Complex phosphorescent materials based on electron-deficient functional groups

A technology of functional groups and phosphorescent light-emitting materials, applied in the field of complex phosphorescent materials, can solve the problem of not paying much attention to the excited state of higher energy level, and achieve optimized carrier injection and transport properties, excellent display effect, and enhanced electroluminescence. effect of ability

Active Publication Date: 2022-06-21
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, little attention has been paid to the higher-level excited states

Method used

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  • Complex phosphorescent materials based on electron-deficient functional groups
  • Complex phosphorescent materials based on electron-deficient functional groups
  • Complex phosphorescent materials based on electron-deficient functional groups

Examples

Experimental program
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Embodiment 1

[0034] The structural formula of the ligand L-1 based on the electron-deficient functional group in this embodiment is: refer to figure 1 , the synthesis method is as follows: 1 equivalent of electron-deficient functional group compound and 1 equivalent four-tooth precursor Drop into the reaction vessel, under nitrogen atmosphere, add 0.05% equivalent of tetrakis (triphenylphosphine palladium) catalyst, 50 ml of tetrahydrofuran and 30 ml of potassium carbonate solution with a concentration of 2mol / L to the reaction vessel, in a nitrogen atmosphere The reaction was heated to 110° C. overnight; the heating was stopped, and after cooling to room temperature, deionized water was added to the reaction mixture, and the reaction mixture was extracted with dichloromethane. The obtained organic phase is dried with anhydrous sodium sulfate, concentrated, separated and purified by silica gel column, and then the corresponding ligand L-1 based on the electron-deficient functional gro...

Embodiment 2

[0037] The structural formula of the ligand L-2 based on the electron-deficient functional group in this embodiment is: refer to figure 1 , the synthesis method is as follows: 1 equivalent of electron-deficient functional group compound and 1 equivalent four-tooth precursor Drop into the reaction vessel, under nitrogen atmosphere, add 0.05% equivalent of tetrakis(triphenylphosphine palladium) catalyst, 50 ml of tetrahydrofuran and 30 ml of potassium carbonate solution with concentration of 2mol / L into the reaction vessel, in nitrogen atmosphere Heating to 110°C for overnight reaction; stopping heating, cooling to room temperature, adding deionized water to the reaction mixture, extracting the reaction mixture with dichloromethane; drying the obtained organic phase with anhydrous sodium sulfate, concentrating, and separating and purifying with silica gel column, namely The corresponding ligand L-2 based on electron-deficient functional groups can be obtained. The NMR char...

Embodiment 3

[0040] The structural formula of the ligand L-3 based on the electron-deficient functional group in this embodiment is: refer to figure 1 , the synthesis method is as follows: 1 equivalent of electron-deficient functional group compound and 1 equivalent four-tooth precursor Drop into the reaction vessel, under nitrogen atmosphere, add 0.05% equivalent of tetrakis (triphenylphosphine palladium) catalyst, 50 ml of tetrahydrofuran and 30 ml of potassium carbonate solution with a concentration of 2mol / L to the reaction vessel, in a nitrogen atmosphere Heating to 110 °C and reacting overnight; stopping heating, cooling to room temperature, adding deionized water to the reaction mixture, and extracting the reaction mixture with dichloromethane; drying the obtained organic phase with anhydrous sodium sulfate, concentrating, and separating and purifying with a silica gel column, namely The corresponding ligand L-3 based on electron-deficient functional groups can be obtained. Th...

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Abstract

The complex phosphorescent material based on the electron-deficient functional group, the general formula of the molecular skeleton is: R is an electron-deficient substituent; it represents an organic nitrogen heterocyclic ring; the present invention regulates the position of the excited state at a high energy level by introducing an electron-deficient functional group, and promotes its integration with The coupling effect between the lowest excited states enhances the luminous ability; the luminous efficiency of the obtained luminescent material in the host reaches up to 96%, and has potential application value in the fields of high-performance electroluminescence, photocatalysis, cell imaging, and chemical and biological detection.

Description

technical field [0001] The invention relates to the technical field of organic light-emitting, in particular to a complex phosphorescent material based on electron-deficient functional groups. Background technique [0002] Organometallic platinum complex phosphorescent materials have great application value in the fields of solar cells, organic synthesis catalysis, photocatalysis of water splitting, cell detection, targeted cancer therapy, and organic light-emitting diodes. The light-absorbing ability and luminescent ability of the complexes are one of the most important parameters to determine their application value; meanwhile, the redox ability of the complexes has an important influence on the carrier transport properties. The above properties are the regulatory points of great concern in current research. The commonly used methods include changing the number of dentate cyclic metal ligands, such as changing from bidentate ligands to tridentate or tetradentate ligands, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC07F15/0086C09K11/06C09K2211/185H10K85/346
Inventor 孙源慧杨晓龙周桂江
Owner XI AN JIAOTONG UNIV
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