Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Organic electro-phosphorescent material and preparation method thereof, and organic electroluminescent device

A phosphorescent material, electromechanical technology, applied in luminescent materials, electro-solid devices, organic chemistry, etc., to achieve the effect of facilitating evaporation, reducing direct effects, and reducing the probability of non-radiative transitions

Inactive Publication Date: 2015-02-11
OCEANS KING LIGHTING SCI&TECH CO LTD +2
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of spin statistics theory, the theoretical internal quantum efficiency limit of fluorescent materials is only 25%. How to make full use of the remaining 75% of phosphorescence to achieve higher luminous efficiency has become a hot research direction in this field since then.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Organic electro-phosphorescent material and preparation method thereof, and organic electroluminescent device
  • Organic electro-phosphorescent material and preparation method thereof, and organic electroluminescent device
  • Organic electro-phosphorescent material and preparation method thereof, and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] The present invention also relates to a method for preparing the above-mentioned organic electrophosphorescent material, which method comprises the following steps in sequence:

[0038] 1. Synthesize compound C through Suzuki coupling reaction between compound E and compound F; wherein, compound F is 2,3,4-trifluorophenylboronic acid, and the structural formulas of compound E and compound C are as follows:

[0039] Compound E is Compound C is

[0040] 2. Reaction of compound C prepared in step 1 with compound D to generate a chlorine-bridged dimer, namely compound A. Wherein, compound D is trihydrate iridium trichloride IrCl 3 ·3H 2 O. The structural formula of compound A is as follows:

[0041]

[0042] 3. Use the compound A prepared in step 2 as the main structure of the ring metal ligand, and use 2,4-bis(trifluoromethyl)-5-(pyridin-2'-yl)pyrrole (compound B) as the auxiliary Ligand source, reacting compound A and compound B to obtain an iridium metal comp...

Embodiment 1

[0050] The organic electrophosphorescent material disclosed in this example is bis(2-(4',5',6'-trifluorophenyl)pyrimidine-N,C 2 ')(2,4-bis(trifluoromethyl)-5-(pyridine-2'-yl)pyrrole) iridium, whose structural formula is as follows:

[0051]

[0052] It is prepared by the following steps:

[0053] (1) Synthesis of 2-(2',3',4'-trifluorophenyl)pyrimidine

[0054] The synthetic reaction formula is as follows:

[0055]

[0056] The specific steps are: under nitrogen atmosphere, combine 1.59g (10mmol) 2-bromopyrimidine, 2.11g (12mmol) 2,3,4-trifluorophenylboronic acid and 0.58g (0.5mmol) tetrakis(triphenylphosphine) Palladium was dissolved in 40ml of toluene, then 20ml of aqueous solution containing 2.76g (20mmol) of potassium carbonate was added dropwise to the reaction system, heated, stirred and reacted at 100°C for 6h, after the reaction solution was cooled to room temperature, dichloromethane Extraction, liquid separation, washing with water until neutral, drying with ...

Embodiment 2

[0072] The organic electrophosphorescent material disclosed in this example is the complex bis(2-(4',5',6'-trifluorophenyl)-5-methylpyrimidine-N,C 2 ')(2,4-bis(trifluoromethyl)-5-(pyridine-2'-yl)pyrrole) iridium, whose structural formula is as follows:

[0073]

[0074] It is prepared by the following steps:

[0075] (1) Synthesis of 2-(2',3',4'-trifluorophenyl)-5-methylpyrimidine

[0076] The synthetic reaction formula is as follows:

[0077]

[0078] The specific steps are: under nitrogen atmosphere, mix 1.73g (10mmol) 2-bromo-5-methylpyrimidine, 1.76g (10mmol) 2,3,4-trifluorophenylboronic acid and 0.28g (0.4mmol) dichlorobis (Triphenylphosphine)palladium was dissolved in 50ml of DMF, and then 25ml of an aqueous solution containing 3.18g (30mmol) of sodium carbonate was added dropwise to the reaction system. Heat to 90°C and stir to react for 8 hours. After the reaction solution is cooled to room temperature, extract with dichloromethane, separate liquids, wash with...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to an organic electro-phosphorescent material and a preparation method thereof, and an organic electroluminescent device. The organic electro-phosphorescent material (P) has a following structure, wherein R is H or Cx-C20 straight-chain or branched-chain alkyl. According to the organic electro-phosphorescent material, a blue-light organic electro-phosphorescent material iridium metal complex is synthesized with 2-(2',3',4'-trifluorophenyl)pyrimidine as a cyclo-metal ligand and with 2,4-bis(trifluoromethyl)-5-(pyridin-2'-yl)pyrrole as a subsidiary ligand. The adjustment upon material luminescent colors is realized through introducing alkyl chain chemical modification to the pyrimidine ring of the cyclo-metal ligand, such that high-luminous-efficiency blue phosphorescent emission is obtained.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to an organic electrophosphorescent material. The invention also relates to the preparation method of the organic electroluminescent material and its application in organic electroluminescent devices. Background technique [0002] Organic electroluminescence refers to a luminescence phenomenon in which organic materials directly convert electrical energy into light energy under the action of an electric field. In the early days, the research on organic electroluminescence was stagnant because of the high driving voltage and low luminous efficiency of organic electroluminescent devices. Until 1987, Tang et al. from Kodak Corporation of the United States invented 8-hydroxyquinoline aluminum (Alq3) as a light-emitting material, and made a uniform and dense high-quality film with aromatic diamines, which produced low operating voltage, high brightness, High-efficiency organic elec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07F15/00H01L51/54
Inventor 周明杰王平张娟娟陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com