A polymer containing thienothiophene, benzothiadiazole and cyclopentadithiophene and its preparation and application
A technology of benzothiadiazole and dithiophene, which is applied in the fields of chemical instruments and methods, semiconductor/solid-state device manufacturing, organic chemistry, etc., can solve the problems of poor matching of absorption spectrum and solar spectrum, low energy transfer efficiency, Low energy conversion efficiency and other issues, to achieve the effect of expanding the light absorption range, improving carrier mobility, and reducing the band gap
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Embodiment 1
[0065] A polymer containing thienothiophene, benzothiadiazole and cyclopentadithiophene, specifically polymer P1 having the following general formula, wherein n=5:
[0066] P1:
[0067] The preparation method comprises the following steps:
[0068] One, the preparation method of compound A1 comprises the following steps:
[0069]
[0070] (1) Preparation of 2,5-dibromo-spiro[cyclopenta[2,1-b;3,4-b’]dithiophene-7,7’-benzofluorene] (d):
[0071] Provide compound a, that is, 2-bromophenylnaphthalene; provide compound b, that is, 2,6-dibromocyclopenta[2,1-b;3,4-b']dithiophen-4-one;
[0072] Under the protection of nitrogen, 1.42g (5mmol) of compound a was added to 60mL of anhydrous tetrahydrofuran, cooled to -78°C, and 3mL of n-butyl lithium in n-hexane solution (2.5mol / L, 7.5mmol) was slowly added, and the addition was completed. , after stirring and reacting at -78°C for 1 h, slowly add dropwise the solution obtained by dissolving 1.83 g (5 mmol) of compound b and 15 ml ...
Embodiment 2
[0090] A polymer containing thienothiophene, benzothiadiazole and cyclopentadithiophene, specifically a polymer P2 having the following general formula, wherein n=20:
[0091] P2:
[0092] The preparation method comprises the following steps:
[0093] One, the preparation method of compound A2 comprises the following steps:
[0094]
[0095] (1) Preparation of 2,5-dibromo-spiro[cyclopenta[2,1-b;3,4-b’]dithiophene-7,7’-benzofluorene] (d):
[0096] Provide compound a, that is, 2-bromophenylnaphthalene; provide compound b, that is, 2,6-dibromocyclopenta[2,1-b;3,4-b']dithiophen-4-one;
[0097] Under the protection of nitrogen, 1.42g (5mmol) of compound a was added to 60mL of anhydrous tetrahydrofuran, cooled to -78°C, and 2.4mL of n-butyl lithium in n-hexane solution (2.5mol / L, 6mmol) was slowly added, and the addition was completed. , after stirring and reacting at -78°C for 1 h, slowly add dropwise the solution obtained by dissolving 2.2 g (6 mmol) of compound b and 20 m...
Embodiment 3
[0115] A polymer containing thienothiophene, benzothiadiazole and cyclopentadithiophene, specifically polymer P3 having the following general formula, wherein n=40:
[0116] P3:
[0117] The preparation method comprises the following steps:
[0118] One, the preparation method of compound A3 comprises the following steps:
[0119]
[0120] (1) Preparation of 2,5-dibromo-spiro[cyclopenta[2,1-b;3,4-b’]dithiophene-7,7’-benzofluorene] (d):
[0121] Provide compound a, that is, 2-bromophenylnaphthalene; provide compound b, that is, 2,6-dibromocyclopenta[2,1-b;3,4-b']dithiophen-4-one;
[0122] Under the protection of nitrogen, 1.42g (5mmol) of compound a was added to 60mL of anhydrous tetrahydrofuran, cooled to -78°C, and 2.8mL of n-butyl lithium in n-hexane solution (2.5mol / L, 7mmol) was added slowly, and the addition was completed. , after stirring and reacting at -78°C for 1 h, slowly add dropwise the solution obtained by dissolving 2.0 g (5.5 mmol) of compound b in 20 ml o...
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