Thiophene[3,4-f]isobenzofuran-4,8-diketone polymer as well as preparation method and application thereof
A 4-f, polymer technology, applied in the field of material chemistry and electrochemistry, can solve the problems of FTD-based polymers that have not been reported
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[0047] The preparation method of thiophene[3,4-f]isobenzofuran-4,8-dione, the specific process is as follows:
[0048]
[0049] Synthesis of 2,5-dibromo-3,4-furandicarboxylic acid (2)
[0050] Furan-3,4-dicarboxylic acid (1) (16.7 mmol, 2.61 g) and 30 mL of glacial acetic acid were added to a 100 mL three-necked flask equipped with a constant pressure dropping funnel, a reflux condenser and a tail gas absorption device, and the temperature was raised to 50 o C was stirred for 0.5 h and cooled to room temperature. Liquid bromine (133.6 mmol, 21.4 g, 6.85 mL) was slowly added dropwise. After the addition was complete, the mixture was warmed to reflux and stirred overnight. Cool to room temperature, spin out most of the solvent under reduced pressure, add a small amount of deionized water, and slowly add sodium thiosulfate until the reaction no longer produces gas, filter, and rinse the filter cake with a small amount of deionized water three times. The resulting solid was ...
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