Blue organic electroluminescent phosphorescent material-iridium metal complex, preparation method thereof and organic electroluminescence device
A technology of iridium metal complexes and phosphorescent materials, which is applied in the field of organic electroluminescence, can solve the problems of luminous color purity, luminous efficiency, insufficient attenuation of device efficiency, poor stability, and short life, and achieve good energy transmission efficiency and processing Effect of low cost and improvement of luminous performance
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preparation example Construction
[0055] see figure 2 , the preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex, comprising the following steps:
[0056] S01: respectively provide compound A and compound B represented by the following structural formula:
[0057]
[0058] Wherein, R is a hydrogen atom, an alkyl group or an alkoxy group;
[0059] S02: Under the conditions of catalyst, alkali and organic solvent, compound A and compound B are heated to perform Suzuki coupling reaction to obtain a ring metal ligand;
[0060] S03: Combine the ring metal ligand obtained in step S02 with IrCl 3 ·3H 2 O is polymerized in 2-ethoxyethanol and water mixture to obtain a chlorine bridge dimer;
[0061] S04: Polymerize the chlorine bridge dimer obtained in step S03 and 2-pyridinecarboxylic acid in 1,2-dichloroethane to obtain the blue-light organic electrophosphorescent material iridium metal with the structural formula shown in formula (1) Complexes: ...
Embodiment 1
[0085]Example 1: A blue-light organic electrophosphorescent material iridium metal complex bis(3-(3',5'-difluoro-4'-trifluoromethylphenyl)pyridazine-N,C 2 ') (2-pyridinecarbonyl) iridium, as shown in the following structural formula:
[0086]
[0087] The preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex comprises the following steps:
[0088] (1) Provide compound A1 and compound B represented by the following structural formula respectively:
[0089]
[0090] (2) Synthesis of cyclometal ligand 3-(3’,5’-difluoro-4’-trifluoromethylphenyl)pyridazine
[0091]
[0092] Under nitrogen protection, 3.18g (20mmol) of compound A1 (3-bromopyridazine), 5.42g (24mmol) of compound B (3,5-difluoro-4-trifluoromethylphenylboronic acid), 80mL toluene, 20mL water, 3.22g (10mmol) tetrabutylammonium bromide (TBTA), 5.53g (40mmol) anhydrous potassium carbonate, 0.23g (0.2mmol) tetrakis (triphenylphosphine) palladium, stirre...
Embodiment 2
[0113] Example 2: A blue-light organic electrophosphorescent material iridium metal complex bis(3-(3',5'-difluoro-4'-trifluoromethylphenyl)-6-methylpyridazine-N, C 2 ') (2-pyridinecarbonyl) iridium, as shown in the following structural formula:
[0114]
[0115] The preparation method of the above-mentioned blue light organic electrophosphorescent material iridium metal complex comprises the following steps:
[0116] (1) Provide compound A2 and compound B represented by the following structural formula respectively:
[0117]
[0118] (2) Synthesis of cyclometal ligand 3-(3',5'-difluoro-4'-trifluoromethylphenyl)-6-methylpyridazine
[0119]
[0120] Under nitrogen protection, 3.46g (20mmol) of compound A2 (3-bromo-6-methylpyridazine), 4.52g (20mmol) of compound B (3,5-difluoro-4-trifluoromethyl) were added to the reactor phenylboronic acid), 80mL toluene, 20mL water, 3.22g (10mmol) tetrabutylammonium bromide (TBTA), 1.06g (10mmol) anhydrous sodium carbonate, 0.023g (...
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