Organic electroluminescent material containing element germanium and organic luminescent device
An electroluminescence, elemental technology, applied in luminescent materials, electro-solid devices, germanium organic compounds, etc., can solve the problems of high driving voltage, low lifespan, low luminous efficiency, etc., improve the glass transition temperature, and avoid aggregation and quenching. , the effect of high luminous efficiency and service life
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Embodiment 1
[0069] Embodiment 1: the synthesis of compound 35
[0070]
[0071] Step1. Add carbazole 100mmol, 2,7-dibromo-9,9-dimethylfluorene 100mmol, potassium tert-butoxide 300mmol, Pd 2 (dba) 3 1mmol, ultrasonically deoxygenated xylene, stirred and dissolved, replaced the air three times, added 4% (4mmol, 50% m / V) of the ligand tri-tert-butylphosphine, replaced the air three times again, and refluxed for 6h. Cool to room temperature, add enough dichloromethane to completely dissolve the product, pass through a small amount of silica gel funnel, and remove catalyst and salt. The filtrate was concentrated to a viscous state and subjected to column chromatography to obtain 35-1 75 mmol.
[0072] Step2. Dissolve 75mmol 35-1 100mmol in anhydrous THF, cool down to -78 degrees Celsius, and add 1.5 equivalents of n-butyllithium under the protection of argon, and react for 1h. The temperature was slowly raised to room temperature, and triphenylchlorogermane was added, and the reaction w...
Embodiment 2
[0073] Embodiment 2: the synthesis of compound 37
[0074]
[0075] Step1. Dissolve 100 mmol of 3-bromo-9,9-dimethylfluorene in anhydrous THF, cool down to -78 degrees Celsius, and add 1.5 equivalents of n-butyllithium under the protection of argon, and react for 1 h. The temperature was slowly raised to room temperature, triphenylchlorogermane was added, and the reaction was completed for 1 h. The reaction solution was quenched with saturated ammonium chloride aqueous solution, extracted with EtOAc, washed, dried, and passed through a silica gel column to obtain 3750 mmol of the product.
Embodiment 3
[0076] Embodiment 3: the synthesis of compound 39
[0077]
[0078] Step1. Dissolve 100mmol 2,8-dibromo-dibenzofuran in THF and cool down to -78°C. Under the protection of nitrogen, 2 equivalents of LDA and 1 equivalent of diisopropylamine were added, and the obtained brown solution was stirred at this temperature for 2 hours, and 1 equivalent of iodine in THF solution was slowly added, and the reaction solution was gradually warmed to room temperature, and reaction 2 Hour. The pH was adjusted to 7 with 2N HCl, and the resulting solution was extracted three times with EA, washed, dried, and subjected to silica gel column chromatography to obtain 45 mmol of the product 39-1.
[0079] Step2.. Add 39-1 45mmol to a mixed solvent of toluene, ethanol, and water, add 1 equivalent of phenylboronic acid, 3 equivalents of sodium carbonate, and 0.01 equivalent of tetrakistriphenylphosphine palladium under nitrogen protection, and react at reflux temperature After 5h, the reaction wa...
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