Semi-aromatic polyimide, color-adjustable room-temperature phosphorescent material based on semi-aromatic polyimide and preparation method of color-adjustable room-temperature phosphorescent material

A polyimide-based, semi-aromatic technology, which is applied in the field of color-tunable room temperature phosphorescent materials based on semi-aromatic polyimide groups and the preparation thereof, can solve the problem of low light transmittance and chromaticity of polyimide. Yellow, polyimide research blanks and other issues, to achieve the effect of improving high thermal stability, low cut-off wavelength, and excellent optical transparency

Active Publication Date: 2022-06-28
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be widely used in aerospace, engineering plastics, separation membranes, flexible displays, 5G applications, photoresists, and photovoltaics, but the research on polyimide in the field of phosphorescent materials is relatively blank
The polyimide prepared by using the aromatic ring diacid anhydride monomer with higher rigidity has lower light transmittance and yellower chroma

Method used

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  • Semi-aromatic polyimide, color-adjustable room-temperature phosphorescent material based on semi-aromatic polyimide and preparation method of color-adjustable room-temperature phosphorescent material
  • Semi-aromatic polyimide, color-adjustable room-temperature phosphorescent material based on semi-aromatic polyimide and preparation method of color-adjustable room-temperature phosphorescent material
  • Semi-aromatic polyimide, color-adjustable room-temperature phosphorescent material based on semi-aromatic polyimide and preparation method of color-adjustable room-temperature phosphorescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A color-tunable room temperature phosphorescent material based on semi-aromatic polyimide

[0063] (1) The preparation method of semi-aromatic polyimide powder:

[0064] S1: 4.325 g of bis[4-(3-aminophenoxy)phenyl]sulfone and 32.51 g of N,N-dimethylacetamide were added to a nitrogen-protected flask equipped with mechanical stirring at room temperature, and stirred until a clear solution was obtained. Slowly add 3.063g of dicyclohexyl-3,4,3',4'-tetracarboxylic dianhydride in batches with vigorous stirring, and add them in three batches. The last addition amount is less than or equal to half of the previous one. Room temperature The next reaction was 8h.

[0065] S2: 5 ml of acetic anhydride and 2.5 ml of pyridine are added to the solution described in S1, while the temperature is raised to 140° C., and the reaction is carried out for 12 hours under the condition of solvent reflux.

[0066] S3: The polyimide solution obtained in S2 is subjected to precipitation and suct...

Embodiment 2

[0073] A color-tunable room temperature phosphorescent material based on semi-aromatic polyimide

[0074] (1) The preparation method of semi-aromatic polyimide powder:

[0075] S1: 4.325 g of bis[4-(3-aminophenoxy)phenyl]sulfone and 35.95 g of N,N-dimethylacetamide were added to a nitrogen-protected flask equipped with mechanical stirring at room temperature, and stirred until a clear solution was obtained. 3.844 g of norbornane-2-spiro-α-cyclopentanone-α'-spiro-2"-norbornane-5,5",6,6"-tetracarboxyl were slowly added in portions with vigorous stirring Acid dianhydride (CpODA) was added in three times, and the last addition amount was less than or equal to half of the previous one, and the reaction was carried out at room temperature for 8 hours.

[0076] S2: 5 ml of acetic anhydride and 2.5 ml of pyridine are added to the solution described in S1, while the temperature is raised to 150° C., and the reaction is carried out for 12 hours under the condition of reflux of the solv...

Embodiment 3

[0084] A color-tunable room temperature phosphorescent material based on semi-aromatic polyimide

[0085] (1) The preparation method of semi-aromatic polyimide powder:

[0086] S1: 4.325g of 4,4'-((sulfonylbis(4,1-phenylene))bis(oxy))diphenylamine and 32.51g of N,N were added to a nitrogen-protected flask at room temperature - Dimethylacetamide, stir until a clear solution. Slowly add 3.063g of dicyclohexyl-3,4,3',4'-tetracarboxylic dianhydride in batches with vigorous stirring, and add them in three batches. The last addition amount is less than or equal to half of the previous one. Room temperature The next reaction was 8h.

[0087] S2: 5 ml of acetic anhydride and 2.5 ml of pyridine are added to the solution described in S1, while the temperature is raised to 140° C., and the reaction is carried out for 12 hours under the condition of solvent reflux.

[0088] S3: The polyimide solution obtained in S2 is subjected to precipitation and suction filtration in a mixed solutio...

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Abstract

The invention discloses semi-aromatic polyimide, a semi-aromatic polyimide-based color-adjustable room-temperature phosphorescent material and a preparation method of the semi-aromatic polyimide-based color-adjustable room-temperature phosphorescent material. The chemical structural formula of the semi-aromatic polyimide is shown in the specification. The obtained semi-aromatic polyimide has high thermal stability and high mechanical property, and the light transmittance reaches 80% or above. The semi-aromatic polyimide-based room-temperature phosphorescent material is prepared by doping polyimide with other small organic molecules, and regulation and control of phosphorescent life and phosphorescent color can be realized. The organic metal complex-free pure organic photoluminescence polymer phosphorescent material avoids potential biotoxicity, and has a wide effect in the fields of anti-counterfeiting, information encryption, biological imaging and the like.

Description

technical field [0001] The invention belongs to the technical field of room temperature phosphorescent materials, in particular to a color-tunable room temperature phosphorescent material based on a semi-aromatic polyimide group and a preparation method thereof. Background technique [0002] Room-temperature phosphorescence is a process in which the ground state is excited to the excited singlet state, the excited triplet state is passed through the intersystem, and finally the ground state is reached by radiative transition. Phosphorescence has attracted extensive attention in the fields of bioimaging, sensing applications, optoelectronic applications, information encryption, and anti-counterfeiting applications due to its large Stokes shift, long lifetime, and full utilization of excited state energy. However, due to weak spin-orbit coupling and large non-radiative rate constants, triplet excitons of organic light-emitting bodies are easily deactivated by non-radiative dec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C09D179/08C09D7/63C09K11/06
CPCC08G73/1007C08G73/105C08G73/1064C08G73/1078C09D179/08C09D7/63C09K11/06C09K2211/1029C09K2211/1011C08K5/18C08K5/3417
Inventor 涂范霖霍延平籍少敏穆英啸陈文铖赵建章赵经纬
Owner GUANGDONG UNIV OF TECH
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