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Other 9,9-dialkylfiuorene-carbaldehyde intermediates were synthesized as described for 9,9-didodecylfluorene-2-carbaldehyde except that different 1-alkylbromides were used. After purification, they were used without characterization.
9,10-Bis[(9,9-didodecylfluorene-2-yl)vinyl]anthracene (FLAC12). 9,9-Didodecylfluorene-2-carbaldehyde (0.167 g, 0.46 mmol) and 9,10-bis(diethylphosphorylmethyl)anthracene (0.10 g, 0.21 mmol) were dissolved in 20 mL of anhydrous THF. Potassium tert-butoxide (0.19 g, 1.67 mmol) was added and the resulting suspension was stirred for 5 h at room temperature.  Methanol was added into the mixture and the resulting solid was collected by  filtration. The crude product was purified by silica gel column chromatography (petroleum ether/dichloromethane ¼ 4/1, v/v). After recrystallization from chloroform¨C methanol, a yellowish-green solid was obtained (0.19 g, 75% yield).

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