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Dendritic ionic type iridium complex with subject-object structure and preparation method and application

A technology of iridium complexes and main structures, applied in the field of dendritic ionic iridium complexes, can solve the problems of too large similarity of complexes, affecting the stability and life of devices, and being difficult to design, so as to achieve large-scale industrialization. The effect of improving the compatibility and reducing the processing cost

Inactive Publication Date: 2013-11-27
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An effective way to prevent exciton quenching is to use a suitable host material, however, it is not easy to design a host material that matches well with the complex
In many cases, due to the large difference in structural similarity between the complex and the host material, the compatibility between the two is poor, and phase separation is prone to occur in the device, which will seriously affect the stability and life of the device.

Method used

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  • Dendritic ionic type iridium complex with subject-object structure and preparation method and application
  • Dendritic ionic type iridium complex with subject-object structure and preparation method and application
  • Dendritic ionic type iridium complex with subject-object structure and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: When X is N, Y 1 , Y 2 , Y 3 , Y 4 For tert-butyl, when n=4, the preparation of the neutral N^N auxiliary ligand containing the main structure:

[0035]

[0036] Synthesis of 2CZTRZ: First weigh 3,6-di-tert-butyl-9H-carbazole (1.4g, 8.5mmol) and place it in a 100mL three-neck flask A, vacuumize and nitrogen cycle three times, then add 50mLTHF solution to dissolve, Place the three-neck flask A in a dry ice bath of acetone, add 5 mL of butyl lithium solution dropwise at low temperature, and lithiate for 10 min. Also weigh 2,4,6-trichloro-1,3,5-triazine (0.74g, 4.0mmol) and place it in a 50mL three-neck flask B, vacuumize and fill with nitrogen three times, then add 20mL THF solution to dissolve. Take out the solution in bottle A and add it drop by drop to bottle B, and the dropwise addition is completed within 10 minutes. The temperature of the device was raised to 70°C, and the reaction was refluxed for 6h. The whole reaction process is strictly anhyd...

Embodiment 2

[0043] Example 2: When (dfppy), when the neutral N^N auxiliary ligand is 2CZTRZIZPY, the preparation of dendritic ionic iridium complex 1 with host-guest structure:

[0044]

[0045] Weigh 185.8mg, 0.2mmol of the N^N auxiliary ligand 2CZTRZIZPY containing the main structure and 133.7mg, 0.11mmol of the dichloro bridge intermediate of the raw material dfppy in a 50mL three-necked flask, vacuumize and nitrogen cycle three times, add CH 2 Cl 2 : MeOH=3:1 mixed solution 4mL reflux reaction for 4h; cooled to room temperature, added 147.25mg, 0.8mmol potassium hexafluorophosphate, reacted at room temperature for 4h, the product was spin-dried and passed through the column, the yield was 30%. 1 HNMR (400MHz, CDCl 3 )δ8.63(d,J=8.8Hz,4H),8.27(d,J=7.8Hz,3H),8.02(d,J=1.8Hz,5H),7.90(s,1H),7.76(s, 3H),7.54(d,J=16.0Hz,1H),7.41(dd,J=8.9,1.8Hz,4H),7.37(d,J=7.3Hz,1H),7.30(d,J=6.8Hz, 3H),7.08(s,4H),6.62(s,1H),6.53(dd,J=22.1,10.8Hz,2H),5.70(dd,J=27.0,7.5Hz,2H),4.80(s,2H ), 4.20(s, 2H), ...

Embodiment 3

[0046] Example 3: when (dfpypy), when the neutral N^N auxiliary ligand is 2CZTRZIZPY, the preparation of dendritic ionic iridium complex 2 with host-guest structure:

[0047] Weigh 185.8mg, 0.2mmol of the N^N auxiliary ligand 2CZTRZIZPY containing the main structure and 134mg, 0.11mmol of the dichloro bridge intermediate of the raw material dfpypy in a 50mL three-neck flask, vacuumize and nitrogen cycle three times, add CH2Cl2:MeOH =3:1 mixed solution 4mL reflux reaction for 4h; cooled to room temperature, added 147.25mg, 0.8mmol potassium hexafluorophosphate, reacted at room temperature for 4h, the product was spin-dried and passed through the column, the yield was 30%. 1 HNMR (400MHz, CDCl 3 )δ8.63(d,J=8.7Hz,4H),8.33(d,J=8.3Hz,1H),8.28(d,J=8.3Hz,2H),8.08–7.98(m,5H),7.93– 7.82(m,3H),7.77(d,J=5.7Hz,1H),7.64(d,J=5.5Hz,1H),7.41(d,J=7.4Hz,5H),7.36–7.27(m,4H ),7.23(d,J=6.3Hz,1H),7.08(d,J=8.8Hz,2H),6.65(s,1H),5.70(d,J=26.9Hz,2H),4.80(d,J =4.2Hz,2H),4.18(d,J=5.4Hz,2H),2.33–2....

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Abstract

The invention relates to a dendritic ionic type iridium complex with a subject-object structure and a preparation method and application. The iridium complex is formed by an annular metal ligands and a dendritic neutral auxiliary ligand with a subject structure. Through changing the structure of a main ligand, a series of ionic type iridium complexes with subject-object structures and different light-emitting colors can be obtained; the iridium complex with the subject-object structure disclosed by the invention can be applied to electroluminescent devices. The structural general formula of the material is expressed as follows (refer to the Specification).

Description

technical field [0001] The invention belongs to the field of organic electroluminescent materials, and specifically relates to a dendritic ionic iridium complex containing a host-guest structure. The invention also includes a preparation method for a dendritic iridium complex containing a host-guest structure, and also includes the Applications of substances in the field of organic electroluminescence. Background technique [0002] In the field of organic electroluminescence, since fluorescence emission can only use singlet excitons accounting for 25% of the total number of excitons, while phosphorescence emission can use triplet state excitons accounting for 75% of the total number of excitons to radiate light, so the luminous efficiency can be greatly improved. increase in magnitude. In 1998, Forrest and Thompson reported the phenomenon of phosphorescence electroluminescence for the first time, opening a new field of organic electroluminescence. Due to the inherent high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06H01L51/54
Inventor 赵强黄维宫涛许文娟刘淑娟杨成江
Owner NANJING UNIV OF POSTS & TELECOMM
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