Pyrrolo-indole based blue light phosphorescent host material, preparation method and organic electroluminescent device thereof
A phosphorescent host and indolyl technology, which is applied in pyrroloindolyl blue phosphorescent host material and its preparation, and in the field of organic electroluminescent devices, can solve problems such as shortage, achieve reduced manufacturing costs, easy availability of raw materials, and thermal stability good sex effect
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Embodiment 1
[0037] The pyrroloindolyl blue-light phosphorescence host material in this embodiment has a structure of 2,2-bis[(4-pyridoindol-9-yl)phenyl]adamantane, and its structural formula is as follows:
[0038]
[0039] The preparation process of this compound is as follows:
[0040]
[0041] Under nitrogen protection, 2,2-bis(4-iodophenyl)adamantane (43.2 g, 80 mmol) was dissolved in 200 mL N,N-dimethylformamide (DMF) solution, and then 5H-pyrrolo[ 4,3-b] indole (26.9g, 160mmol), potassium carbonate (22.1g, 160mmol), cuprous iodide (1.52g, 8mmol). The mixture was stirred and reacted at 120°C for 6 hours. Stop the reaction and cool to room temperature, filter, and wash the solid three times with distilled water. The crude product is separated by silica gel column chromatography using n-hexane as the eluent, and then dried under vacuum at 50°C for 24 hours to obtain off-white solid pyrroloindolyl blue phosphorescent host material. The yield was 74%. Mass spectrum: m / z620.3 (M ...
Embodiment 2
[0044] The pyrroloindolyl blue-light phosphorescence host material in this embodiment has a structure of 2,2-bis[(4-pyridoindol-9-yl)phenyl]adamantane, and its structural formula is as follows:
[0045]
[0046] The preparation process of this compound is as follows:
[0047]
[0048] Under nitrogen protection, 2,2-bis(4-iodophenyl)adamantane (43.2g, 80mmol) was dissolved in 200mL toluene (Tol) solution, and then 5H-pyrrolo[4,3-b]ind Indole (30.0g, 176mmol), cesium carbonate (57.2g, 176mmol), copper powder (0.768g, 12mmol). The mixture was stirred and reacted at 110°C for 9 hours. Stop the reaction and cool to room temperature, filter, and wash the solid three times with distilled water. The crude product is separated by silica gel column chromatography using n-hexane as the eluent, and then dried under vacuum at 50°C for 24 hours to obtain off-white solid pyrroloindolyl blue phosphorescent host material. The yield was 79%.
Embodiment 3
[0050] The pyrroloindolyl blue-light phosphorescence host material in this embodiment has a structure of 2,2-bis[(4-pyridoindol-9-yl)phenyl]adamantane, and its structural formula is as follows:
[0051]
[0052] The preparation process of this compound is as follows:
[0053]
[0054] Under nitrogen protection, 2,2-bis(4-iodophenyl)adamantane (43.2 g, 80 mmol) was dissolved in 200 mL of acetonitrile (MeCN) solution, and then 5H-pyrrolo[4,3-b]ind Indole (32.3g, 192mmol), potassium phosphate (39g, 184mmol), cuprous oxide (2.3g, 16mmol). The mixture was stirred and reacted at 90°C for 12 hours. Stop the reaction and cool to room temperature, filter, and wash the solid three times with distilled water. The crude product is separated by silica gel column chromatography using n-hexane as the eluent, and then dried under vacuum at 50°C for 24 hours to obtain off-white solid pyrroloindolyl blue phosphorescent host material. The yield was 76%.
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