A kind of fluorescent material, preparation method and application

A fluorescent material and reaction technology, which is applied in the field of preparation and fluorescent materials, can solve the problem of low luminous efficiency of luminescent materials, and achieve the effects of reducing the luminescence quenching process, improving luminous efficiency, and reducing costs

Active Publication Date: 2021-09-21
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above deficiencies in the prior art, the object of the present invention is to provide a fluorescent material, a preparation method and an application, aiming at solving the problem of low luminous efficiency of the existing luminescent materials

Method used

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  • A kind of fluorescent material, preparation method and application
  • A kind of fluorescent material, preparation method and application
  • A kind of fluorescent material, preparation method and application

Examples

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preparation example Construction

[0046] The present invention also provides a preparation method for the above-mentioned fluorescent material, including:

[0047] Step A, preparation of intermediate E containing naphthyridine unit:

[0048] Specifically, intermediate E can adopt the following synthetic route.

[0049]

[0050] In the formula, X and Y are not H at the same time, and the synthesis steps are: disperse compound A and compound B in an organic solvent, for example, using toluene as a solvent, reflux for more than 10 minutes under a protective atmosphere (argon can be used), and separate the compound C; then compound C is placed in diphenyl ether, refluxed for 4-8 hours, separated and purified to obtain compound D; then compound D is placed in phosphorus oxychloride, and the catalyst N,N-dimethylaniline is added to protect Reflux under atmosphere for 1-4 hours, separate and purify to obtain the intermediate E.

[0051]Step B, under anaerobic conditions, dissolve the intermediate E, compound P...

Embodiment 1

[0063] Compound of Example 1 Preparation of (2ND-SAC).

[0064] (1) Synthesis of Intermediate 6-A

[0065]

[0066] In a 250 mL two-neck round bottom flask, 3-aminopyridine (1.88 g, 20 mmol), dibutyl maleate (2.88 g, 20 mmol) and 100 mL of toluene were added. The mixture was refluxed and stirred for 15 minutes under an argon atmosphere, cooled to room temperature, and 250 mL of petroleum ether was added, resulting in a large amount of precipitation, filtered by suction, and dried to obtain 3.46 g of a light yellow solid with a yield of 90%.

[0067] (2) Synthesis of Intermediate 6-B

[0068] In a 250mL round-bottomed flask, add Intermediate 6-A (3.46g, 18mmol) and 130mL of diphenyl ether, the mixture is refluxed at 250°C for 4 hours under argon atmosphere, filtered with suction, and the solid is washed with dichloromethane to obtain a brown Crude product 1.31g, yield 50%.

[0069] (3) Synthesis of intermediate ND-Cl

[0070] In a 50mL two-neck round bottom flask, add ...

Embodiment 2

[0081] Compound of Example 2 Preparation of (2PND-SAC).

[0082] (1) Synthesis of Intermediate 7-A

[0083]

[0084] In a 250 mL two-neck round bottom flask, add 3-amino-4-chloropyridine (2.56 g, 20 mmol), dibutyl maleate (2.88 g, 20 mmol) and 100 mL of toluene. The mixture was refluxed and stirred for 15 minutes under an argon atmosphere, cooled to room temperature, and 250 mL of petroleum ether was added to produce a large amount of precipitate, which was filtered by suction.

[0085] After drying, 4.16 g of a light yellow solid was obtained with a yield of 92%.

[0086] (2) Synthesis of intermediate 7-B

[0087] In a 250mL round-bottomed flask, add Intermediate 7-A (4.07g, 18mmol) and 130mL of diphenyl ether, and the mixture is refluxed at 255°C for 5 hours under an argon atmosphere, filtered with suction, and washed with dichloromethane to obtain a brown Crude product 1.62g, yield 50%.

[0088] (3) Synthesis of intermediate ND-2Cl

[0089] In a 50mL two-necked ro...

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Abstract

The invention discloses a fluorescent material, a preparation method and an application thereof, wherein, the general formula of the molecular structure of the fluorescent material is: R1 to R10 are each independently selected from one of H atom, deuterium atom, electron donating group or electron withdrawing group species; and at least one of R1 to R10 is an electron-donating group, and at least one is an electron-withdrawing group; Ar is an electron-donating group. The fluorescent material provided by the invention has a twisted D(Donor)-A(Acceptor) structure, expands molecules on the long axis, improves the horizontal orientation of the transition dipole moment, and improves the light output efficiency, thereby improving the luminous efficiency of the electroluminescent device . In addition, the material has both heat-activated delayed fluorescence and aggregation-induced luminescence characteristics, which can not only achieve 100% internal quantum efficiency, but also reduce the luminescence quenching process caused by aggregation. When used in organic electroluminescent devices, its efficiency is comparable to that of phosphorescence, and its cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of electroluminescent materials, in particular to a fluorescent material, a preparation method and an application. Background technique [0002] Organic light-emitting diodes (OLEDs) have many advantages such as active light emission, fast response, flexible display, wide viewing angle, and low energy consumption. With the deepening of research and the maturity of preparation technology, especially the reduction of production cost, OLED has shown great application prospects in flat panel display and solid state lighting. [0003] Photoelectric conversion efficiency is an important parameter for evaluating OLEDs. Since the advent of organic light-emitting diodes, in order to improve the luminous efficiency of organic light-emitting diodes, various light-emitting material systems based on fluorescence and phosphorescence have been developed. OLEDs based on fluorescent materials have the characteristics of high stabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D519/00C09K11/06H01L51/50H01L51/54
Inventor 杨楚罗周雪
Owner SHENZHEN UNIV
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