Blue organic electroluminescent phosphorescent material-iridium metal complex, preparation method thereof and organic electroluminescence device
An iridium metal complex and phosphorescent material technology, applied in the field of organic electroluminescence, can solve the problems of insufficient luminous color purity, luminous efficiency device efficiency attenuation, poor stability, short life, etc., and achieve good energy transmission efficiency, processing Low cost and the effect of improving luminous performance
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[0053] See figure 2 , The preparation method of the above-mentioned blue organic electro-phosphorescent material iridium metal complex includes the following steps:
[0054] S10: Provide compound A and compound B represented by the following structural formulas:
[0055]
[0056] Wherein R is a hydrogen atom, an alkyl group or an alkoxy group;
[0057] S20: Under the conditions of a catalyst, a base and an organic solvent, heating the compound A and the compound B to perform a Suzuki coupling reaction to obtain a cyclic metal ligand;
[0058] S30: polymerizing the cyclometal ligand obtained in step S20 and hydrated iridium trichloride in a mixture of 2-ethoxyethanol and water to obtain a chlorine bridged dimer;
[0059] S40: Polymerize the chlorine bridged dimer obtained in step S30 with the auxiliary ligand LX source to obtain a blue organic electrophosphorescent material iridium metal complex. The structural formula of the blue organic electrophosphorescent material iridium metal com...
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[0084] Example 1: A blue organic electro-phosphorescent material iridium metal complex tris(3-(4’,6’-difluoro-5’-trifluoromethylphenyl)pyridazine-N,C 2 ’)(2-Pyridinecarbonyl)iridium, as shown in the following structural formula:
[0085]
[0086] The preparation method of the blue organic electrophosphorescent material iridium metal complex includes the following steps:
[0087] (1) Provide compound A1 and compound B represented by the following structural formulas:
[0088]
[0089] (2) Synthesis of cyclometal ligand 3-(2’,4’-difluoro-3’-trifluoromethylphenyl)pyridazine
[0090]
[0091] Under the protection of nitrogen, 3.18g (20mmol) of compound A1 (3-bromopyridazine), 5.42g (24mmol) of compound B (2,4-difluoro-3-trifluoromethylphenylboronic acid), 80mL toluene, 20mL water, 3.22g (10mmol) tetrabutylammonium bromide (TBTA), 5.53g (40mmol) anhydrous potassium carbonate, 0.23g (0.2mmol) tetrakis(triphenylphosphorus) palladium, stir and heat To reflux state, react for 4h. After the r...
Example Embodiment
[0112] Example 2: A blue organic electro-phosphorescent material iridium metal complex tris (3-(4',6'-difluoro-5'-trifluoromethylphenyl)-6-methylpyridazine-N, C 2 ’) (2-Pyridinecarbonyl) iridium, as shown in the following structural formula:
[0113]
[0114] The preparation method of the blue organic electrophosphorescent material iridium metal complex includes the following steps:
[0115] (1) Provide compound A2 and compound B represented by the following structural formulas:
[0116]
[0117] (2) Synthesis of cyclometal ligand 3-(2’,4’-difluoro-3’-trifluoromethylphenyl)-6-methylpyridazine
[0118]
[0119] Under the protection of nitrogen, 3.46g (20mmol) of compound A2 (3-bromo-6-methylpyridazine), 5.42g (24mmol) of compound B (2,4-difluoro-3-trifluoromethyl) were added to the reactor Phenylboronic acid), 80mL toluene, 20mL water, 3.22g (10mmol) tetrabutylammonium bromide, 5.53g (40mmol) anhydrous potassium carbonate, 0.23g (0.2mmol) tetrakis(triphenylphosphorus) palladium, stirr...
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