Copolymer blue-ray host material, as well as preparation method and organic electroluminescent device thereof
A blue-light main material and main material technology, which is applied in the manufacture of electric solid-state devices, semiconductor devices, semiconductor/solid-state devices, etc., can solve the problems of low phosphorescence emission efficiency, achieve improved luminous efficiency, lower manufacturing costs, and easy-to-obtain raw materials Effect
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Embodiment 1
[0029] The copolymer blue light host material in this example, namely poly{2,7-diyl-3',6'-di-n-hexyloxyspiro[fluorene-9,9'-oxanthene]-co-1,4 -Bis(5-yl-1,3,4-oxadiazol-2-yl)benzene} (P1) (where R is n-hexyl, n=45), its structural formula is as follows:
[0030]
[0031] The preparation steps of above-mentioned polymer are as follows:
[0032] The reaction formula is as follows:
[0033]
[0034] Under the protection of argon, 2,7-dipinacol borate-3',6'-di-n-hexaneoxyspiro[fluorene-9,9'-oxanthene] (157mg, 0.2mmol), Add 1,4-bis(5-bromo-1,3,4-oxadiazol-2-yl)benzene (74mg, 0.2mmol) into a flask containing 10ml of toluene solvent, dissolve potassium carbonate (2mL, 2mol / L) solution into the flask, evacuated to remove oxygen and filled with argon, then added bistriphenylphosphine palladium dichloride (5.6mg, 0.008mmol); heated the flask to 100°C for Suzuki coupling reaction for 48h . Subsequently, the polymerization reaction was stopped after cooling down, and 50 ml of meth...
Embodiment 2
[0037] Example 2: The copolymer blue light host material of this example, that is, poly{2,7-diyl-3',6'-di-n-eicosyloxyspiro[fluorene-9,9'-xanthene] -co-1,4-bis(5-yl-1,3,4-oxadiazol-2-yl)benzene}(P2) (where R is n-eicosyl, n=70), its structural formula as follows:
[0038]
[0039] The preparation steps of above-mentioned polymer are as follows:
[0040] The reaction formula is as follows:
[0041]
[0042] Under the protection of mixed gas of nitrogen and argon, 2,7-dipinacol borate-3',6'-di-n-eicosyloxyspiro[fluorene-9,9'-oxanthene] (353mg ,0.3mmol), 1,4-bis(5-bromo-1,3,4-oxadiazol-2-yl)benzene (117mg, 0.3mmol) and 15mL tetrahydrofuran were added to a 50mL two-necked bottle, and after fully dissolving After introducing a mixture of nitrogen and argon to exhaust the air for about 20 minutes, tetrakistriphenylphosphine palladium (4mg, 0.003mmol) was added thereto, and after fully dissolving, sodium bicarbonate (3mL, 2mol / L) solution was added. Then, the mixed gas of n...
Embodiment 3
[0044]Example 3: The copolymer blue light host material of this example, that is, poly{2,7-diyl-3',6'-dimethoxyspiro[fluorene-9,9'-oxanthene]-co- 1,4-bis(5-yl-1,3,4-oxadiazol-2-yl)benzene} (P3) (where R is methyl, n=24), its structural formula is as follows:
[0045]
[0046] The preparation steps of above-mentioned polymer are as follows:
[0047] The reaction formula is as follows:
[0048]
[0049] Under nitrogen protection, 2,7-dipinacol borate-3',6'-dimethoxyspiro[fluorene-9,9'-oxanthene] (192mg, 0.3mmol), 1,4 - bis(5-bromo-1,3,4-oxadiazol-2-yl)benzene (123mg, 0.33mmol), palladium acetate (3.5mg, 0.015mmol) and tris(o-methylphenyl)phosphine (21mg , 0.06mmol) was added into a flask filled with 12mL of N,N-dimethylformamide, fully dissolved, and potassium carbonate (3mL, 2mol / L) solution was added, and then the flask was vented with nitrogen for about 30min; The flask was heated to 130 °C for Suzuki coupling reaction for 12 h. Subsequently, stop the polymerization...
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