acetone as solvent for two days with a yield of 86 a mixture of 9 9 dioctylfluorene 2 7 diboronic acid bis 1 3 propanediol ester 0 80 g 1 43 mmol 2 7 dibromo 9 fluorenone 0 24 g 0 72 mmol methyl 2 5 dibromobenzoate 0 21 g 0 72 mmol pph 3 4 pd 0 0 082 g 0 072 mmol and several drops of aliquat 336 in a mixture of 13 ml of thf tetrahydrofuran and 5 ml of 2 m na 2 co 3 solution was refluxed with vigorous stirring for 72 h under an argon atmosphere after reaction stopped the solution was concentrated by vacuum evaporation and the polymer was precipitated from methanol the resulting polymer was further purified by precipitating from methanol twice the final polymer was collected by suction filtration and dried under vacuum with a yield of 87 a mixture of pffomb 0 36 g and koh 2 g 35 mmol in 20 ml of thf and 2 ml of h 2 o was refluxed for 48 h under an argon atmosphere after reaction stopped the solution was concentrated by vacuum evaporation and polymer was precipitated from methanol the resulting polymer was suspended in 10 ml of concentrated h 2 so 4 with vigorous stirring for 12 hours the final product was filtered washed with water and dried with a yield of 96 reaction scheme for forming conductive polymer with u2014 cooch 3 pffomb and u2014 cooh pffoba groups on the side chains it has been found that the presence of u2014 cooh groups serves to increase the bindability of the polymer to the silicon.