Method for synthesizing pyrazoline derivatives capable of irradiating yellow green light

Abstract

Disclosed is a synthesis method of pyrazoline derivatives emitting olivine light, in which the pyrazoline derivative, 1-phenyl-3-[4-(N-phenyl-1-naphthylamine)ethylene]-5-[4-(N-phenyl-1-naphthylamine)phenyl]-2-pyrazoline brown-green crystals are finally prepared through three-times intermediates, by selecting material, preparing sollution, chemical combination reaction, heating, mixing, water-circulation condensation, ice water washing, argon protection, column chromatography purification, recrystallization purification, vacuum filtering, evaporation and drying, the products are grain diamond-shaped, the color coordinate is that x=0.3257, y=0.5452, the maximal emission wavelength of photoluminescence spectrum is 523 nm and the full width at half maximum is 96 nm. The products have high purity, pure color, excellent irradiance performance, high irradiance intensity and high lighteness, the products are also capable of improving the stability, reliability and life time of organic electroluminescent devices, being used in the fields of advance electronic display and irradiance illumination technology, the method of the invention is strictness and reasonable.

Description

technical field [0001] The invention relates to a synthesis method of pyrazoline derivatives emitting yellow-green light, and belongs to the technical field of application, synthesis and preparation methods of organic electroluminescent materials. Background technique [0002] Organic electroluminescent materials - pyrazoline compounds have good hole transport function and high fluorescence quantum efficiency. Pyrazoline compounds have been used as blue light emitting materials and hole transport materials in organic electroluminescent devices It has been applied and is often used in technical fields such as organic light guides and electrostatic printing. [0003] The thermal stability of pyrazoline compounds is relatively poor, which also limits its scope of application in organic electroluminescent devices. In the prior art, the synthesis and preparation methods of pyrazoline compounds also have many disadvantages and deficiencies. For example, crystallinity problems, th...

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Problems solved by technology

[0003] The thermal stability of pyrazoline compounds is relatively poor, which also limits its scope of application in organic electroluminescent devices. In the prior art, the synthesis and preparation methods of pyrazoline compounds also have many disadvantages and deficiencies. For example, crystallinity problems, thermal stability problems, low product purity and low yield also limit the further development and extended application of pyrazoline compounds

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