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

Blue ray organic electroluminescent material and preparation method and application thereof

An electroluminescence and electromechanical technology, applied in the fields of luminescent materials, organic chemistry, chemical instruments and methods, etc., can solve problems such as poor blue color purity, achieve good blue light luminescence properties, good film-forming properties, and simple and easy preparation methods. Effect

Inactive Publication Date: 2014-12-03
OCEANS KING LIGHTING SCI&TECH CO LTD +2
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Bis[2-(4′,6′-difluorophenyl)pyridine-N,C2′](2-pyridinecarbonyl)iridium (FIrpic, whose structural formula is shown below) disclosed by Holmes R J, Forrest S R, etc. (App.Phys.Lett.,2003,82(15):2422-2424) is currently the most reported blue light organic electrophosphorescent material with the best comprehensive performance, but the blue light emitted by FIrpic is sky blue, and the color purity of blue light Poor, the CIE of OLED devices made with FIrpic varies between (0.13~0.17,0.29~0.39), which is far from the CIE of standard blue light (0.137,0.084)

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
  • Blue ray organic electroluminescent material and preparation method and application thereof
  • Blue ray organic electroluminescent material and preparation method and application thereof
  • Blue ray organic electroluminescent material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] This example provides a bis(2-(2′,6′-difluoropyridin-3′-yl)pyrimidine-N,C 4′ )(5-(2′-pyridyl)-1,2,3,4-tetrazole) iridium complex, the chemical structure of which is shown in P1:

[0072]

[0073] The preparation steps of the above P1 are as follows:

[0074] S10. Synthesis of compound C1 (2-(2',6'-difluoropyridin-3'-yl)pyrimidine)

[0075] Compound A1 (2-bromopyrimidine) and Compound B (2,6-difluoropyridine-3-boronic acid) represented by the following structural formulas are provided:

[0076]

[0077] Under nitrogen protection, compound A1 (1.59g, 10mmol), compound B (1.91g, 12mmol) and Pd(PPh 3 ) 4 (0.58mg, 0.5mmol) was dissolved in 40mL of toluene, and then 20mL of an aqueous solution containing potassium carbonate (2.76g, 20mmol) was added, and the reaction was stirred at 100°C for 8 hours; extraction, liquid separation, and then washed to neutrality, then dried with anhydrous magnesium sulfate and filtered, and the filtrate was evaporated under reduced pr...

Embodiment 2

[0103] This example provides a bis(2-(2′,6′-difluoropyridin-3′-yl)-5-methylpyrimidine-N,C4′)(5-(2′-pyridyl)- 1,2,3,4-tetrazole) iridium complex, its chemical structure is as shown in P2:

[0104]

[0105] The preparation steps of above-mentioned P2 are as follows:

[0106] S10. Synthesis of compound C2 (2-(2′,6′-difluoropyridin-3′-yl)-5-methylpyrimidine)

[0107] Compound A2 (2-bromo-5-methylpyrimidine) and Compound B (2,6-difluoropyridine-3-boronic acid) represented by the following structural formulas are provided:

[0108]

[0109] Under nitrogen protection, compound A2 (1.73g, 10mmol), compound B (1.59g, 10mmol) and Pd(PPh 3 ) 2 Cl 2 (0.28mg, 0.4mmol) was dissolved in 50mL of DMF, then 25mL of an aqueous solution containing sodium carbonate (3.18g, 30mmol) was added, and stirred at 90°C for 10 hours; after the reaction solution was cooled to room temperature, it was extracted with dichloromethane , liquid separation, then washed with water until neutral, then dr...

Embodiment 3

[0132] This example provides a bis(2-(2′,6′-difluoropyridin-3′-yl)-5-tert-butylpyrimidine-N,C 4′ )(5-(2′-pyridyl)-1,2,3,4-tetrazole) iridium complex, the chemical structure of which is shown in P3:

[0133]

[0134] The preparation steps of above-mentioned P3 are as follows:

[0135] S10. Synthesis of compound C3 (2-(2′,6′-difluoropyridin-3′-yl)-5-tert-butylpyrimidine)

[0136] Compound A3 (2-bromo-5-tert-butylpyrimidine) and Compound B (2,6-difluoropyridine-3-boronic acid) represented by the following structural formulas are provided:

[0137]

[0138] Under nitrogen protection, compound A3 (2.15g, 10mmol), compound B (2.22g, 14mmol) and Pd(PPh 3 ) 2 Cl 2 (0.21mg, 0.3mmol) was dissolved in 35mL of DMF, then 15mL of an aqueous solution containing sodium carbonate (1.06g, 10mmol) was added, and stirred at 85°C for 12 hours; after the reaction solution was cooled to room temperature, it was extracted with dichloromethane , liquid separation, then washed with water unt...

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

No PUM Login to View More

Abstract

The invention belongs to the field of photoelectric materials, and in particular relates to a blue ray organic electroluminescent material with the structural formula shown as P, wherein R is hydrogen atom or C1-C20 alkyl. The blue ray organic electroluminescent material has higher LUMO (lowest unoccupied molecular orbital) energy level and lower HOMO (highest occupied molecular orbital) energy level, is conducive to blue shift of material luminescent wavelength, and also has higher phosphorescence quantum efficiency and better dissolution properties and processing properties. The invention also provides a preparation method of the blue ray organic electroluminescent material and application of the blue ray organic electroluminescent material in organic electroluminescent devices.

Description

technical field [0001] The invention relates to the field of optoelectronic materials, in particular to a blue-light organic electroluminescent material and its preparation method and application. 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. 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. The complexes of iridium, ruthenium, platinum, etc. can obtain high emission energy from their own triplet state, and the metal iridium (III) compound, due to its good stability, has mild reaction conditions during the synthesis process and has a high electron emission. The lumin...

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 周明杰王平张娟娟钟铁涛
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