Preparation method and application of 4,4'-substituted benzil core-based luminescence and host material
A technology of host material and benzil nucleus, which is applied in the field of preparation and application of luminescence and host materials, can solve problems such as the potential of organic light-emitting diodes to be tapped, and achieve the effects of improving external quantum efficiency, good solubility, and single structure
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[0034] Example 1
[0035] In this embodiment, the luminescence and host material P1 based on 4,4'-substituted benzyl nuclei are prepared, and the reaction is shown in the following formula:
[0036]
[0037] Specific implementation steps: Add 4,4'-dibromo-substituted benzil (0.368mg, 1mmol), carbazole (367.4mg, 2.2mmol) and potassium carbonate (552mg, 4mmol) into dry toluene in a 250ml three-necked flask, Under nitrogen protection, palladium acetate (44 mg, 0.2 mmol) was added, and then tri-tert-butyl phosphine (0.73 ml, 0.73 mmol) was added dropwise. Under the protection of nitrogen, the reaction was heated to reflux for 12h. After the reaction, it was cooled to room temperature, extracted with dichloromethane, washed with water, dried with anhydrous magnesium sulfate, and passed through a silica gel column to obtain 500 mg of a yellow solid (yield 90%). Molecular formula: C 38 H 24 N 2 O 2 ; Molecular weight: 540.62; Elemental analysis: C, 84.42; H, 4.47; N, 5.18; O, 5.92.
Example Embodiment
[0038] Example 2
[0039] In this embodiment, the luminescence and host material P2 based on 4,4'-substituted benzil nuclei are prepared, and the reaction is shown in the following formula:
[0040]
[0041] Specific implementation steps: Add 4,4'-dibromo-substituted benzil (0.368mg, 1mmol), tert-butylcarbazole (614mg, 2.2mmol) and potassium carbonate (552mg, 4mmol) to dry toluene in a 250ml three-necked flask Under the protection of nitrogen, palladium acetate (44 mg, 0.2 mmol) was added, and then tri-tert-butyl phosphine (0.73 ml, 0.73 mmol) was added dropwise. Under the protection of nitrogen, the reaction was heated to reflux for 12h. After the reaction, it was cooled to room temperature, extracted with dichloromethane, washed with water, dried with anhydrous magnesium sulfate, and passed through a silica gel column to obtain 700 mg of a yellow solid (yield 91.5%). Molecular formula: C 54 H 56 N 2 O 2 ; Molecular weight: 765.05; Elemental analysis: C, 84.78; H, 7.38; N, 3.66;...
Example Embodiment
[0042] Example 3
[0043] In this embodiment, the luminescence and host material P3 based on 4,4'-substituted benzyl nuclei are prepared, and the reaction is shown in the following formula:
[0044]
[0045] Specific implementation steps: Under nitrogen atmosphere, add 100ml of toluene, 30ml of absolute ethanol, 40ml of 2M potassium carbonate aqueous solution, 4,4'-dibromo-substituted benzil (0.368mg, 1mmol), p-carbazole into a 250ml flask Phenyl borate (811 mg, 2.2 mmol), then 200 mg of triphenyl phosphopalladium catalyst was added, and refluxed at 110°C for 12 hours. Cool to room temperature, extract with dichloromethane, and dry with anhydrous magnesium sulfate. Column chromatography separated 600 mg of yellow solid with a yield of 86.7%. Molecular formula: C 50 H 32 N 2 O 2 ; Molecular weight: 692.82; Elemental analysis: C, 86.68; H, 4.66; N, 4.04; O, 4.62.
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