A kind of copolymer containing dithiophene-thiarolobis(benzothiadiazole) and its preparation and application
A technology of benzothiadiazole and bisthiophene is applied in the field of bisthiophene-thirolodicopolymer and its preparation, which can solve the problems of low energy conversion efficiency, achieve narrow band gap, broad application prospect and excellent The effect of carrier mobility and structural flexibility
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Embodiment 1
[0066] A copolymer containing dithiophene-thiarolobis(benzothiadiazole), that is, poly{3-octyl[3,2-b]dithiophene-6,6 dioctylthiadiazole[3 , 2-e:4,5-e] bis(benzothiadiazole)} (n=52), denoted as copolymer P1, the structural formula is as follows:
[0067]
[0068] The preparation method comprises the following steps:
[0069] (1), the preparation method of 4,9-dibromo-6,7-dioctyl-benzo[2,1-e:3,4-e]bis(benzothiadiazole) (A1) includes the following Steps:
[0070]
[0071] (1) Preparation of compound 5-nitro-2,1,3 benzothiadiazole, the reaction formula is:
[0072]
[0073] Add 4-nitrobenzene-1,2-diamine (22.95g, 0.15mol) and 100mL thionyl chloride into a three-necked flask, stir and slowly add 2mL pyridine dropwise, heat and then reflux at 80~90°C for 24h , stop the reaction, heat to 80°C and spin evaporate excess thionyl chloride, then cool the reaction product to room temperature, pour it into a large amount of water, stir, filter, wash with water and then vacuum dr...
Embodiment 2
[0099] A copolymer containing dithiophene-thiarolobis(benzothiadiazole), that is, poly{3-n-eicosyl[3,2-b]dithiophene-6,6 dimethylsilole And [3,2-e:4,5-e]bis(benzothiadiazole)} (n=29), denoted as copolymer P2, the structural formula is as follows:
[0100]
[0101] The preparation method comprises the following steps:
[0102] (1), the preparation method of 6,6-dimethyl-4,8-dibromothiarolo[3,2-e:4,5-e]bis(benzothiadiazole) (A2) includes the following Steps:
[0103] According to the steps (1)-(4) of step (1) of Example 1, 4,4'-dibromo-6,6'-diiodo-bi-2,1,3-benzothiadiazole was prepared.
[0104] Compound C2, ie, dimethyldichlorosilane, having the structural formula shown in formula C2 is provided.
[0105] Add 4,4'-dibromo-6,6'-diiodo-bi2,1,3 benzothiadiazole (3.4g, 5mmol) and 50mL DMF into a three-necked flask, stir for 20min with nitrogen gas, and slowly drop Add 4.0mL of n-butyllithium n-hexane solution (2.5M, 0.01mol), drop it over in 0.5 hours, control the temperatur...
Embodiment 3
[0120] A copolymer containing dithiophene-thiarolobis(benzothiadiazole), that is, poly{[3,2-b]dithiophene-6,6 bis(n-eicosyl)thiadiazole[ 3,2-e:4,5-e]bis(benzothiadiazole)} (n=22), denoted as copolymer P3, the structural formula is as follows:
[0121]
[0122] The preparation method comprises the following steps:
[0123] (1), 6,6-bis(n-eicosyl)-4,8-dibromothiarolo[3,2-e:4,5-e]bis(benzothiadiazole) (A3) The preparation method comprises the following steps:
[0124] 4,4'-dibromo-6,6'-diiodo-bi-2,1,3-benzothiadiazole was prepared according to steps (1)-(4) of step (1) of Example 1.
[0125] A compound C3 having a structural formula as shown in the formula C3 is provided, that is, bis(n-eicosyl)dichlorosilane.
[0126]Add 4,4'-dibromo-6,6'-diiodo-bi2,1,3 benzothiadiazole (3.4g, 5mmol) and 50mL DMF into a three-necked flask, stir for 20min with nitrogen gas, and slowly drop Add 7.8mL of n-butyllithium n-hexane solution (2.5M, 0.0195mol), drop it over in 0.5 hours, control t...
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