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An organic compound with triazine and benzimidazole as the core and its application in organic electroluminescent devices

A technology of organic compounds and benzimidazoles, which is applied to the application field of organic compounds and organic electroluminescent devices, can solve the problems of complex production process, influence on the angular distribution of OLED radiation spectrum, etc., and achieve high electron mobility and good application effect. and industrialization prospects, the effect of reducing the impact of deformation

Active Publication Date: 2019-03-22
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first two structures will affect the angular distribution of the radiation spectrum of the OLED. The third structure is complicated to manufacture, and the process of using a surface covering layer is simple, and the luminous efficiency is increased by more than 30%, which is particularly concerned by people.

Method used

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  • An organic compound with triazine and benzimidazole as the core and its application in organic electroluminescent devices
  • An organic compound with triazine and benzimidazole as the core and its application in organic electroluminescent devices
  • An organic compound with triazine and benzimidazole as the core and its application in organic electroluminescent devices

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: the synthesis of intermediate I

[0048]

[0049] Under nitrogen atmosphere, the raw material 2,4,6-trichloro-1,3,5-triazine was weighed and dissolved in tetrahydrofuran, and Ar 1 The boric acid compound and tetrakis (triphenylphosphine) palladium are added, the mixture is stirred, and then saturated potassium carbonate aqueous solution is added, and the mixed solution of the above reactants is heated and refluxed at a reaction temperature of 70-90° C. for 10-20 hours; after the reaction is completed, After cooling, the mixture was extracted with dichloromethane, the extract was dried over anhydrous sodium sulfate, and concentrated under reduced pressure, and the concentrated solid was purified by a silica gel column to obtain compound intermediate I;

[0050] The 2,4,6-trichloro-1,3,5-triazine and Ar 1 -B(OH) 2 The molar ratio of Pd(PPh 3 ) 4 The molar ratio to 2,4,6-trichloro-1,3,5-triazine is 0.005~0.05:1, K 2 CO 3 The molar ratio of 2,4,6-tric...

Embodiment 2

[0059] Embodiment 2: intermediate Synthesis

[0060] When Ar 2 or Ar 3 When expressed as a structure of general formula (2),

[0061]

[0062] (1) In a 250mL three-necked flask, feed nitrogen, add 0.02mol raw material 2-bromo-benzimidazole, 0.03mol iodobenzene, 0.04mol sodium hydride, 0.004mol cuprous iodide and 0.01mol o-phenanthroline and dissolve in In 100ml 1,3-dimethyl-2-imidazolidinone, stir the reaction for 20-30h, after the reaction, add water and extract with dichloromethane, dry the organic layer with anhydrous sodium sulfate, and use petroleum ether and ethyl acetate The mixture was rinsed with eluent, the volume ratio of petroleum ether and ethyl acetate in the eluent was 1:100, and purified by column chromatography to obtain intermediate M;

[0063]

[0064] (2) Under a nitrogen atmosphere, weigh the intermediate M and dissolve it in tetrahydrofuran, and then dissolve the Br-Ar 2 -B(OH) 2 And tetrakis (triphenylphosphine) palladium is added, the mixtu...

Embodiment 3

[0098] Embodiment 3: the synthesis of compound 1:

[0099]

[0100] In a 250mL three-necked flask, blow nitrogen gas, add 0.01mol of intermediate A1, 150ml of DMF, 0.03mol of intermediate B1, 0.0002mol of palladium acetate, stir, and then add 0.02mol of K 3 PO 4 The aqueous solution was heated to 150°C, refluxed for 24 hours, sampled and plated, and the reaction was complete. Cool naturally, extract with 200ml of dichloromethane, separate layers, dry the extract with anhydrous sodium sulfate, filter, rotate the filtrate, and purify through a silica gel column to obtain the target product with a HPLC purity of 99.1% and a yield of 72.1%.

[0101] Elemental analysis structure (molecular formula C 51 h 33 N 7 ): theoretical value C, 82.35; H, 4.47; N, 13.18; test value: C, 82.37; H, 4.48; N, 13.15. ESI-MS(m / z)(M + ): The theoretical value is 743.28, and the measured value is 743.62.

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Abstract

The invention relates to an organic compound with triazine and benzimidazole as the core and its application on OLED devices. The compound of the invention has high glass transition temperature and molecular thermal stability; low absorption in the field of visible light, low refractive index High, after being applied to the CPL layer of the OLED device, it can effectively improve the light extraction efficiency of the OLED device; the compound of the present invention also has a deep HOMO energy level and high electron mobility, and can be used as a hole blocking / electron transport of the OLED device Layer materials can effectively block holes or energy from the light-emitting layer to the side of the electron layer, thereby improving the recombination efficiency of holes and electrons in the light-emitting layer, thereby improving the luminous efficiency and service life of OLED devices.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to an organic compound with triazine and benzimidazole as the core and its application in organic electroluminescent devices. Background technique [0002] Organic electroluminescent (OLED: Organic Light Emission Diodes) device technology can be used to manufacture new display products and also can be used to make new lighting products, which is expected to replace the existing liquid crystal display and fluorescent lighting, and has a wide application prospect. The OLED light-emitting device is like a sandwich structure, including electrode material film layers and organic functional materials sandwiched between different electrode film layers. Various functional materials are superimposed on each other according to the application to form an OLED light-emitting device. OLED light-emitting devices are current devices. When a voltage is applied to the electrodes at both ends,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D403/14C07D405/14C07D409/14H01L51/54
CPCC07D403/14C07D405/14C07D409/14H10K85/626H10K85/615H10K85/654H10K85/6576H10K85/6574H10K85/6572H10K50/18C07D401/14H10K50/14H10K50/11H10K50/16
Inventor 张兆超李崇
Owner JIANGSU SUNERA TECH CO LTD
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