Deep red photothermally activated delayed fluorescence material as well as preparation method thereof and electroluminescent devices
A technology of thermal activation delay and fluorescent materials, applied in the direction of luminescent materials, electric solid devices, chemical instruments and methods, etc., can solve the problem of inability to obtain device performance
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[0044] see figure 1 , figure 1 This is a flow chart of the preparation method of the deep red photothermally activated delayed fluorescence (TADF) material according to the embodiment of the present invention. like figure 1 As shown, the embodiment of the present invention also provides a preparation method of a deep red photothermally activated delayed fluorescence (TADF) material, comprising the following steps:
[0045] Step S10, adding compound A-X and compound D-B(OH) to the alkali-containing solution, wherein the X is a halogen, and the A is any one of the following structural formulas:
[0046]
[0047] The D is any one of the following structural formulas:
[0048]
[0049] Step S20, adding a palladium catalyst to the solution under an inert gas, and reacting at a first temperature for a first time to obtain a reaction solution;
[0050] Step S30, cooling the reaction solution to a second temperature to obtain a mixture; and
[0051] Step S40, separating the...
Example Embodiment
[0059] Example 1
[0060] In the specific embodiment 1 of the present invention, the target deep red photothermally activated delayed fluorescence (TADF) material to be synthesized includes the compound 1 of the following structural formula 2:
[0061]
[0062] The synthetic route of the compound 1 of the structural formula 2 is shown in the following reaction formula 1:
[0063]
[0064] The detailed synthesis steps of compound 1 are as follows:
[0065] 2-Bromotetracene-5,12-dione (3.36 g, 10 mmol), 4-(diphenylamino)-phenylboronic acid (3.18 g, 11 mmol), 30 mL of toluene and 10 mL of 2.5M aqueous potassium carbonate It was added to a 100 mL Schlenk bottle and purged with argon. Then, tetrakistriphenylphosphonium palladium (0.48 g, 0.4 mmol) was added, and the reaction was refluxed at 80° C. for 24 h. After cooling to room temperature, the reaction solution was extracted three times with DCM, washed three times with water, dried over anhydrous sodium sulfate, filtere...
Example Embodiment
[0066] Example 2
[0067] In the specific embodiment 2 of the present invention, the target deep red photothermally activated delayed fluorescence (TADF) material to be synthesized includes the compound 2 of the following structural formula 3:
[0068]
[0069] The synthetic route of compound 2 of structural formula 3 is shown in the following reaction formula 2:
[0070]
[0071] The detailed synthesis steps of compound 2 are as follows:
[0072] 2-Bromopentacene-5,7,12,14-tetraone (4.16 g, 10 mmol), 4-(diphenylamino)-phenylboronic acid (3.18 g, 11 mmol), 30 mL of toluene and 10 mL of 2.5 M potassium carbonate aqueous solution was added to a 100 mL Schlenk bottle and purged with argon. Then, tetrakistriphenylphosphonium palladium (0.48 g, 0.4 mmol) was added, and the reaction was refluxed at 80° C. for 24 h. After cooling to room temperature, the reaction solution was extracted three times with DCM, washed three times with water, dried over anhydrous sodium sulfate, ...
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