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Yellow phosphorescent Cu (I) complex luminescent material and preparation method thereof

A technology of luminescent materials and complexes, applied in luminescent materials, 1/11 group organic compounds without C-metal bonds, copper organic compounds, etc., can solve the problems of short excited state lifetime, low luminous brightness, etc. Effects of radiation attenuation, increased transition probability, and ease of purification

Active Publication Date: 2018-08-21
JIANGXI SCI & TECH NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with noble metals, copper complexes generally have shorter excited state lifetimes (nanosecond level), and Cu(I) complexes mainly emit green and blue light, and the luminous brightness is generally not high.

Method used

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  • Yellow phosphorescent Cu (I) complex luminescent material and preparation method thereof
  • Yellow phosphorescent Cu (I) complex luminescent material and preparation method thereof
  • Yellow phosphorescent Cu (I) complex luminescent material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Synthesis of Ligand L1 (2-OFPI).

[0028] As attached to the manual figure 1 The synthetic route is shown as:

[0029] (1) Synthetic ligand L1 (2-OFPI) precursor M1 (2-bromo-1-(9H-fluoren-2-yl) ethyl ketone), the structural formula is: (III)

[0030]

[0031] Add copper bromide (2.68g, 12mmol) and 25mL of ethyl acetate to a 50mL round bottom flask, transfer the above mixture to an oil bath, stir and reflux, and dissolve 2-acetylfluorene (1.25g, 6mmol) In 13mL of dichloromethane solution, slowly add dropwise to the above solution, and the dropwise addition is completed within 15min. After stirring and refluxing for 3.5h, filter through diatomaceous earth while it is hot, wash with ethyl acetate several times, and spin the filtrate under reduced pressure. The solvent was removed by evaporation to give a gray-green solid.

[0032] (2) Synthetic ligand L1 (2-OFPI) precursor M2 (2-(2-pyridyl) imidazole), the structural formula is: (VI)

[0033]

[0034] (3) Synthet...

Embodiment 2

[0037] Phosphorescent complex Cu(2-OFPI)(POP)(PF 6 ) Synthesis: as attached to the instructions image 3 As shown in the synthetic route, in a 50mL round-bottomed flask, add tetraacetonitrile copper hexafluorophosphate {[Cu(CH 3 EN) 4 ](PF 6) (0.062g, 0.2mmol)}, POP (0.108g, 0.2mmol) and dichloromethane solution (10mL), stirred at room temperature under nitrogen protection for 2h, and then dissolved 0.2mmol of ligand L1 (2-OFPI) in the Inject the degassed dichloromethane solution into the above mixed solution, react at room temperature for 2 hours, filter the reacted solution through diatomaceous earth, remove the solvent by rotary evaporation of the filtrate under reduced pressure to obtain a solid powder, and distill the powder with a small amount of dichloro The methane solution was dissolved, and a small amount of acetonitrile and a large amount of ether were added. It was observed that a large amount of precipitates were produced, and the precipitates were collected by...

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Abstract

The invention discloses a yellow phosphorescent Cu (I) complex luminescent material and a preparation method thereof. The phosphorescent Cu (I) complex is prepared from monovalent copper salt and a ligand by complexing, and has a molecular structure of Cu(2-OFPI)(POP)(PF6), wherein POP and 2-OFPI in the formula are electrically neutral ligands bis(2-phenylphosphinophenyl)ether and 1-(9H-fluoren-2-yl)-2-[(2-pyridin-2yl)-1H-imidazole-1-yl]ethanone. The complex has the advantages of high luminous efficiency and long luminous life, and also has the advantages of being easy to purify due to small molecules, high in stability and easy to dissolve. The material is prepared from Cu(CH3CN4)PF6 and a methylene chloride solution of the ligand by direct mixed reaction, and has the advantages that thestructure, the process and equipment are simple, raw materials are sufficient, the cost is low and the like. The material can be used as a photoluminescent yellow light material and can also be used as a luminescent layer phosphorescent material for electroluminescent devices prepared from multiple layers of organic materials.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, to the fields of photoluminescent materials and electroluminescent materials, and mainly relates to monovalent copper complexes and their preparation methods and applications. Background technique [0002] The research and development objects of phosphorescent materials are generally small molecule materials of metal-organic complexes rather than small organic molecules. The reason is that the phosphorescence of pure organic molecules is very weak at room temperature, and phosphorescence emission cannot even be detected. And the complex small molecule materials can realize phosphorescent emission conveniently. Organic transition metal complexes, due to the strong spin coupling (SOC) induced by metal heavy atoms, such as ruthenium (Ru), osmium (Os), iridium (Ir), can capture single-state and triple-state photons to participate in luminescence, Theoretically, high intrinsic luminous ...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07F1/08
CPCC07F1/005C09K11/06C09K2211/188
Inventor 赵丰柴朝阳
Owner JIANGXI SCI & TECH NORMAL UNIV
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