White light conjugated polymer, its preparation method and application
A technology of conjugated polymers and polymers, applied in the field of optoelectronic materials, can solve problems such as impact, low luminous efficiency, and large deviation of white light color coordinates from standard values
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Embodiment 1
[0017] Preparation of 9,9-dialkyl-2,7-dibromofluorene
[0018] The preparation of 9,9-di-n-octyl-2,7-dibromofluorene is taken as an example to illustrate. 9,9-Di-n-octyl-2,7-dibromofluorene was prepared according to the method disclosed in World Patent WO 9905184 in 1997 and the method disclosed in "Chem. Mater" (Chem. Mater) 11 (1997) 11083. Get 2,7-dibromofluorene (9.72 grams, 0.03 moles) obtained in Example 1, and pour benzyltriethylammonium chloride (0.07 grams, 0.3 mmoles) into a three-necked flask, and add 90 milliliters of dimethyl sulfoxide , 45 ml of 50% aqueous sodium hydroxide solution by weight, stirred vigorously at room temperature to form a suspension, added dropwise 1-bromo-n-octane (12.5 g, 65 mmol), continued to stir for 3 hours, then extracted with ether, combined ether phase, washed with saturated aqueous sodium chloride, and dried over anhydrous magnesium sulfate. The solvent was evaporated, and purified by column chromatography using n-hexane as eluent ...
Embodiment 2
[0021] Preparation of 9,9-dialkyl-2,7-bis(4,4,5,5-tetramethyl-1,3,2-ethylenedioxyboronate)fluorene
[0022] The preparation of 9,9-di-n-octyl-2,7-bis(4,4,5,5-tetramethyl-1,3,2-ethylenedioxyboronate)fluorene is taken as an example for illustration. 9,9-Di-n-octyl-2,7-diboronate fluorene was prepared as described in Macromolecules 30 (1997) 7686. Take the dried 9,9-di-n-octyl-2,7-dibromofluorene (5.6 g, 10.22 mmol) obtained in Example 2 and dissolve it in 130 ml of tetrahydrofuran (THF) after refining and drying, and dry under the protection of argon. At -78°C, 20 ml of n-butyllithium (1.6 mol / L, n-hexane as solvent, 32 mmol) was added dropwise, and the reaction mixture was stirred at -78°C for at least 1.5 hours, followed by the rapid addition of 2-iso Propoxy-4,4,5,5-tetramethyl-1,3,2-ethanedioxyborate (25 mL, 123.24 mmol), stirring was continued at -78°C for 2 hours. The reaction mixture was then allowed to gradually warm to room temperature and the reaction was stirred for...
Embodiment 3
[0025] Preparation of 9,9-dialkyl-2,7-bis(trimethylene borate)fluorene
[0026] The preparation of 9,9-di-n-octyl-2,7-bis(trimethylene borate)fluorene is taken as an example for illustration. Add n-butyllithium to the tetrahydrofuran solution of 9,9-di-n-octyl-2,7-dibromofluorene at -78°C, stir and react at -78°C for 1 hour, add excess trimethyl borate Esters, slowly warm up to room temperature, continue to stir for 2-12 hours, add dilute hydrochloric acid, pour the mixture into water after stirring, extract, wash the organic phase with water several times, dry, concentrate, further purify by column chromatography, and then ethanol Recrystallized to give a white solid. through 13 C NMR, GC-MASS and elemental analysis showed that the obtained product was 9,9-di-n-octyl-2,7-bis(trimethylene borate)fluorene.
[0027] The alkyl group in 9,9-dialkyl-2,7-bis(trimethylene borate)fluorene includes: n-hexyl, n-octyl, 2-ethylhexyl, decyl, but not limited thereto.
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