Bipolar blue light phosphorescent body material, preparation method thereof and organic electroluminescent device
A phosphorescent main body and bipolar technology, which is applied in the manufacture of electric solid-state devices, semiconductor devices, semiconductor/solid-state devices, etc., can solve problems such as shortage, achieve good thermal stability, and improve luminous efficiency.
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Embodiment 1
[0038] Example 1: The bipolar blue phosphorescence host material of this example, that is, 3,6-bis(4-(diphenylphosphinethio)benzene)-9-phenyl-9H-carbazole, the preparation steps are as follows:
[0039]
[0040] Under argon protection, 9-phenyl-3,6-dipinacol borate-9H-carbazole (99 mg, 0.2 mmol), (4-bromophenyl) diphenylphosphine sulfur (136 mg, 0.4 mmol) into a flask filled with 10ml of toluene solvent, after fully dissolving, potassium carbonate (2mL, 2mol / L) solution was added into the flask, vacuumed to remove oxygen and filled with argon, and then added bistriphenylphosphine dichloride Palladium chloride (5.6mg, 0.008mmol); the flask was heated to 100°C for Suzuki coupling reaction for 24h. Stop the reaction and cool to room temperature, extract the reaction solution three times with dichloromethane, and combine the organic phases obtained by the extraction. The organic phase is dried with anhydrous magnesium sulfate and then spin-dried to obtain the crude product. The...
Embodiment 2
[0042] Example 2: The bipolar blue phosphorescence host material of this example has a structure of 3,6-bis(4-(diphenylphosphinethio)benzene)-9-phenyl-9H-carbazole, and the preparation steps are as follows :
[0043]
[0044]Under the protection of mixed gas of nitrogen and argon, 9-phenyl-3,6-dipinacol borate-9H-carbazole (149 mg, 0.3 mmol), (4-bromophenyl) diphenylphosphine sulfur (224mg, 0.66mmol) and 15mL of tetrahydrofuran were added to a 50mL two-necked bottle, fully dissolved, and then a mixture of nitrogen and argon was introduced to exhaust the air for about 20 minutes, and then tetrakistriphenylphosphine palladium (4mg, 0.003mmol) was added Among them, sodium bicarbonate (3mL, 2mol / L) solution was added after fully dissolved. Then, the mixed gas of nitrogen and argon was exhausted for about 10 minutes, and the two-neck flask was added to 70°C for Suzuki coupling reaction for 48 hours. Stop the reaction and cool to room temperature, extract the reaction solution ...
Embodiment 3
[0045] Example 3: The bipolar blue phosphorescent host material of this example has a structure of 3,6-bis(4-(diphenylphosphinethio)benzene)-9-phenyl-9H-carbazole, and the preparation steps are as follows :
[0046]
[0047] Under nitrogen protection, 9-phenyl-3,6-dipinacol borate-9H-carbazole (149mg, 0.3mmol), (4-bromophenyl)diphenylphosphinesulfur (249mg, 0.72mmol ), palladium acetate (3.5mg, 0.015mmol) and tris(o-methoxyphenyl)phosphine (21mg, 0.06mmol) were added to a flask containing 12mL of N,N-dimethylformamide, and after fully dissolving Potassium carbonate (3mL, 2mol / L) solution was added, and then the flask was purged with nitrogen for about 30min; the flask was heated to 130°C for Suzuki coupling reaction for 12h. Stop the reaction and cool to room temperature, extract the reaction solution three times with dichloromethane, and combine the organic phases obtained by the extraction. The organic phase is dried with anhydrous magnesium sulfate and then spin-dried t...
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