex preparation. With the method, the blue-phosphorescence pyrimidine iridium complex with a structural formula below is obtained. A CH2Cl2 solution of the iridium complex provided by the invention can emit blue phosphorescence CIEx with y chromaticity coordinates of (0.14, 0.17) under 350nm excitation light, and can be used for preparing blue electroluminescent devices as a luminescent material, a guest material or a dopant material. The preparation process of the preparation method is simple, and raw materials are easy to obtain.

Description

technical field [0001] The invention belongs to the technical field of electrophosphorescent materials, and relates to a blue phosphorescent pyrimidine iridium complex and a preparation method thereof. Background technique [0002] In recent years, electrophosphorescent materials have become a research hotspot because of their good luminescent properties and theoretically 100% internal quantum efficiency. [0003] The electrophosphorescent materials currently studied are mainly organic heavy metal complexes such as osmium, iridium, platinum, and ruthenium. Metal iridium complexes have relatively short triplet lifetimes and higher luminous efficiency, and can emit strong phosphorescence at room temperature. And the emission wavelength can be adjusted through the adjustment of the ligand structure so that the color of the electroluminescent device covers the entire visible light region. It is the most studied phosphorescent material. [0004] In order to achieve full-color di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC09K11/06C07F15/0033C09K2211/185H10K85/341
Inventor 盛烨锋葛国平李春艳韦传东
Owner NINGBO UNIV