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Divalent platinum complex and preparation method and application thereof

A platinum complex, complex technology, applied in platinum group organic compounds, platinum group organic compounds, chemical instruments and methods, etc.

Pending Publication Date: 2019-10-25
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the weakness of organic light-emitting devices is that the hole transport ability is generally greater than the electron transport ability, and the difference can reach 1 to 3 orders of magnitude through the comparison of mobility.

Method used

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  • Divalent platinum complex and preparation method and application thereof
  • Divalent platinum complex and preparation method and application thereof
  • Divalent platinum complex and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Embodiment 1 Complex 2 and its preparation

[0070] Synthesis of 2-((6-bromo-4-(1H-pyrazol-1-yl)pyridin-2-yl)oxy)-9-(pyridin-2-yl)-9H-carbazole:

[0071]

[0072] To a sealed 75 mL tube with a magnetic rotor was added 2,6-dibromo-4-(1H-pyrazol-1-yl)pyridine (2.11 g, 7 mmol), 9-(2-pyridyl)-9H-carb Azol-2-ol (1.65g, 6.36mmol), N,N-dimethylglycine (526mg, 5.1mmol), cuprous iodide (121mg, 0.636mmol), cesium carbonate (5.21g, 16mmol) and 1, 4-Dioxane (25 mL), the resulting mixture was bubbled with nitrogen for 10 minutes and then heated to 120° C. and stirred for 48 hours. Cool to room temperature, add water to quench the reaction, extract with ethyl acetate, combine the organic phases, wash with an appropriate amount of saturated aqueous sodium chloride solution and dry over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure, and the obtained crude product was separated and purified by silica gel column chromatography, and the eluent was pet...

Embodiment 2

[0082] Embodiment 2 Complex 3 and its preparation

[0083] Synthesis of 2-((6-isobutyl-4-(1H-pyrazol-1-yl)pyridin-2-yl)oxy)-9-(pyridin-2-yl)-9H-carbazole L3:

[0084]

[0085] To a sealed 5 mL tube with a magnetic rotor was added 2-((6-bromo-4-(1H-pyrazol-1-yl)pyridin-2-yl)oxy)-9-(pyridin-2-yl) -9H-carbazole (241mg, 0.5mmol), isobutylboronic acid (102mg, 1mmol), tetrakistriphenylphosphopalladium (18mg, 0.015mmol), potassium phosphate (200mg, 0.75mmol) and toluene (5mL), to obtain The mixture was bubbled with nitrogen for 10 min and then heated to 100 °C and stirred overnight. Cool to room temperature, add water to quench the reaction, extract with ethyl acetate, combine the organic phases, wash with an appropriate amount of saturated aqueous sodium chloride solution and dry over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure, and the obtained crude product was separated and purified by silica gel column chromatography, the eluent was petrol...

Embodiment 3

[0089] Embodiment 3 Complex 4 and its preparation

[0090] Synthesis of 2-((6-trimethylphenyl-4-(1H-pyrazol-1-yl)pyridin-2-yl)oxy)-9-(pyridin-2-yl)-9H-carbazole L4:

[0091]

[0092] To a sealed 5 mL tube with a magnetic rotor was added 2-((6-bromo-4-(1H-pyrazol-1-yl)pyridin-2-yl)oxy)-9-(pyridin-2-yl) -9H-carbazole (168mg, 0.35mmol), 2,4,6-trimethylphenylboronic acid (115mg, 0.7mmol), tris(dibenzylideneacetone) dipalladium (10mg, 0.0105mmol), tricyclohexyl Phosphine (4mg, 0.014mmol), cesium carbonate (228mg, 0.7mmol) and dioxane (1mL), the resulting mixture was bubbled with nitrogen for 10 minutes and then heated to 80°C and stirred overnight. Cool to room temperature, add water to quench the reaction, extract with ethyl acetate, combine the organic phases, wash with an appropriate amount of saturated aqueous sodium chloride solution, and dry over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure, and the obtained crude product was separated a...

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Abstract

The invention belongs to the technical field of organic electroluminescent materials, and particularly relates to a category of organometallic divalent platinum complex and a preparation method and application thereof. The divalent platinum complex has a chemical structure of a formula I, and is a blue light light-emitting material. The divalent platinum complex introduces pyrazolyl and pyridine into the ligand structure of the divalent platinum complex, the blue light light-emitting wave peak of the obtained four-tooth ligand coordination platinum heterocomplex is controlled between 450-465 nm, has the advantages of pure chromaticity and low energy, so as to obtain an effective eye protecting blue phosphorescent material, at the same time, has the characteristics of high thermal decomposition temperature and high quantum effects, and is more stable in photoluminescence and device electroluminescence, and is conducive to promoting the development of blue phosphorescent materials and improving the performance of blue light light-emitting devices.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, and in particular relates to a divalent platinum complex and a preparation method thereof, and the application of the divalent platinum complex as a luminescent material in organic photoelectric devices. Background technique [0002] OLED (Organic Light-Emitting Diodes, OLEDs) materials can emit different colors of light when electrified, and have good prospects in flat panel displays and solid-state lighting applications. Related products of semiconductor technology at the molecular level represented by organic light-emitting diode (OLED) technology have many advantages in terms of applicability and low energy consumption. At the current stage, the efficiency and lifespan of red and green light have reached the stage of industrialization, but the efficiency and lifespan of blue light have always been a shortcoming in the development of the OLEDs industry, and excellent blue emitt...

Claims

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Application Information

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IPC IPC(8): C07F15/00C09K11/06H01L51/50H01L51/54
CPCC07F15/0086C09K11/06C09K2211/185H10K85/346H10K50/11
Inventor 杭晓春朱露马会利
Owner NANJING UNIV OF TECH
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