Quinoxaline based copolymer, preparation method and applications thereof
A quinoxaline-based and copolymer technology, which is applied in the field of organic solar cell materials, can solve the problems of low conversion efficiency of inorganic solar cells, low carrier electrode collection efficiency, and mismatched spectral response, and achieve novel material structures and improved Effects of solubility and strong fluorescence
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Embodiment 1
[0027] Example 1: The quinoxaline-based copolymer of this example, that is, poly{2,2'-(9,10-bis(n-octyloxy)phenanthrene-2,7-diyl-co-5,8- Diyl-2,3-dimethyl-6,7-di(n-octyloxy)quinoxaline} (P1), (where R1 is n-octyl, R2 is n-octyl, n=52 ), its structural formula is as follows:
[0028]
[0029] The preparation steps of above-mentioned polymer are as follows:
[0030] The reaction formula is as follows:
[0031]
[0032] Under the protection of argon, 2,2'-(9,10-di(n-octyloxy)phenanthrene-2,7-dipinacol borate (137mg, 0.2mmol), 5,8-dibromo -2,3-Dimethyl-6,7-bis(n-octyloxy)quinoxaline (114mg, 0.2mmol) was added into a flask containing 10ml of toluene solvent, and potassium carbonate (2mL, 2mol / L) The solution was added to the flask, vacuumed to remove oxygen and filled with argon, then bistriphenylphosphinepalladium dichloride (5.6mg, 0.008mmol) was added; the flask was heated to 100°C for Suzuki coupling reaction for 48h. Then , stop the polymerization reaction after coo...
Embodiment 2
[0035] Example 2: The quinoxaline-based copolymer of this example, that is, poly{2,2'-(9,10-bis(methoxy)phenanthrene-2,7-diyl-co-5,8-di Base-2,3-dimethyl-6,7-di(n-eicosyloxy)quinoxaline} (P2), (where R1 is methyl, R2 is n-eicosyl, n=17 ), its structural formula is as follows:
[0036]
[0037] The preparation steps of above-mentioned polymer are as follows:
[0038] The reaction formula is as follows:
[0039]
[0040] Under the protection of a mixed gas of nitrogen and argon, 2,2'-(9,10-di(methoxy)phenanthrene-2,7-dipinacol borate (147mg, 0.3mmol), 5,8- Add dibromo-2,3-dimethyl-6,7-bis(n-eicosyloxy)quinoxaline (273mg, 0.3mmol) and 15mL tetrahydrofuran into a 50mL two-necked bottle, fully dissolve and pass nitrogen gas After exhausting the mixed gas with argon for about 20 minutes, add tetrakistriphenylphosphine palladium (4mg, 0.003mmol) into it, fully dissolve and then add sodium bicarbonate (3mL, 2mol / L) solution. After exhausting the mixed gas with argon for abou...
Embodiment 3
[0042]Example 3: The quinoxaline-based copolymer of this example, namely poly{2,2'-(9,10-bis(n-eicosyloxy)phenanthrene-2,7-diyl-co-5, 8-diyl-2,3-dimethyl-6,7-di(methoxy)quinoxaline} (P3), (where R1 is n-eicosyl, R2 is methyl, n=85 ), whose structure is as follows:
[0043]
[0044] The preparation steps of above-mentioned polymer are as follows:
[0045] The reaction formula is as follows:
[0046]
[0047] Under nitrogen protection, 2,2'-(9,10-di(n-eicosyloxy)phenanthrene-2,7-dipinacol borate (307mg, 0.3mmol), 5,8-dibromo -2,3-Dimethyl-6,7-di(methoxy)quinoxaline (124mg, 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 12h. After cooling down, the polymeriz...
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