Novel organic electroluminescent compounds and organic electroluminescent device using the same
A luminescent and compound technology, applied in the field of organic electroluminescent compounds, can solve the problems of poor purity of blue color and other problems
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preparation Embodiment 1
[0213] [Preparation Example 1] Synthesis of Compound (1)
[0214]
[0215] Preparation of compound (A)
[0216] Dissolve 2,6-dibromofluorene (53.0 g, 0.15 mol) in tetraoxyfuran (350 ml), and add n-BuLi (1.6 M n-hexane solution) (63.2 mL, 158 mmol) dropwise thereto at -78° C. ). After stirring for 30 minutes, N,N-dimethylformamide (16.3 mL, 211 mmol) was added to the mixture. The temperature was raised slowly and the reaction mixture was stirred for 2 hours. Join NH 4 After quenching the reaction with aqueous Cl solution (20 mL) and distilled water (20 mL), the organic layer was separated and evaporated under reduced pressure. The residue was recrystallized from methanol:n-hexane (1 / 1, v / v) (100 mL) to obtain compound (A) (20.9 g, 69.4 mmol).
[0217] Preparation of compound (B)
[0218] The obtained aldehyde compound (A) (20.9g, 69.4mmol), diphenylamine (12.5g, 104.1mmol), cesium carbonate (24.1g, 104.1mmol) and palladium acetate (Pd(OAc) 2 ) (332 mg, 2.1 mmol) w...
preparation Embodiment 2
[0224] [Preparation Example 2] Preparation of Compound (1081)
[0225]
[0226] Preparation of compound (A)
[0227] 2,6-Dibromofluorene (53.0 g, 0.15 mol) was dissolved in tetrahydrofuran (350 ml), and n-BuLi (1.6 M in n-hexane) (63.2 mL, 158 mmol) was slowly added dropwise thereto at -78°C. After stirring for 30 minutes, N,N-dimethylformamide (16.3 mL, 211 mmol) was added thereto. The temperature was raised slowly and stirring was continued for 2 hours. Then, add NH to it 4 The reaction was quenched with aqueous Cl (20 mL) and distilled water (20 mL). The separated organic layer was evaporated under reduced pressure. Compound (A) (20.9 g, 69.4 mmol) was obtained by recrystallization from methanol:n-hexane (1 / 1, v / v) (100 mL).
[0228] Preparation of compound (B)
[0229] The obtained aldehyde compound (A) (20.9g, 69.4mmol), diphenylamine (12.5g, 104.1mmol), cesium carbonate (24.1g, 104.1mmol) and palladium acetate (Pd(OAc) 2 ) (332 mg, 2.1 mmol) was suspended i...
Embodiment 1
[0429] [Example 1] Utilize compound of the present invention to prepare OLED
[0430] OLED devices were prepared using the electroluminescent compounds of the invention.
[0431] First, the transparent electrode ITO film (15Ω / □) for OLED made of glass was ultrasonically washed with trichlorethylene, acetone, ethanol and distilled water in sequence, and then stored in isopropanol until use.
[0432] Then, the ITO substrate is placed on the substrate holder (folder) of the vacuum vapor deposition equipment, 4,4 ', 4 "-three (N, N-(2-naphthyl)-phenylamino) triphenylamine ( 2-TNATA) (structure as follows) is placed in the chamber of the vacuum vapor deposition equipment, and then ventilated so that the chamber reaches a maximum of 10 -6 Torr vacuum. A current was applied to the chamber to evaporate 2-TNATA, thereby vapor-depositing a 60 nm-thick hole injection layer on the ITO substrate.
[0433]
[0434]Then, inject N, N'-two (α-naphthyl)-N, N'-diphenyl-4,4'-diamine (NPB) (...
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