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

Twist structured p-phenylene ethylene luminous polymer and use thereof

A technology of p-phenylene vinylene and light-emitting polymers, which is applied in the field of conjugated light-emitting polymers, can solve problems such as low carrier mobility, difficulty in blue light, and limited range of blue shift, so as to improve blue light-emitting performance, Effect of improving quantum efficiency and inhibiting association

Inactive Publication Date: 2006-11-22
JILIN UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for obtaining blue-emitting PPV are not very successful. For example, the PPV oligomers are connected by flexible chains. Although blue-emitting materials can be obtained, the device efficiency is very low due to very low carrier mobility; the use of side chains The steric hindrance effect of the substituent group reduces the planarity of the main chain, which can blue-shift the spectrum, but the blue-shift range is limited, and it is difficult to achieve pure blue light

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
  • Twist structured p-phenylene ethylene luminous polymer and use thereof
  • Twist structured p-phenylene ethylene luminous polymer and use thereof
  • Twist structured p-phenylene ethylene luminous polymer and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 6-cyclohexyl-2, the synthesis of 10-dialdehyde-bisphenyl [d, f] [1,3] bisoxazepine (synthetic route sees figure 2 ) Dissolve compound 1 (2,2'-dihydroxybiphenyl) in dichloromethane, stir vigorously at room temperature, add equimolar bromine, stop the reaction when precipitation occurs, and obtain compound 2a, 5, 5 '-Dibromo-2,2'-dihydroxybiphenyl,

[0047] Dissolve compound 2a (5,5'-dibromo-2,2'-dihydroxybiphenyl) in benzene, add p-toluenesulfonic acid and equimolar 2,2'-dimethoxycyclohexane, heat, Remove the components at 57-59°C, stop the reaction, and neutralize with sodium methoxide. Extracted with ether, dried over anhydrous sodium sulfate, removed the solvent, and recrystallized from ethanol to obtain compound 3a (6,6-cyclohexyl-2,10-dibromo-bisphenyl[d,f][1,3]bisoxazene ),

[0048] Compound 3a (6,6-cyclohexyl-2,10-dibromo-bisbenzo[d,f][1,3]bisoxazepine) was added to 20 ml of dry tetrahydrofuran under nitrogen protection. Add n-BuLi (n-butyllithium) ...

Embodiment 2

[0049] Example 2 The synthetic route of twisted monomer 2', 3 "-dialdehyde-5, 7-diphenylthiazepine (see the route image 3 ) Add NBS (N-bromosuccinimide) to 85% sulfuric acid solution of compound 1 and stir vigorously for 1 hour, add water and stir, extract with acetone, and recrystallize with DMSO (dimethyl sulfoxide) to obtain compound 2b;

[0050] In the presence of oxygen, the mixture of compound 2b and ketone chloride was dissolved in pyridine and stirred for 6 hours, extracted with ether, dried and recrystallized to obtain compound 3b,

[0051] NaBH 4 Slowly add to THF (tetrahydrofuran) and cool to -78°C, add SnCl under nitrogen 4 , vigorously stirred for 30min, and the temperature was raised to 0°C, the THF solution of compound 3b was added dropwise to the above solution once, slowly brought to room temperature and vigorously stirred for 48h, then poured into ice water, extracted with ether, dried, and column chromatographed to obtain the compound 4b; After acidifica...

Embodiment 3

[0054] Example 3 Wide Bandgap Blue Light Emitting PPV-like Polymers

[0055] Synthesis of SCHDDBDOP-PPV (poly(2,10-(6-cyclohexyl-bisphenyl [d, f] [1,3] dioxazepine)-1,4 phenylene vinylene)) (route see Figure 4 ),

[0056] The dried drug 2,5-dibromomethylbenzene and triphenylphosphine were distilled in DMF (N,N-dimethylformamide) for 14 hours at a molar ratio of 1:2.02, and the phosphine was filtered out after cooling. The salt precipitated, washed with p-xylene and dried. Under nitrogen protection conditions, in a fully dry reaction device, add phosphine salt, potassium tert-butoxide, and drug 4a, namely 6-cyclohexyl-2,10-dialdehyde-bisphenyl [d] in a molar ratio of 2:3:2.02 , f][1,3]bioxazepine, reacted in THF at 0°C for 6 hours, washed four times with methanol, and dried to obtain a polymer.

[0057] The optical properties of the above-mentioned blue light-emitting PPV polymers:

[0058] The absorption and emission spectra of the blue light-emitting polymer SCHDDDOP-PPV...

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

A p-phenylene vinylene light-emitting polymer with a twisted structure is characterized in that it is formed by introducing bridged seven-membered heterocyclic monomers into the main chain of p-phenylene vinylene (PPV) and its derivatives. The invention can remarkably improve the blue light-emitting performance, and is suitable for preparing polymer light-emitting diodes. Optically pumped and electrically pumped lasers. Semiconductor devices such as field effect transistors.

Description

technical field [0001] The invention relates to a conjugated luminescent polymer, in particular to a twisted p-phenylene vinylene (hereinafter referred to as PPV)-based luminescent polymer and its application Background technique [0002] In 1990, the University of Cambridge reported the electroluminescent properties of conjugated polymer PPV, and many related π-conjugated polymers with luminescent properties were synthesized one after another, such as MEH-PPV (alkoxy-substituted PPV), CN-PPV (cyanide PPV) and so on. With the in-depth study of organic polymer semiconductors, the commercial application prospects of polymer semiconductors for display technology are becoming clearer. The world market for organic and polymer light-emitting materials for displays is enormous. PPV materials are the electroluminescent materials with the best performance at present, but according to the current situation, PPV and its derivatives that emit green light and orange-red light have exce...

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 Patents(China)
IPC IPC(8): C08F112/32H05B33/02
Inventor 马於光张海全何凤沈方中李昱鹏沈家骢
Owner JILIN UNIV
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