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Oxadiazole group-containing red-light emitting iridium complex, and preparation method and use thereof

An oxadiazole group and iridium complex technology is applied in the field of iridium complexes and organic electroluminescence devices, which can solve the problems of carrier transport performance not meeting the requirements of organic electroluminescence devices OLEDs, annihilation and the like, and achieve improvement. Electron transportability, effect of improving efficiency and brightness, increasing probability of recombination

Inactive Publication Date: 2015-07-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, many Ir(III) complexes reported in the literature for OLEDs are prone to triplet-inter-triplet and triplet-polaron annihilation, and the carrier transport properties of the materials have not reached the organic electroluminescent device OLEDs. requirements

Method used

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  • Oxadiazole group-containing red-light emitting iridium complex, and preparation method and use thereof
  • Oxadiazole group-containing red-light emitting iridium complex, and preparation method and use thereof
  • Oxadiazole group-containing red-light emitting iridium complex, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation of ligands L1-L16 and corresponding iridium complexes G1-G16

[0026] 1. Preparation of Ligands

[0027] In the reaction kettle, drop 100mL of 30mmol p-bromobenzoyl hydrazide in chloroform into 100mL of 30mmol benzoyl chloride in chloroform, stir and react for 2 hours, filter out the precipitate, dry it in the air and add 20mL POCl 3 Reflux with 40 mL of toluene for 6 hours. The solvent was distilled off under reduced pressure, and recrystallized from a chloroform-methanol mixed solution. The crystallized product is 2-(4-bromobenzene)-5-phenyl-1,3,4-oxadiazole. Get 3.74mmol of 2-(4-bromobenzene)-5-phenyl-1,3,4-oxadiazole and dissolve it in anhydrous ether, and add 3.74mmol of n-butyllithium (2.4M n-hexane alkane solution), reacted overnight and slowly returned to room temperature. Then 10 mmol of hydrochloric acid was added dropwise in an ice-water bath to produce a white precipitate. After concentration by rotary evaporation, add methanol-pe...

Embodiment 2

[0208] Example 2: Fluorescence characterization of complexes of the present invention

[0209] The testing instrument is Hitachi F4600 fluorescence instrument, and the complex of above-mentioned iridium is dissolved in methylene chloride (10 -5 M) measure, under room temperature condition, emission peak position is respectively:

[0210] Complex R1:

[0211] lambda em,max , nm 633 (see attached figure 2 );

[0212] Complex R2

[0213] lambda em,max , nm 633 (see attached figure 2 );

[0214] Complex 3

[0215] lambda em,max ,nm 647 (see attached figure 2 );

[0216] Complex R16

[0217] lambda em，max ,nm 613 (see attached figure 2 ).

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Abstract

The invention discloses an oxadiazole group-containing red-light emitting iridium complex which has a structural formula shown in the specifications. The iridium complex can be used as a luminous layer in an electroluminescent device. Phenyl connected with oxazole is modified, the solubility of the complex is improved, and the complex is possibly used as an object material of an organic light emitting diode (OLED). The invention discloses a preparation method for the complex.

Description

field of invention [0001] The invention relates to an iridium complex and an organic electroluminescent device. Background technique [0002] Organic Electroluminescence Devices (Organic Electroluminescence Devices or Organic Light-emitting Diodes, referred to as OLEDs), also known as light-emitting diodes, is a device in which voltage is applied to convert electrical energy into light energy. It is an ideal display screen for mobile phones and color TVs. Since 1987, Tang [referring to: Tang, C.W.; Vanslyke, S.A.Appl.Phys.Lett.1987,51,913] of American Kodak Company published the electroluminescence (EL ) devices, the research on electroluminescent materials and devices has aroused great interest in the world's scientific and technological circles and industries. EL devices are generally considered to be low energy consumption, wide viewing angle, and large-area flat panel display technology. [0003] The unique advantages of OLEDs devices are closely related to the carrier ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D413/10C09K11/06H01L51/54
Inventor 徐秋蕾李红岩郑佑轩左景林游效曾
Owner NANJING UNIV