Oxadiazole derivative containing carbazolyl and its electroluminescent device
A technology of oxadiazole and its derivatives, which is applied in the field of electroluminescent devices, can solve problems such as concentration quenching and exciton annihilation, and achieve the effects of improving power efficiency, improving brightness and efficiency, and high electroluminescence efficiency
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[0037] Referring to the accompanying drawings of the present invention, the products and methods of the present invention will be further described through specific embodiments.
[0038] The raw materials used in this embodiment are known compounds, which can be purchased in the market, or can be synthesized by methods known in the art.
[0039] 1. Synthesis of 2-(5-carbazolyl)benzyl-5-(4-biphenyl)-1.3.4-oxadiazole:
[0040] (1) Synthesis of 4-(9-carbazolyl)methyl-benzonitrile: equimolar carbazole (16.7g, 0.100mol) and p-cyanobenzyl bromide (19.6g, 0.100mol) are mixed in 50ml of toluene solution In, add 56g of 1:1 KOH aqueous solution, react at 50-60°C for 5h under the catalysis of 4-isobutylaluminum hydrogen, add the mixture into dichloromethane, and dissolve the obtained solid. Add an appropriate amount of water solution, wash the organic phase with water until neutral, and spin dry. The resulting solid was recrystallized from dichloromethane-ethanol. A pale yellow solid ...
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