A thermally-induced delayed fluorescence conjugated polymer with well-defined structure and its preparation method and application
A technology of conjugated polymers and delayed fluorescence, which is applied in chemical instruments and methods, semiconductor/solid-state device manufacturing, luminescent materials, etc., can solve the problems of poor synthesis repeatability, unstable device efficiency, and unstable luminescent performance. High photoluminescence quantum efficiency, excellent solubility and film-forming properties, and good comprehensive luminescent performance
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[0042] The invention provides a preparation method of a thermally induced delayed fluorescence conjugated polymer with a clear structure, comprising:
[0043] The monomer having the structure of formula (II) and the monomer of the structure of formula (III) or the structure of formula (IV) are copolymerized to obtain the polymer of the structure of formula (I);
[0044]
[0045] where R 1 , R 2 independently selected from C1-C30 alkyl, C1-C30 alkoxy or C6-C35 substituted aryl;
[0046] A is a C5-C50 aryl group containing an electron withdrawing group;
[0047] x is a positive integer of x≥2;
[0048] n is 1-200.
[0049] In the present invention, the present invention copolymerizes the monomer having the structure of formula (II) with the monomer of the structure of formula (III) or the structure of formula (IV) to obtain the compound of the structure represented by formula (I); There are no special requirements for the conditions of the copolymerization, and the copol...
Embodiment 1
[0067] Example 1: Synthesis of polymer PABP2Cz
[0068] The preparation process is as follows:
[0069]
[0070] The specific steps are:
[0071] 2,7-Dibromo-9,9-dihexyl-10-(4-benzoylphenyl)-9,10-dihydroacridine (0.137 g, 0.2 mmol), dicarbazole borate mono Compound (0.212g, 0.2mmol), bis(tri-o-methylphenylphosphine) palladium dichloride (0.002g, 0.002mmol), potassium phosphate (0.340g, 1.6mmol) were added to a 50mL Schlenk bottle, and the 3 times, under argon protection, add deoxygenated dry tetrahydrofuran (5 mL) and deoxygenated deionized water (1 mL), and reflux at 80°C for 24 h; inject phenylboronic acid (0.003 g, 0.025 mmol) dissolved in 1 mL of tetrahydrofuran into the reaction solution, react for 6h, then inject 0.5mL of bromobenzene into the reaction solution, and react for 6h; add sodium diethylaminothiocarbamate (0.5g) dissolved in 10mL of water into the reaction solution, continue stirring for 12h; Extracted with methyl chloride, dried over anhydrous sodium su...
Embodiment 2
[0073] Example 2: Synthesis of polymer PABP3Cz
[0074] The preparation process is as follows:
[0075]
[0076] The specific steps are:
[0077]2,7-Dibromo-9,9-dihexyl-10-(4-benzoylphenyl)-9,10-dihydroacridine (0.137 g, 0.2 mmol), trimeric carbazole borate monoester Compound (0.293g, 0.2mmol), bis(tri-o-methylphenylphosphine) palladium dichloride (0.002g, 0.002mmol), potassium phosphate (0.340g, 1.6mmol) were added to a 50mL Schlenk bottle, and the 3 times, under argon protection, add deoxygenated dry tetrahydrofuran (5 mL) and deoxygenated deionized water (1 mL), and reflux at 80°C for 24 h; inject phenylboronic acid (0.003 g, 0.025 mmol) dissolved in 1 mL of tetrahydrofuran into the reaction solution, react for 6 h, then inject 0.5 mL of bromobenzene into the reaction solution, and react for 6 h; add sodium diethylaminothiocarbamate (0.5 g) dissolved in 10 mL of water into the reaction solution, and continue to stir for 12 h; Extracted with methyl chloride, dried over...
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