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Organometallic complex as well as preparation method and application thereof

A technology of organic metals and complexes, applied in indium organic compounds, platinum group organic compounds, organic chemistry, etc., can solve the unsolved problems of blue phosphorescent materials, achieve good luminescence performance, wide spectrum application range, and low mass production cost Effect

Inactive Publication Date: 2018-01-19
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Red and green phosphorescent materials of cyclometalated iridium(III) complexes have been used in commercial display devices, but stable and efficient blue phosphorescent materials have not yet been solved.

Method used

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  • Organometallic complex as well as preparation method and application thereof
  • Organometallic complex as well as preparation method and application thereof
  • Organometallic complex as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0111] The embodiment of the present invention also proposes the preparation method of the organometallic complex, which at least includes the following steps:

[0112] The precursor material L and iridium chloride (IrCl 3 ) The dimer is prepared by reaction, and the dimer is reacted with the ligand compound to obtain the compound represented by the general formula I;

[0113] The chemical reaction equation is as follows:

[0114]

[0115]

Synthetic example 1

[0117] Synthesis Example 1: Ir-1 synthesis and structure characterization:

[0118]

[0119] Add N-phenylpyrazole, ethylene glycol methyl ether, deionized water and IrCl to the round bottom flask 3 ·3H 2 O, the resulting solution was evacuated three times under nitrogen atmosphere, and then refluxed for another 12 hours. After the reaction, the temperature was returned to room temperature, the solvent was removed by filtration, and the obtained dimer solid was filtered and washed with n-hexane and ether, and then dried in the air.

[0120] Add dimer (0.1g, 0.10mmol, 1.0eq), ligand (0.3g, 1.2mmol, 12.0eq), potassium carbonate (0.3g, 2.2mmol, 22.0eq), glycerol 3mL to the 60mL sealed tube, The temperature was raised to 200° C., the reaction was carried out for 14 hours, and then water was cooled and added. The dichloromethane (DCM) was used for extraction and liquid separation. The organic phase was dried, and PE:EA=10:1 was passed through the column to separate the target points to o...

Synthetic example 2

[0124] Synthesis Example 2: Ir-2 synthesis and structure characterization:

[0125]

[0126] Add dimer (0.1g, 0.10mmol, 1.0eq), ligand (0.2g, 0.82mmol, 8.2eq), potassium carbonate (0.3g, 2.2mmol, 22eq), ethylene glycol monomethyl ether 2mL to the 60mL sealed tube, N 2 After bubbling for about 15 minutes, the temperature was raised to 135°C, and the reaction was cooled to room temperature for 20 hours, filtered, and rinsed with 10 mL of water, ethanol, and petroleum ether to obtain 0.09 g of yellow solid with a yield of 62%.

[0127] The luminescence spectrum in dichloromethane solution at room temperature is as follows figure 2 As shown, the main emission peak is at 529nm, which is a green light material.

[0128] 1 H-NMR(300MHz,d 6 -DMSO)δ:5.92-5.95(d,1H),6.03-6.05(d,1H),6.58-6.70(m,3H),6.82-6.91(m,4H),7.49-7.57(m,3H), 7.72 (s, 1H), 7.82-7.85 (d, 1H), 8.00 (d, 1H), 8.05-8.09 (t, 1H), 8.72-8.74 (d, 1H), 8.79-8.80 (d, 1H). ESI MASS: 724.1, [M] + .

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Abstract

The invention relates to the technical field of organic light-emitting materials, in particular to an organometallic complex as well as a preparation method, a light-emitting device and application thereof. The organometallic complex is at least one of compounds as shown in a formula I. According to the invention, a ligand containing a pyridine unit is introduced into the organometallic complex ofring metal iridium (III), so that a ppz-Ir structure which does not emit light originally can emit light at room temperature, and can emit light in a range from a near-infrared region to a blue lightregion; a stable and efficient blue-green light material is obtained; and the organometallic complex has advantages of wide spectrum application range and low production cost.

Description

Technical field [0001] The invention relates to the technical field of organic light-emitting materials, in particular to an organometallic complex, its preparation method and its application. Background technique [0002] Organic Light Emitting Diode (Organic Light Emitting Diode), or OLED, refers to a kind of organic small molecules, metal organic complex molecules or polymer molecular light-emitting materials that directly convert electrical energy into light energy under the action of a forward-biased electric field. Luminous phenomenon. OLED has the characteristics of fast response speed, low driving voltage, high luminous efficiency and resolution, high contrast, wide viewing angle, autonomous light emission and no need for backlight, so it has received extensive attention from academia and industry. In addition, it can also be made on cheap glass, metal or even flexible plastics, so it also has the advantages of low cost, simple production process, and large-area producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC07F15/0033H10K85/342H10K50/11H10K2101/10H10K2102/103
Inventor 杭晓春张银刘长梅陈志宽马腾达刘九州陈少海
Owner NANJING UNIV OF TECH
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