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, 6-di-methoxy)-9-vinylcarbazole, Synthesis of poly
32 mL of sodium methoxide in methanol (25 wt.%) and 4.05 g 605 of copper bromide (28 mmol, 4 equ.) were added to 2 g of PVK-Br 2 in 10 mL of DMF, 20 mL 606 of ethyl acetate and 20 mL of toluene in a 250 mL round bottomed flask. The reaction was 607 carried in inert atmosphere at 80°C for 24h. Then the mixture was poured over water, filtered 608 and washed with THF. Excess of solvents was evaporated. The left powder was resolubilized 609 in THF and precipitated in ethanol. Finally, filtration and drying overnight at 50°C led to 1.7 g 610 of PVK, -methoxy)-9-vinylcarbazole] was synthesized from PVK-Br2 by direct methoxide 604 displacement of bromine. First, p.611 ,
, (m, 2H) were identified. FTIR (Fig. S2) (ATR, 32 scans, cm -1 ) 3100-3000 ar
ar. C-H overtones, 1640-1070 skeletal 613 vibrations al. and ar. C-C, C=C stretch, 1260-1000 C-O stretch, 1060-860 C-H in-plane 614 bending, and 800-650 C-H out-of-plane bending were found. 615 616 (a) For reagents, price from Aldrich, except ( t Bu) 3 P from from STREM chemicals, Pd 2 (dba) 3 from 621 ABCR, and 4,4'-dimethoxdiphenylamine from TCI 622 (b) For solvents, pp.2300-1700 ,
, The cost for 1 g of PVK I was estimated to be about 59 ?/g which is significantly lower than 625 spiro-OMeTAD (250 ?/g Aldrich)