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CuBrNP three-coordinate cuprous complex orange red phosphorescent material based on azafluorene

A phosphorescent material and three-coordination technology, which is applied in the field of luminescent materials and organic electroluminescent materials, can solve the problems of suppressing excited state distortions that are not ideal, limited, and luminous efficiency does not meet the requirements of the application, and achieve good phosphorescent emission performance , The equipment is simple, and the effect of promoting inter-system crossing

Inactive Publication Date: 2015-10-14
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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  • CuBrNP three-coordinate cuprous complex orange red phosphorescent material based on azafluorene
  • CuBrNP three-coordinate cuprous complex orange red phosphorescent material based on azafluorene
  • CuBrNP three-coordinate cuprous complex orange red phosphorescent material based on azafluorene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of a large amount of phosphorescent complex CuBr (DPPBP) (DAF) microcrystalline samples: Weigh 0.5 mmol of CuBr and dissolve it in 25 mL of acetonitrile, weigh 0.5 mmol of bis(diphenylphosphine) biphenyl ligand and dissolve it in 15 mL of ethanol , mix the two solutions, and stir to make the coordination reaction fully occur to obtain a colorless solution A; then weigh 0.5mmol of DAF ligand and dissolve it in 15mL of ethanol, then add this solution to the above solution A, and Stir to make the coordination reaction fully occur, and finally the obtained yellow reaction liquid is rotary evaporated to remove all solvents, and vacuum-dried to obtain yellow granular fine crystal powder as the product, with a yield of 98% (calculated as Cu). Elemental Analysis Calculated (C35H27N2PCuBr): C, 64.67%; H, 4.19%; N, 4.31%. Experimental values: C, 63.82%; H, 4.08%; N, 4.22%. IR (KBr pellet, cm -1 ): 3428m, 3051m, 2921w, 1583m, 1571m, 1479m, 1463m, 1434s, 1412s, 1391m,...

Embodiment 2

[0032] Synthesis of single crystal of phosphorescent cuprous complex CuBr(DPPBP)(DAF): Dissolve CuBr (0.015g, 0.1mmol) in 5ml of acetonitrile, ligand 4,5-diazafluorene (0.017g, 0.1mmol) and bis(diphenylphosphine)biphenyl (0.035g, 0.1mmol) were dissolved in 5ml of ethanol, after complete dissolution, the two were mixed, stirred rapidly for 5min and then filtered to obtain a yellow clear solution. The filtrate was placed in a 25ml beaker, covered with a plastic wrap, pierced with a needle and crystallized by volatilization. After about 3 days, yellow blocky crystals were obtained. A yellow bulk transparent crystal with a size of 0.28mm×0.15mm×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] A series of performance tests were carried out on pure-phase crystal samples of phosphorescent cuprous comp...

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Abstract

The invention discloses a CuBrNP three-coordinate cuprous complex orange red phosphorescent material based on azafluorene and a preparation method thereof. The phosphorescent complex is obtained by carrying out a coordination reaction of cuprous bromide and a ligand and has a molecular structural formula of CuBr(DPPBP)(DAF), wherein in the formula, DPPBP and DAF are respectively an electrically neutral P-containing ligand 2-(diphenylphosphine)biphenyl and an electrically neutral heterocyclic ligand 4,5-diazafluorene. The complex has the advantages of easy purification of small molecules, high luminous efficiency, and easy dissolving with use of an organic solvent. The material is obtained by carrying out direction mixed reaction of a cuprous bromide solution and a ligand solution, has the advantages of simple and convenient process, simple equipment, easily available raw materials, low cost and the like. The material can be used as the photoluminescent orange red photo-material, and also can be used as a luminous 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): C09K11/06C07F1/08C07F9/50H01L51/54
Inventor 宋莉吴叶文蒋畅王秋华
Owner ZHEJIANG SCI-TECH UNIV
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