Triazine exciplex material based on phosphine oxide and carbazole and its preparation method and application

A technology of exciplexes and triazines, which is applied in the field of triazine exciplex materials based on phosphine oxide and carbazole and its preparation and application, and can solve the problem of few blue light exciplex acceptor materials , to achieve the effects of high power efficiency, low driving voltage and high luminous efficiency

Active Publication Date: 2019-04-23
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problem that the existing blue light exciplex acceptor materials are few, and provides triazine exciplex materials based on phosphine oxide and carbazole and its preparation method and application

Method used

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  • Triazine exciplex material based on phosphine oxide and carbazole and its preparation method and application
  • Triazine exciplex material based on phosphine oxide and carbazole and its preparation method and application
  • Triazine exciplex material based on phosphine oxide and carbazole and its preparation method and application

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specific Embodiment approach 1

[0066] Specific embodiment one: The triazine exciplex material based on phosphine oxide and carbazole in this embodiment has a structure of:

[0067]

[0068]

specific Embodiment approach 2

[0069] Specific embodiment two: The preparation method of the triazine exciplex material based on phosphine oxide and carbazole described in specific embodiment one is carried out according to the following steps:

[0070] 1. Mix monobromotriphenyltriazine, carbazole compounds, anhydrous K 2 CO 3 Add CuI to 1,3-dimethyl-2-imidazolidinone (DMI) and mix, and react at 100-200°C for 24-48 hours under the protection of argon; after the reaction is completed, pour the reaction mixture into water, reduce The solid obtained by pressure suction filtration was dissolved with dichloromethane, washed three times with water, and the organic layer was washed with anhydrous Na 2 SO 4 Drying and spin-drying; the crude product is separated and purified by column chromatography using a mixture of petroleum ether: ethyl acetate = 10:1 as an eluent to obtain an intermediate compound; wherein the monobromotriphenyltriazine is o-bromo Triphenyltriazine, m-bromotriphenyltriazine or p-bromotriphen...

specific Embodiment approach 3

[0073] Specific embodiment three: the difference between this embodiment and specific embodiment two is that in step one, monobromotriphenyltriazine and anhydrous K 2 CO 3 The molar ratio of bromotriphenyltriazine to CuI is 1: (0.3-40); the molar ratio of bromotriphenyltriazine to CuI is 1: (0.01-0.1); the others are the same as in the second embodiment.

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Abstract

The triazine exciplex material based on phosphine oxide and carbazole and its preparation method and application are to solve the technical problem that the existing blue light exciplex acceptor materials are few. The structure of the triazine exciplex material based on phosphine oxide and carbazole of the present invention is as follows: preparation method: monobromotriphenyltriazine, carbazole compound, anhydrous K 2 CO 3 After adding CuI to 1,3-dimethyl-2-imidazolinone for reaction, the intermediate compound is purified; then the intermediate compound is reacted with diphenylphosphine and palladium acetate in anhydrous DMF, and then purified to obtain the triazine exciplex-like materials. The material can be used in TADF and phosphorescent organic electroluminescent devices.

Description

technical field [0001] The present invention relates to organic electroluminescence guest material, synthesis and application. Background technique [0002] In recent years, organic light-emitting diodes (OLEDs) have received extensive attention due to their advantages such as low driving voltage, high brightness, fast response, and high color purity. Among them, the thermally excited delayed fluorescence (TADF) mechanism is applied in the field of organic electroluminescence, and it is expected to prepare all-organic, low-cost, and high-environmental displays. The research on TADF systems mainly focuses on the research of guest materials. In order to make the guest molecules have TADF properties, it is necessary to make the molecules have a small singlet-triplet energy level difference (ΔE ST ), and in order to meet this requirement, the main design strategy adopted is to construct the electron donor (D)-electron acceptor (A) system, so that the highest occupied orbital (H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/6558C09K11/06H01L51/54H01L51/56
CPCC09K11/06C07F9/65583C09K2211/1018H10K71/164H10K85/654H10K85/6572
Inventor 许辉段春波韩春苗
Owner HEILONGJIANG UNIV
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