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

A technology of dibenzothienyl bisphosphine and dibenzothiophene, which is applied in the field of multifunctional modified dibenzothienyl bisphosphine oxide and its preparation and application, can solve the problem that the main material of phosphorescent devices cannot simultaneously carry Problems such as carrier injection transmission capacity and high starting voltage

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 main body material of the electrophosphorescent device prepared by the existing method cannot have both high triplet energy level and good carrier injection and transport ability, which leads to its application as the main material of the electrophosphorescent device However, there is a problem of high start-up voltage, and a multifunctional modified dibenzothienyl bisphosphine oxide compound and its preparation method and application are provided.

Method used

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

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specific Embodiment approach 1

[0013] Specific embodiment 1: This embodiment is a multifunctional modified dibenzothienyl bisphosphine oxide compound, its chemical name is 4,6-bis(diphenylphosphineoxy)dibenzothiophene derivative, and its structure is as follows: Wherein said X, Y are as follows: (1) when X is Y is -H or (2) When X is Y is -H or (3) When X is Y is -H or (4) When X is Y is -H or

specific Embodiment approach 2

[0014] Specific embodiment two: This embodiment is a method for preparing a multifunctional modified dibenzothienyl bisphosphine oxide compound, the chemical name of which is 4,6-bis(diphenylphosphinooxy)dibenzothiophene derivatives. Completed according to the following steps: 1. Bromination: first, 4,6-bis(diphenylphosphinooxy)dibenzothiophene was dissolved in concentrated sulfuric acid, and then N-bromosuccinimide was mixed with 4, The molar ratio of 6-bis(diphenylphosphinooxy)dibenzothiophene is (1~1.2):1. Add N-bromosuccinimide and react with stirring for 2h~4h to obtain the brominated reaction product Using CH 2 Cl 2 and H 2O is extracted, and the obtained brominated organic layer is first dried with a desiccant, then spin-dried by rotary evaporation, and finally purified by column chromatography with ethyl acetate as eluent to obtain 2-bromo-4,6 - bis(diphenylphosphinooxy) dibenzothiophene; 2. Substitution: first add boric acid pinacol ester compound, tetrabutylammoni...

specific Embodiment approach 3

[0022] Specific embodiment three: This embodiment is a method for preparing a multifunctional modified dibenzothienyl bisphosphine oxide compound, the chemical name of which is 4,6-bis(diphenylphosphinooxy)dibenzothiophene derivatives. Completed according to the following steps: 1. Bromination: first, 4,6-bis(diphenylphosphinooxy)dibenzothiophene was dissolved in concentrated sulfuric acid, and then N-bromosuccinimide was mixed with 4, The molar ratio of 6-bis(diphenylphosphinooxy)dibenzothiophene is (2~2.5):1. Add N-bromosuccinimide and react with stirring for 2h~4h to obtain the brominated reaction product Using CH 2 Cl 2 and H 2 O is extracted, and the obtained brominated organic layer is first dried with a desiccant, then spin-dried by rotary evaporation, and finally purified by column chromatography with ethyl acetate as eluent to obtain 2,8-dibromo- 4,6-bis(diphenylphosphinoxy)dibenzothiophene; the ratio of the amount of 4,6-bis(diphenylphosphinoxy)dibenzothiophene su...

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Abstract

The invention discloses a multifunctional modified dibenzofuran-based di-phosphineoxy compound and a preparation method and an application thereof, which relate to a luminescent layer main body material in an electron phosphorescent device and a preparation method and an application thereof, and are used for solving the problem of high starting voltage during application of an electron phosphorescent device main body material prepared by using the conventional method since a high triple state energy level and high current carrier injection transport capability cannot be realized simultaneously. The preparation method of the multifunctional modified dibenzofuran-based di-phosphineoxy compound comprises the following steps of: I, performing a bromination reaction, and performing extraction, drying, spinning drying and column chromatography in sequence; and II, performing a substitution reaction, and performing extraction, drying, spinning drying and column chromatography in sequence. The multifunctional modified dibenzofuran-based di-phosphineoxy compound is applied as a luminescent layer main body material in an electron phosphorous device. The method is mainly used for preparing a multifunctional modified dibenzofuran-based di-phosphineoxy compound.

Description

technical field [0001] The invention relates to a host material of a light-emitting layer in an electrophosphorescent device, a preparation method and application thereof. Background technique [0002] Organic light-emitting diodes have the characteristics of self-illumination, high brightness, high efficiency, light and thin, wide viewing angle and easy processing. with broadly application foreground. In electroluminescence, the organic molecules excited by the recombination of electrons and holes are not limited by the spin selection law. According to the theoretical calculation of the statistical distribution, it can be known that the excited triplet state and the excited singlet state are generated by the excited organic molecules. The ratio of heavy states is 3:1; in other words, in electroluminescence, if other possible energy losses are not considered, fluorescent electroluminescence only utilizes about 25% of the input energy; the rest is in the excited triplet stat...

Claims

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Application Information

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IPC IPC(8): C07F9/6553C07F9/6558C09K11/06H01L51/54H01L51/56
Inventor 许辉韩春苗
Owner HEILONGJIANG UNIV
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