D-A small molecule compounds, and preparation method and application thereof
A technology of small molecular compounds and compounds, applied in the field of solar cells, to achieve the effects of high thermal and chemical stability, enhanced electron donating ability, and strong transfer ability
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[0028] The present invention also provides a preparation method of the D-A type small molecule compound described in the above technical scheme, which includes the following steps:
[0029] Under a protective gas atmosphere, the compound having the structure shown in formula IV, the electron-withdrawing monomer and the catalyst are reacted in an organic solvent system to obtain a D-A type small molecule compound having the structure shown in formula I, formula II or formula III;
[0030]
[0031] The electron withdrawing monomer is malononitrile, 2-ethylhexyl cyanoacetate or 3-ethyl rhodanine.
[0032] In the present invention, the compound having the structure represented by formula IV, the electron-withdrawing monomer and the catalyst are reacted in an organic solvent system under a protective gas atmosphere to obtain the D-A type small molecule compound described in the above technical scheme. In the present invention, when the electron withdrawing monomer is malononitrile, the pr...
Embodiment 1
[0096] Under the protection of argon, 0.2g (0.277mmol) of the compound represented by the structure of formula IV and 5mL CH were added to a 25mL round bottom flask. 2 Cl 2 And 54 mg of malononitrile (0.831 mmol); 15 mg of L-alanine was dissolved in 4.5 mL of absolute ethanol, the resulting L-alanine solution was added dropwise to the flask, and the reaction was stirred at 40°C overnight;
[0097] Add 30mL water to the resulting reaction solution and 50mLCH 2 Cl 2 After extraction, the obtained organic layer was washed three times with 0.36 g / mL brine, filtered, and the solvent was distilled off under reduced pressure under the conditions of a vacuum degree of 0.1 MPa and a distillation temperature of 35° C. to obtain a crude product;
[0098] The crude product obtained is purified by column chromatography. The column chromatography uses a silica gel column. The eluent of the column chromatography is CH with a volume ratio of 2:1. 2 Cl 2 And n-hexane to obtain 0.098 g of dark red so...
Embodiment 2
[0104] Under the protection of argon gas, 0.2g (0.277mmol) of the compound with the structure shown in formula IV and 28mL CH 2 Cl 2 , 1.35mL (6.73mmol) of 2-ethylhexylcyanoacetate and a catalytic amount of triethylamine, the resulting mixed solution was stirred and reacted at room temperature for 12h;
[0105] The obtained reaction solution was subjected to vacuum distillation to remove the solvent under the conditions of a vacuum degree of 0.1 MPa and a distillation temperature of 35° C. to obtain a crude product;
[0106] The crude product obtained is purified by column chromatography. The column chromatography uses a silica gel column. The eluent of the column chromatography is CH in a volume ratio of 2:1. 2 Cl 2 And n-hexane to obtain 0.15 g of dark red solid.
[0107] The yield of the product calculated by the present invention is 50%.
[0108] In the present invention, the obtained deep red solid is subjected to hydrogen nuclear magnetic resonance spectroscopy, and the result is...
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Abstract
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