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Dibromo substituted azafluorene-based CuINP three coordinate type cuprous complex light emitting material

A luminescent material and three-coordination technology, applied in the field of luminescent materials and organic electroluminescent materials, can solve the problems of unsatisfactory and limited excitation state distortion suppression, and luminous efficiency does not meet the application requirements, and achieve good phosphorescence emission performance. , The equipment is simple, and the effect of promoting the crossing between departments

Inactive Publication Date: 2015-11-04
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ligands used in the current research are limited by o-phenanthroline and bisphosphine ligands, and the suppression of excited state distortion is not ideal, and its luminous efficiency has not yet met the application requirements.

Method used

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  • Dibromo substituted azafluorene-based CuINP three coordinate type cuprous complex light emitting material
  • Dibromo substituted azafluorene-based CuINP three coordinate type cuprous complex light emitting material
  • Dibromo substituted azafluorene-based CuINP three coordinate type cuprous complex light emitting material

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Experimental program
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Effect test

Embodiment 1

[0030] A large number of phosphorescent complexes CuI(DPPBP)(DBDAF)·2H 2 Preparation of O microcrystalline sample: Weigh 0.5 mmol of CuI and dissolve it in 25 mL of acetonitrile, weigh 0.5 mmol of bis(diphenylphosphine) biphenyl ligand and dissolve it in 15 mL of chloroform, mix these two solutions, and stir Let it fully undergo a coordination reaction to obtain a colorless solution A; then weigh 0.5 mmol of 2,7-dibromo-4,5-diazafluorene ligand and dissolve it in 15 mL of chloroform, and then add this solution to the above solution A and stirring to make the coordination reaction fully occur, and finally the obtained orange-red reaction solution was rotary evaporated to remove all solvents, and dried in vacuum to obtain orange needle-shaped fine crystal powder as the product, with a yield of 95% (calculated as Cu). Elemental Analysis Calculated (C35H25N2PO2CuBr2I): C, 47.40%; H, 2.84%; N, 3.16%. Experimental values: C, 47.84%; H, 2.84%; N, 2.98%. IR (KBr pellet, cm -1 ): 34...

Embodiment 2

[0032] Synthesis of Phosphorescent Cuprous Complex CuI(DPPBP)(DBDAF)·2H 2 Single crystal of O: Dissolve CuI (0.010 g, 0.05 mmol) in 3 ml of acetonitrile, ligand 2,7-dibromo-4,5-diazafluorene (0.033 g, 0.1 mmol) and bis(diphenyl Phosphine)biphenyl (0.035g, 0.1mmol) was dissolved in 5ml of chloroform, after it was completely dissolved, the two were mixed, stirred rapidly for 5min, and then filtered to obtain an orange-red clear solution. The filtrate was placed in a 25ml beaker, covered with a plastic wrap, pierced with a needle and crystallized by volatilization. Orange needle-like crystals were obtained in about 5 days. An orange needle-like transparent crystal with a size of 0.35mm×0.26mm×0.10mm was selected for X-ray single crystal diffraction structure test. The molecular structure of the compound is shown in the attached figure 1 , and its unit cell packing structure is shown in the attached figure 2 .

[0033] p-phosphorescent cuprous complex CuI(DPPBP)(DBDAF)·2H 2...

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Abstract

The invention discloses a dibromo substituted azafluorene-based CuINP three coordinate type cuprous complex light emitting material and a preparation method therefor. A red phosphorescent complex disclosed by the invention is obtained by carrying out coordination reaction on cuprous iodide and a ligand. The molecular structural formula of the complex is CuI(DPPBP)(DBDAF).2H2O, wherein DPPBP and DBDAF are an electrically neutral ligand di(dihenyl phosphine) biphenyl and 2,7-dibromo-4,5-diazafluorene. The complex disclosed by the invention not only has the advantages of easily purification of small molecules and high light emitting efficiency, but also has the advantage of being easily dissolved by an organic solvent. The material is obtained by carrying out direct hybrid solution on cuprous iodide and the ligand and has the advantages of being simple and convenient in process, simple in equipment, easily available in raw materials, low in cost and the like. The material can be used as a photoluminescent red light material and can be further used as a luminescent layer phosphorescent material in an electroluminescent device composed of 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, in particular to the field of organic electroluminescent materials. Background technique [0002] From the classification of the type of stimulated light, luminescent materials can be divided into two categories: photoluminescent and electroluminescent materials. Photoluminescence refers to a phenomenon in which a luminescent material is excited by an external light source, an excited state is generated inside the material, and then quickly transitions from the excited state back to the ground state of the material, and at the same time emits photon radiation to the outside world. X-ray radiation, ultraviolet radiation, visible light and infrared radiation can all cause photoluminescence. Photoluminescent materials can be used in scintillators in nuclear detection technology, fluorescence analysis, traffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F19/00C09K11/06H01L51/54
Inventor 宋莉吴叶文蒋畅王秋华
Owner ZHEJIANG SCI-TECH UNIV
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