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Multifunctional modified dibenzofuran-based phosphineoxy compound and preparation method and application thereof

The technology of furyl bisphosphine and diphenylphosphine oxide is applied in the multifunctional modification of dibenzofuryl bisphosphine oxide compound and the fields of preparation and application thereof, which can solve the problem of high injection/transmission capability starting voltage, and achieves Excellent effect of good carrier injection/transport capability, good thermodynamic stability, driving voltage, and stability of luminous efficiency

Inactive Publication Date: 2013-01-30
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the compound prepared by the existing preparation method cannot maintain a high triplet energy level and good carrier injection / transport ability due to triplet-triplet annihilation and concentration quenching effects. The host material is applied to the problem of high start-up voltage of electroluminescent devices, and a multifunctional modified dibenzofuryl bisphosphine oxide compound and its preparation method and application are provided

Method used

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  • Multifunctional modified dibenzofuran-based phosphineoxy compound and preparation method and application thereof
  • Multifunctional modified dibenzofuran-based phosphineoxy compound and preparation method and application thereof
  • Multifunctional modified dibenzofuran-based phosphineoxy compound and preparation method and application thereof

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specific Embodiment approach 1

[0020] Specific embodiment 1: This embodiment provides a multifunctional modified dibenzofuryl bisphosphine oxide compound, which is a derivative of a compound with the chemical name 4,6-bis(diphenylphosphinooxy)dibenzofuran , the structural formula of the multifunctional modified dibenzofuryl bisphosphine oxide is:

[0021]

[0022] Wherein, X described in the structural formula, Y structure is as follows:

[0023] (1) X is Y is hydrogen or (2) X is Y is hydrogen or (3) X is Y is hydrogen or (4) X is Y is hydrogen or

[0024] The structural formula of the 4,6-bis(diphenylphosphinooxy)dibenzofuran compound described in this embodiment is:

[0025]

[0026] The multifunctional modified dibenzofuryl bisphosphine oxide compound provided by this embodiment can not only maintain a high triplet energy level, ensure sufficient energy transfer from the host to the guest, but also have good carrier injection / transport capabilities , so as to achieve the purpose ...

specific Embodiment approach 2

[0027] Specific embodiment two: The preparation method of the multifunctional modified dibenzofuryl bisphosphine oxide provided by this embodiment is specifically completed according to the following steps:

[0028] The preparation method of the multifunctional modified dibenzofuryl bisphosphine oxide compound is completed according to the following steps:

[0029] 1. Weigh 4,6-bis(diphenylphosphinooxy)dibenzofuran and dissolve it in concentrated sulfuric acid, add N-bromosuccinimide, stir and react at room temperature for 2h~6h, after the reaction , with CH 2 Cl 2 and H 2 O is extracted, the organic phase is dried with anhydrous sodium sulfate, the organic phase solvent is spin-dried, and purified by column chromatography using ethyl acetate as eluent to obtain 2-bromo-4,6-bis(diphenylphosphine oxy)dibenzofuran or 2,8-dibromo-4,6-bis(diphenylphosphineoxy)dibenzofuran, wherein the volume of concentrated sulfuric acid is equal to that of 4,6-bis(diphenylphosphine The ratio ...

specific Embodiment approach 3

[0042] Specific embodiment three: the difference between this embodiment and specific embodiment two is: N-bromosuccinimide and 4,6-bis(diphenylphosphinoxy)dibenzo The molar ratio of furan is 1:1 or 2:1. Others are the same as in the second embodiment.

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Abstract

The invention discloses a multifunctional modified dibenzofuran-based phosphineoxy compound and a preparation method and an application thereof, which relate to a functional compound and a preparation method and an application thereof, and are used for solving the problem of slightly high starting voltage of a device since a high triplet state energy level and high current carrier injection / transmission capability cannot coexist. The multifunctional modified dibenzofuran-based phosphineoxy compound designed by the invention is a derivative of a compound of which the chemical name is 4,6-di(diphenyl phosphineoxy)dibenzofuran. The structural formula of the multifunctional modified dibenzofuran-based phosphineoxy compound is shown in the specifications. The preparation method comprises the following steps of: I, preparing a 4,6-di(diphenyl phosphineoxy)dibenzofuran bromation product; and II, preparing a multifunctional modified dibenzofuran-based phosphineoxy compound. The multifunctional modified dibenzofuran-based phosphineoxy compound is applied to preparation of an organic light-emitting device. The multifunctional modified dibenzofuran-based phosphineoxy compound is applied to efficient portable display terminals and illuminating equipment.

Description

technical field [0001] The invention relates to a photoelectric functional compound, a preparation method and application thereof. Background technique [0002] Since Forrest and Thompson reported electrophosphorescence, phosphorescent organic light-emitting diodes (PHOLEDs) have received extensive attention due to their ideal properties as energy-efficient flat-panel displays and new-generation solid-state light sources, including their theoretical internal quantum efficiency of 100% . In order to suppress triplet-triplet annihilation and concentration quenching effects, most phosphorescent dyes of heavy metal complexes are doped in host materials to improve device performance. However, stable and efficient PHOLEDs are still a major challenge. In host-guest doped electrophosphorescent devices, in order to ensure effective energy transfer to the guest material, the host material is often required to have a higher first triplet energy level T 1 (about 3.0eV). Hosts with h...

Claims

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Application Information

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IPC IPC(8): C07F9/655C07F9/572C09K11/06H01L51/54H01L51/56
Inventor 许辉韩春苗
Owner HEILONGJIANG UNIV
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